Method and device for remote intervention by means of logic valve control

FIELD: mining.

SUBSTANCE: group of inventions refers to method and device for remote access by means of intelligent valve control, which can be used at operating down boreholes. The system consists of two or more valves, each accommodated to operate independently in a preset interval of pressure. Two or more valves are intended to perform a group of successive actions by means of one or several well tools on base of pressure of fluid medium exerted to two or more valves.

EFFECT: possibility of multiple usage of remote access per one lowering of equipment of bottom of casing string.

29 cl, 5 dwg

 

The scope of the invention

The present invention in General relates to the field of smart devices to remote intervention, when the device decides a logical, programmed a number of tasks through the use of an energy source. More precisely, the invention relates to a method and apparatus for remote access with intelligent valve control, which can be used when performing operations in descending drilling wells.

Background of invention

Most oil and gas is located at a depth of thousands of feet below the earth's surface in various underground formations. The main purpose of the oil and gas industry is the discovery of these reserves, access and production in a cost efficient manner. For access to these resources and their efficient extraction of oil and gas industry based on technology, which can solve various problems in remote underground formations with unfavorable characteristics of the environment. Examples of such tasks are drilling, perforating, stimulation of wells, logging, taking core samples, the sampling fluid, etc. processes to the greatest destruction is associated with high costs and requires a number of operations, based on guests are welcomed the work of the operators, and also requires a certain amount of special equipment to achieve the desired goal. Usually the largest part of the cost for remote access is associated with the time that with the help of special equipment, trained personnel must spend on the task. As a result, those technologies that deliver fast, efficient and reliable remote operations, increase the economic benefits that can be achieved for the considered reservoir by reducing the time required for remote access. The following discussion will explain the process of excitation of the tank to illustrate the difficulties associated with remote access, and to familiarize yourself with the benefits that can be obtained by using the proposed invention for solving the problem of excitation of wells for remote access.

When the underground formation with a reservoir containing hydrocarbons, does not have sufficient permeability or does not allow the flow of hydrocarbons to the surface in economically viable quantities or with optimal speed to increase consumption often use hydraulic fracturing or chemical (usually acid) excitation. Borehole penetrating subterranean f is rmatio, usually contains a metal pipe (casing pipe), planted on the cement initially drilled wellbore. Do the holes (perforations) to penetrate through the casing and cement sheath surrounding the casing, to allow the flow of hydrocarbons in the borehole and, if necessary, the possibility of the flow of the processing fluid from the borehole into the formation.

Hydraulic fracturing involves the injection of fluid (usually viscous, providing shear, wikinewsie effect of non-Newtonian gels or emulsions) into the formation under high pressure and at such a high speed that the rock of the reservoir collapses and forms a flat, generally vertical crack (or network of cracks), much like a crack that runs through the log, when it comes mallet. Usually the last part of the discontinuous fluid pump granular propping material, such as sand, ceramic beads or other materials to hold the crack (fissure) in the open state after pressure relief. Increased flow from the tank is a consequence of the education path of thread left between the grains of the riving material inside the crack (cracks). In the case of treatments for the chemical in the bogdania consumption increase by dissolving the materials in the formation or by other changes in the properties of the formation.

The use of hydraulic fracturing, which is described above, represents an established practice on the part of operations in the oil industry, while hydraulic fracturing is used in some of the planned areas, in General, up to about 60 meters (200 feet) thick underground formation. When should be carried out hydraulic fracturing in a large number of tanks, or in layered reservoirs, or in a very thick formation (approximately 60 meters), containing hydrocarbons, requires the use of alternative treatment technologies, to ensure the processing of a given area.

When multiple zones containing hydrocarbons, stir through hydraulic fracturing or chemical treatment, economic and technical benefit through the introduction of multiple stages of processing, which can be separated by various means, including mechanical devices such as bridge plugs, packers, valves, drilling wells, slides, combinations of partitions/tubes, ball sealers, small particles, such as sand, ceramic material, propping material, salt, waxes, resins and other compounds, either through systems with alternative fluid environments, such as thickened fluids of heliobar the major fluids, foam or other chemically composed of fluids, either through the use of methods of limited entry. For example, when mechanical crawling through the bridge first tube perforined the deepest interval and stir well by fracturing, then the interval is usually isolated by a bridge tube installed through steel cable, and the process is repeated in subsequent, located above the interval. If we assume the presence of the predetermined perforation intervals, the processing similarly to 300 meters (1000 feet) formation usually requires ten transactions for a period of time from ten days to two weeks, and not only perform numerous treatments to fracturing, but also numerous ongoing operations of punching and setting bridge plugs. At the end of the process will require the operation of cleaning the drill hole to remove the bridge tube and enter the well into operation. The main advantage of using bridge plugs or other mechanical deflecting agents is high confidence in the execution of the processing of a given area. The main disadvantage is the high cost of processing because of the many descents into the well and rises from it equipment and the dangers of Oslo the changes due to run in the borehole such a large number of operations. For example, a bridge plug may be jammed in the casing pipe and must be drilled, resulting in significant costs. Another disadvantage is that the required cleanup operation borehole may cause damage to some of the intervals, successively subjected to the gap.

To address some of the limitations associated with operations that require multiple runs of the snap-in hole and climbs out of the well with the purpose of perforating and stimulation of subterranean formations, the proposed methods and devices for deploying a site with downhole tools for one-the descent-ascent”to provide stimulation by fracturing in areas associated with perforation. Specifically, these methods and apparatus provide operations that allow to minimize the number of operations performed in a borehole, and the time required for these operations, thereby reducing processing costs for excitation well. The tubing of the instrument used in such cases can be quite long, and the tool should provide a number of tasks in a remote environment downward borehole. Equipment column of pipes assembled to address these tasks in descending a borehole, usually called compo is ovcoy bottom hole Assembly (BHA) or equipment of the bottom of the casing string.

Device and method requires the following: 1) independent of the number of actions in descending a borehole; 2) independent operations in programmable logical sequence; 3) independent operations in due time; 4) the use of pressure as a basis for control and actuation; 5) the number of independent cycles in one descent-ascent; (6) eliminating the need for operator interaction; 7) providing operational flexibility to implement the most reliable and proven equipment designs (ring and not ring structures). The result can be created very reliable, made with advanced logic equipment bottom of the casing, providing reusability remote access for one descent-ascent, and with little interaction with the surface or failing that, mainly driven by pressure casting or control device downward in the well.

Summary of the invention

In one of the embodiments of the present invention disclosed a system of one or more valves, which valves are in their range of pressure and installed in such a way, storiesspecial execution sequence a series of events through one or more downhole tools when exposed to the pressure valve. In one of the embodiments of the system according to this invention, one or more of the valves are plug valves, and in particular design option, at least one of the plug-valve is a plug valve one purpose. In one of the embodiments of the system according to this invention, one or more of the valves are circular valves. In one of the embodiments of the system according to this invention, the number of events selected from the group consisting of actuation of the packer, the pressure equalization, the actuation of the flow of flushing fluid, the operation of the perforating device, actuation of the support wedges, the actuation cable, actuation of electrical devices, the actuation of the measuring device, the actuation device for sampling, actuation means for deploying equipment, actuation of the downhole motor, the actuation of the generator, the actuation of the pump, the actuation system of communication, forcing the fluid, remove the fluid, heating, cooling, actuation of bridge plugs, actuation tubes for cracks, actuation optical whom their devices the liberation of equipment bottom of the casing string, the drilling operation, the cutting operation, the expandable tubing, expandable end and the actuation of mechanical devices. In one of the embodiments of the system according to this invention, the above-mentioned valves serve one or more remote electronic devices that transmitted over cable with basic command unit. In one of the embodiments of the system according to this invention, the valves control one or more remote electrical devices which are supplied with energy in a remote location without using a cable. In one of the embodiments of the system according to this invention, at least one of the valves is designed to allow the passing through of the fluid flow in only one direction. In one of the embodiments of the system according to this invention, at least one of the valves is designed to stop the passage through it of the fluid flow when the flow reaches a preset speed or acts on the valve set pressure. A qualified specialist in this area can set the desired speed and/or target pressure based on those conditions, which must be COI is used, the system according to the invention. In one of the embodiments of the system according to the present invention, at least one of the valves is suitable for transmission through the fluid flow when the flow is exerted on the valve set pressure. A qualified specialist in this area can set target pressure based on the conditions in which the system according to the invention should be used. In one embodiment, the system according to the invention contains at least one filter designed to filter solid particles having a certain size, of the fluid before the fluid medium will flow through one or more valves, or through the system. A qualified specialist in this field can be set to the specified dimensions of the solid particles to be filtered on the basis of conditions in which systems will be used. In one embodiment, the system according to this invention contains at least one rupture disk designed to allow leakage of fluid from one or more downhole tools when one or more preferred conditions. A qualified specialist in this field can install the specified conditions based on the conditions in which systems will be used. In one embodiment, the system according to this invention contains one or more apertures, designed to restrict the flow of fluid through the system to the desired speed. A qualified specialist in this area can set the desired speed on the basis of conditions in which systems will be used. In one embodiment, the system according to this invention contains one or more apertures that are designed to restrict the flow of fluid through one or more valves to a predetermined speed. A qualified specialist in this area can set the desired speed on the basis of conditions in which systems will be used.

In one embodiment, the disclosed method of perforation and processing multiple intervals of one or more subterranean formations traversed drilling the well that contains the following stages: a) deploying equipment bottom of the casing from the pipe string within the borehole, while the equipment of the bottom of the casing contains the perforating device and the sealing mechanism; b) the use of a punching device for punching at least one interval of one or more subterranean formations; equipment installation the bottom of the casing in position within the bore hole and the operation of the sealing mechanism in such a way as to provide a hydraulic seal, p the least under one perforated interval; g) the discharge of the processing fluid down into the ring between the casing pipe and the drill hole and the perforation created by perforating device without removal of the perforating device from the borehole; d) exemption sealing mechanism; (e) repeating steps (b)-(d)at least one additional interval of one or more subterranean formations, in this case, at least one of the stages is performed through a system of valves, which operates in a predetermined pressure range, and ensures the implementation of this stage in the closing pressure to the valves. In one embodiment, perform additional stages, and these stages are selected from the group consisting of leaching of rock fragments surrounding the sealing mechanism, the equalization of pressure on the sealing mechanism, providing electrical communication through the sealing mechanism.

In one embodiment, the disclosed device to perform a sequential series of events through one or more downhole tools under pressure in a predetermined range of pressure, the device contains a combination of two or more valves arranged in the form of nodes, one of which communicated with others through connections, isolating the pressure. In one of the variations is tov exercise device according to this invention, the valves are plug valves, located in the nodes. In one of the embodiments of the device according to this invention provide a message to the pressure between the valves and between nodes via connections, isolating the pressure. In one of the embodiments of the device according to this invention provide a message through the site via a cable. In one of the embodiments of the device according to this invention, at least one of the valves can be used for transmission through the fluid flow only in one direction. In one of the embodiments of the device according to this invention, at least one of the valves is designed to stop the passage through it of the fluid flow in the case, when the flow velocity reaches a specified value or fluid acts on the valve set pressure. A qualified specialist in this field can be set with the set speed or set pressure based on the conditions in which the device will be used. In one of the embodiments of the device according to this invention, at least one of the valves is suitable for transmission through the fluid flow when the flow is exerted on the valve set pressure. A qualified expert in this field may is becoming a given pressure on the basis of conditions which will be used by the device. In one embodiment, the device according to this invention contains at least one filter for filtering of the fluid solid particles having a predetermined size before the fluid medium will flow through one or more valves. A qualified specialist in this field can be set to the specified dimensions on the basis of conditions in which the device will be used. In one embodiment, the device according to this invention contains at least one rupture disk designed to provide an output flow of fluid from one or more downhole tools under one or more specified conditions. A qualified specialist in this field can install the specified conditions based on the conditions in which the device will be used. In one embodiment, the device according to this invention contains one or more apertures that are designed to restrict the flow of fluid through one or more valves preset speed. A qualified specialist in the same field can pre-set the desired speed on the basis of conditions in which the device will be used.

Brief description of drawings

The present invention and its becoming the VA will be more clear when considering the following detailed description and the accompanying figures, which depict the following:

figure 1 is a schematic view of the node with downhole tools in a borehole, when this part of the site is a chain of logic valve for remote intervention;

figure 2 is a schematic layout view of the circuit logic valve for remote intervention used in the case involving a single descent-ascent to handle multiple zones for the purpose of initiating, for example, in hydraulic fracturing;

figure 3 represents a graph of the sequence of pressure before fracturing in the case of operation of hydraulic fracturing in many areas for one descent-ascent;

figure 4 represents the sequence of pressure after fracturing in the case of performing hydraulic fracturing in many areas for one descent-ascent;

figure 5 represents a schematic layout of one embodiment of an implementation of the logic valve for remote intervention.

Detailed description of the invention

The present invention will be described with reference to the different variants of its implementation. However, to the extent that the following description characterizes a particular option exercise or specific use of the invention, it is assumed that it accommodates the Deno illustrative purposes only and is not intended to limit the scope of the invention. On the contrary, the description is intended to cover all alternatives, modifications and equivalents of prisoners within the essence and scope of the invention defined by the attached claims.

The excitation of one productive interval usually requires in a particular order has been the sequence of events. Possible treatment for fracturing, in which use is driven by spiral tubing inflatable packer, clerk to reject the exciting flow of fluid, which is pumped into the perforations above the packer may include the following: the passage does not pressurized packer at the desired depth for the circulation of fluid along a spiral pipe; perforation; moving in the proper place equipment bottom of the casing; leaching chip rocks from their place of deposition; the installation of wedges; inflating the packer; equalization of pressure on the packer during inflation; overlapping path equalization; the agitation of the tank, opening the way for the equalization of pressure on the packer; deflating the packer; the liberation of wedges; leaching of rock fragments. In practice, each of the thirteen listed events must also occur auxiliary group of events required to ensure read what certain events, for example, the installation of the J-shaped locking boarding wedges requires lowering equipment bottom of the casing in a downward well, lifting this equipment on two feet (0,61 m) and its lowering in the borehole at two feet (0,61 m). Although this example illustrates the complexity inherent in the most remote operations, the execution of operations becomes even more complex if we consider the technique of supply associated with the running surface operations, to ensure the events in descending well. To ensure the events in descending the well, such that normally initiate and perform with the surface, use one or more of the following controls to hold in a borehole one of the following: 1) the tension and/or compression; 2) rotation; (3) injection into the well balls to seal the holes, that is “dropping balls”; 4) energy; 5) pressure.

Each of these five controls from the surface represents the complexity and limitations of remote intervention. Based on tension and compression, which is practiced in the industry, in the case of strongly deny walls (walls that are formed by drilling vertically and at various angles to the vertical), when power transmission from the surface of oborudovanie bottom of the casing may be partially or fully be weakened due to frictional contact between the coiled tubing and the walls of the casing. In addition, temperature changes in the tubing due to the passage of cold/hot stimulating fluid can change the force transmitted to the equipment of the bottom of the casing for energizing effect that leads to increased problems associated with susceptible to the load control device on the surface. Further, the equipment of the bottom of the casing shall be firmly attached to the walls of the casing during the operation of load control, because otherwise attached load can move the equipment to the bottom of the casing in the borehole up or down in relation to the set for the excitation interval and may cause damage to the deflecting device of the above mentioned equipment (hardware component of the bottom of the casing, which is tightly sealed against the wall of the casing). In addition, if you use the tension or compression to actuate the device downward wells, which varies in length when the load (for example, a sliding clutch), it is difficult, if you want a fixed length of cable passing through the expanding or shrinking the device.

The use of rotation, which is typically used in this industry, requires the transfer of torque (torsional movement) from which ernesti to the equipment of the bottom of the casing. For transmission of torque to the equipment of the bottom of the casing usually use a connected pipe [pipe of the strand sections of 9.1 m (30 ft)] due to its inherent mechanical rigidity. The following list shows the main disadvantages associated with this approach to control the equipment of the bottom of the casing: 1) require a substantial period of time to move the equipment to the bottom of the casing at a thousand feet up and down the borehole through the fixture and unscrewing a large number of pipe sections by 9.1 meters (30 feet); 2) if the pipe gets jammed, the communication with the hardware in the bottom of the casing is lost; 3) the steps required to use the connected pipeline, also require the use of expensive equipment for connecting and disconnecting a large number of sections of such pipe; 4) due to what if the connected pipeline is constantly adding and removing sections 9.1 m (30 feet), the introduction of the electric cable through the center of the column of pipes impractical, so the electric actuation devices such as firing guns, impractical.

The dropping of the ball is performed by moving it from the surface to the equipment of the bottom of the casing through the spirally rolled pipe or connected to the first pipeline. When the ball reaches the equipment of the bottom of the casing, it seals the hole inside the instrument and ensures execution of events. Main disadvantages associated with the dropping of the ball are as follows: 1) reset the ball is usually a one-time irreversible event (during this process can be dropped balls of different sizes, but none of the actions for the equipment of the bottom casing made through this ball may not be repeated), thus the ability to perform a large number of excitations within one descent into the borehole is limited; 2) the introduction of errors, which is the source of man, for example, because the ball the wrong size, default reset ball reset ball at the wrong time; 3) the need to seal the ball in an environment contaminated by rock fragments; 4) potential complication if the piping system is the cable. Reset the ball has a different application involving remote access beyond actuate the equipment of the bottom of the casing, for example, for short-term sealing perforations in the casing pipe or for sealing holes in a permanent or temporary devices attached to the casing pipe or tubing for wells operation.

Use BU the new borehole electricity usually provide through waterproof insulated cable from the control center on the surface in a borehole equipment bottom of the casing. Such equipment is usually suspended and transported by means of a cable or suspended and transported through the tubing with the cable passing inside the pipes. Since electricity and liquid borehole incompatible, wiring diagram borehole is usually enclosed in a sealed airtight chamber. In the following list highlights some of the major limitations associated with the use of electricity to actuate devices borehole and to manage them: 1) damage to the seal or minimal leakage through the seal can easily lead device in a borehole in the off state, making it useless, or depending on the condition of the equipment of the bottom of the casing at the time of damage the instrument remains in the well in a tightly locked condition, which makes it useless; 2) usually require a large number of moving parts, since the electrical energy must be converted into mechanical energy (in limited spaces downhole tool), and then these parts are used to actuate other mechanical device that performs the desired operation in a borehole, which increases the statistical probability of damage; 3) loss of communication on the wire leading to the rabotosposobnosti tool what can lead to adverse consequences if the tool is rigidly locked in a borehole, when communication is lost; 4) air-filled sealed chamber with an electric circuit tend to the destruction of the hydrostatic pressure within the borehole; 5) if the use of one cable, you will have a slight chance of pulling up to the liberation of the equipment of the bottom of the casing, which may get stuck and be slightly jammed; 6) increased temperatures that are common to environmental borehole, have an adverse effect on the operational characteristics of the electrical device.

Of the five control pressure usually provides the best form of energy for control and actuation. All boreholes is fluid, so there is always a message through pressure between the equipment of the bottom of the casing and the surface, even during unstable conditions. Since pressure is also a source of energy, there is always the possibility of working devices, driven by pressure, even in unstable conditions. Significant complexity associated with devices controlled and driven by pressure, is a case in point, causes the speaker defined the need for separate pressure control equipment bottom of the casing and the natural pressure available inside the tank, or pressure associated with the execution of individual operations within a borehole, such as hydraulic fracturing.

The above example illustrates excitation difficulties associated with typical remote intervention (thirteen events, with each event contains a number of supporting events). The provision of these events in a borehole based on the expert execution of the corresponding group maneuvers on the surface, selected from the above-mentioned five elements. The combination of intervention complexity with operational problems and limitations associated with five controls from the surface, highlight the difficulties that may arise in the program of remote access due to a number of events in a borehole, the logic associated with events, coordination of events by time and nature of the maneuvers on the surface, are required to perform each event in a borehole.

The disadvantage associated with the modern technology of remote access, refers to a structural basis for the creation of downhole tools (snap-in bottom of the casing). Standard practice in the industry, based on ring structures to create systems that solve a need for the absolute in a remote environment. Ring design for control valves usually limit the working mechanisms of the valve annular area and mainly consist of a series of interconnected sleeves that slide relative to each other when the load (load under the action of pressure by clearing the ball plus the pressure under the action of the spring by direct movement etc). Usually in the case of systems based on the ring you want excited seals (seals with pressure on him) passed by channels (holes) to ensure the well desired event. For example, assume that the pipe has a hole and the outside of the pipe acts specified pressure. Also assume that the outer tube has an inner tube of smaller diameter, which can slide inside the outer tube, and assume that its length is approximately 25.4 cm (10 inches). The pressure outside the pipe can be isolated from the pressure inside the pipe by placing seals on both ends of the inner movable tube and centering in the hole. When between the outer side and the inner side of the outer tube has a pressure drop, the seal material will be powered in the small gap between the two pipes and to prevent the passage of fluid. To provide the th relationship between the outer side and the inner side of the outer pipe, the inner tube should slide in the axial direction up until one of the seals will not pass over the holes in the outer tube. The sealing material is usually performed and soft like rubber. The passage of these seals, excited by pressure through a harmful effect on the reliability of the device, because the soft material of the seal can be easily damaged by the edge of the hole, and can be easily damaged by a surge of fluid through unfettered seal when contacted by pressure. Though the circular design provides passing through the center of the device, it inevitably excludes the use of proven equipment of higher quality, which is not based on the design of the ring.

In one of the embodiments of the present invention has a system of valves, which operates in a predetermined range of pressure, with the valves installed in such a way as to provide a series of events through downhole tools when exposed to the pressure valve. The valve system conceptually similar to the electric circuit. Electric circuit design to solve logical series of tasks through joint mounting a structure to a large number of components, each of which is s performs one simple function (e.g., resistors, capacitors, transistors, diodes, etc), and the supply voltage to them. Similarly, in one of the embodiments of the invention, the valve system can be programmed to solve logical series of tasks through joint installation on a particular system of multiple valves for a specific purpose (for example, a large number of plug valves to perform each one of them functions, such as check valves, relief valves, selective valves, safety valves, trigger speed, controlled bypass valves, regulators, back pressure regulators, etc. and the impact of pressure on them. Characteristic of the valve system the ability to develop and execute many operations in remote locations via the supplied pressure creates unique opportunities and allows you to provide remote access.

The present invention allows to facilitate the solution of problems of remote access resulting from multiple events in a borehole, the logic associated with these events, coordination of events over time, and the nature of the maneuvers on the surface required to ensure that each event in a borehole. Compared to modern technology, which requires the presence on the surface of skilled about what the providers, making the decision and committing the necessary actions to ensure each event in a borehole, in this invention created the methods and devices which reproduce the decision-making process by the operator, on a surface, or a team of operators, thereby reducing the potential for operator error.

The valve system restricts or eliminates the need for an operator at the surface of the logic control through the use of axial movement, rotation, reset the ball, or electrical impulse. In addition, since the valve system based on the pressure, the invention creates a simplification and provides the technology for such processes remote access, which is limited by the shortcomings of those approaches regarding the management, which are not based on the action of pressure, for example, in the case of operations in deviated and horizontal boreholes.

Various embodiments of the present invention allow you to apply a special valve system, which provides the opportunity for independent decision logic programmed groups of tasks in a proper manner and in due time, by pressure at a certain pressure range. Used herein, the term “task” means any way the second event, required by the program access to the underground formation. Examples of tasks include inflating the packer, the execution of drilling operations, acid treatment, fracturing, the alignment of the pressure sealing device borehole, the operation of the pump under pressure, the installation of the bridge tube, the operation of the mechanical device (wedges, decentralization, compressible packer, capture, cutting tools, drill bits for drilling formations, valves, electrical switches etc) and electrical devices (switches, firing punch to selectively postrelease etc). Therefore, through various embodiments of the present invention potentially enables the proper performance and simplify multiple remote access technologies.

A device associated with a specific embodiment of the invention, described below, is called a logical valve for remote intervention. The main, but not exclusive logical function valve for remote intervention is remote operations equipment bottom of the casing, which can be used to isolate the specific segment of the borehole for the purposes of remote access, such as fracturing, acid is processing, establishing the exact location of the treatment fluid, insulation, water insulation gas, re-completion of existing wells by perforating and stimulation in a borehole locations, different from the existing finish, and diagnostics borehole (e.g., isolation, sampling and analysis of fluid under pressure in selected areas).

Made logical valve for remote intervention, which is subjected to summary trials relating to remote operations equipment bottom of the casing, enabling the excitation of multiple zones during a single run, climb, and operations to isolate the borehole using an inflatable packer, driven spiral pipe.

Figure 1 presents a simplified system node with the downhole tool, which uses logical valve for remote intervention. Borehole 1 is the casing 2, which is fixed in the proper place by means of cement 3. Between the drilling well 1 and the subterranean formation 4 through perforations 6 are provided hydraulic communication through the casing and cement. Node 5 borehole deploy using deploys tools, such as a helically folded pipe 7, passes into the well 1. Helix is folded about line 7 provides conclusions to the logical valve 10 for remote intervention of the fluid flow and pressure. Wash and recirculating flow is supplied from the drilling tool 24, which may be an auxiliary component logic valve 10 for remote intervention. Below the valve 10 is connected inflatable packer 8. Between the filters 13 and 14 through the mandrel 79 provide a stable passage of fluid. Fluid can pass between the filters 13 and 14 in any direction. Below the wedges 25 are connected perforating system 9 for electoral postrelease. Node 5 borehole can be deployed using reasonable means, including connected piping, traction devices or wire, not limited to coiled tubing. The annular space 11 is the space between the casing pipe 2 and node 5 borehole, as well as between the casing tube 2 and the tool 7 deployment. In the node with the downhole tools may be included and other tools.

For excitation in many areas for one descent-ascent an example of a possible sequence of events provided by node 5 borehole, may include the following: 1) the passage of the deflated packer to a predetermined depth when the circulation of the fluid in a spiral sternotomy pipeline; 2) perforation; 3) moving the equipment to the bottom of the casing below the perforations; 4) installation of the wedge is s; 5) leaching of rock fragments from the installation of the packer; (6) inflating the packer; 7) the alignment of the pressure on the packer during its inflation; 8) the overlap path equalization of pressure after inflation of the packer; 9) program execution excitation; 10) the opening of the alignment holes before deflating the packer; 11) the leaching of any residual material after excitation of the location of the packer; 12) deflating the packer; 13) exemption wedges; 14) the circulation of the fluid in a spiral sternotomy pipeline during the movement of the packer.

Logic valve 10 for remote intervention mainly consists of a combination of different plug valves, which perform logical control fluid medium, as a function of the pressure applied. In this description, the plug valve is defined as a single or with special purpose independent valve, which can be easily inserted into the cover cavity or partially covering the cavity and removed from it, or attached to the pressure source. Plug valve can be screwed into the cavity or pressure source, or can be installed in the cavity and imprisoned in it by other means, for example by means of a threaded cap or through the junction to the surface of the adjacent shell.

Plug valves used in logiteck the m valve 10 for remote intervention not limited by the disadvantages of the design-based rings. For quality control can be a simple laboratory test is a separate plug-in valve, which can be performed prior to installation of the valve in the downhole tool, and it is a means of guaranteeing the functionality and reliability of the system. Since each valve solves a specific task (task), for which it was designed, the valve system will operate to ensure repeatability and reliability no matter how complicated sequence of events.

Logic valve 10 for remote intervention solves several of the following main tasks: 1) providing circulation during the passage of the tool into the well; 2) inflation of the inflatable packer; 3) ensuring flow with stable pressure up the well through the tool, regardless of whether more pressure under the packer than above the packer; 4) equalization of pressure from above the packer to the space below the packer when the inflation of the packer; 5) seal the well after the packer is fully inflated; 6) provision of washing when setting the packer; 7) provision of a flushing flow when the packer deflated; 8) ensure that the deflation of the packer; 9) protection against inflation of the packer under pressure.

General view of the logical circuit valve for remote the frame of the intervention are presented in figure 2. All valves shown in figure 2, for example valves 21-23, 26, 31-36 and 41-43, are plug valves. The valves located within blocks, indicated by the dotted line, form a family of plug valves that solve a specific task. For example, an aggregate of 20 tools for washing contains a set of four valves - pressure relief valve 21 is triggered by the speed of the first check valve 22, the second check valve 23 and the third check valve 26, which actuate the flushing tool 24. The subsequent discussion refers to the work of each family of plug valves. It is accompanied by a discussion of the sequence of operation of the valve of the site as a whole.

Set of 20 tools for washing ensures the flow of the spirally folded pipe 7 to the annular space 11, but restricts flow from it to the pipeline 7. The tool 24 for flushing operates in discrete interval pressure and helps to wash away the debris of rocks around the packer 8 before and after inflation of the packer, as well as circulation within the movement and/or movement of a fluid medium (media) up or down the borehole. Set of 20 tools for washing may also provide additional the fluid for fracturing and/or the fluid to mind is nisene accumulation chip rocks on the upper part of the well site during the excitation process. The safety valve 21, the trigger speed is a system based on spring and is held open by the force of the spring, until it reaches a sufficient pressure drop when the flow passes through the valve to compress the spring and close the valve. After this, the valve is held closed under the action of differential pressure. The area of flow through the valve, the spring and the displacement of the piston is chosen in such a way as to ensure the passage through the valve flow with the desired speed before it reaches the closing pressure. The valve operates based on pressure differential, thus its description is not dependent on static pressure (dependent on depth). The first check valve 22, the second check valve 23 and the third check valve 26 are redundant group of valves, which ensure that the flow direction will be limited direction from the spiral pipe 7 to the annular space 11. These check valves limit cross-contamination between clean controlled fluid medium spiral collapsed pipeline and uncontrolled fluid medium rings. The filter 15 provides a relatively large area of a stream to facilitate the removal of the compacted proppant or Oblak is in rocks from the area around the equipment of the bottom of the casing. In addition, the filter 15 provides protection against malfunction due to the invasion of the fluid contaminated with rock fragments, coiled tubing when the failure of the valves 22, 23 and 26.

A collection of 30 of the valve to inflate the packer provides controlled inflation and deflation of the packer in a discrete interval pressure and contains filters 37, is used to inflate the packer, the first bypass valve 31, the aperture 39 to inflate the packer, the first check valve 32, the second check valve 33, the aperture 38 for deflation of the packer, the second bypass valve 34, the third check valve 35 and the fourth check valve 36. For various reasons it is undesirable to inflate the packer pressure in the same range, in which there is pressure to actuate the flushing tool. One of the reasons is that the use of circulating fluid within the tool movements (lifting operations) will lead to inflation of the packer, so it will be created an obstacle to the tool movement. The second reason is that controlled flushing when the deflated packer would be impossible. Packer inflate pressure at discrete intervals, starting pressure, which is greater than the pressure cutoff wash tool. The filters 37, is used to inflate the packer, the exhaust gas is iniciat particle size, introduced into the family of 30 valves for inflating the packer during the process of inflation. The first bypass valve 31 is used to hold the packer in the pressurized state until the desired opening pressure or “cracking”. Once exceeded a preset cracking pressure, the packer is inflated to a pressure equal to the pressure in the spiral pipe negative pressure reinstall (usually equal to the cracking pressure). Thus, the pressure inside the packer will be less than the pressure in the spiral collapsed pipeline, by a specified amount. Exciting action performed while maintaining the pressure in the pipeline in the range between the maximum inflation pressure of the packer, created in the pipeline, and the pressure of the packer. This pressure interval is nominally equal to the amount of pressure “cracking”, defined by-pass valve. Aperture 39 to inflate the packer limits the flow rate to the manifold 8 to the possibility of controlled and uniform inflation of the packer 8. For deflation of the packer using a redundant pair of check valves is the first check valve 32 and the second check valve 33, and the aperture 38 to bypass the valve and inflate the packer, that is, the first bypass valve 31. For inflating the two check valves 32 and 33 are closed, but within Suwan the I two valve open, as soon as the pressure in the spiral pipe falls below the pressure of the packer. Aperture 38 for deflation of packer limit the flow rate when deflating to protect the valves 32 and 33 from the harmful effects of high-speed fluid flow. The pressure drop in helically rolled piping to hydrostatic pressure provides complete deflation of the packer. Deflation perform due to elastic properties of the packer element and this can be facilitated by the application of pressure in the ring and/or the discharge of hydrostatic pressure in the spiral collapsed pipeline through the introduction of a fluid, having a density less than the density of the fluid ring, for example gas. Three other valve together 30 to inflate the packer provide protection against excessive inflation of the packer. If the pressure inside the packer is increased to a value higher than the given pressure fluid for inflating the packer will be directed to the ring through the bypass valve 34, the third check valve 35 and the fourth check valve 36. In addition, check valves 35 and 36 create a redundant system, which prevents flow from the annular space 11 to the packer 8.

Set of 40 equalizing valves forms a driven pressure means equalization of pressure difference to papakura and includes controlled bypass valve 41, the first check valve 42, the second check valve 43 and the rupture disk 44. The alignment is performed during or after the process of inflating, in order to protect the packer element and the string of pipe from the potentially dangerous effects of transverse flows from zone to zone. Examples of these potentially harmful effects are buckling spiral collapsed pipe when inflated packer occurring due to the movement of fluid formation up through the borehole in the interval with a cross-over, sandblasting effect on the packer element when it is blowing due to the passage of high speed particles contained in the fluid, between the limiting wall and partially deflated packer, and unwanted surge load deflation occurring due to the friction loss of containment under the influence of the pressure difference acting on the surface area of the normally pressurized packer. Controlled bypass valve 41 is used to open a path of flow and supply pressure through the manifold 8. The spring is used to maintain a normally open state. The creation of a predetermined pressure in the spiral collapsed pipe leads to the compression of the spring and close the valve. After inflating the packer pressure at the packer level, while the packer element will not be fixed at will restrict the selected walls, then the valve is closed when a predetermined pressure in the spiral pipe. After deflation of the packer valve opens when a predetermined pressure in the spiral pipe, and it will be possible pressure equalization when the item comes with the bounding walls and is deflating. In the particular case when the excitation process occurs above the packer, a redundant pair of check valves 42 and 43 bypasses controlled bypass valve 41 and ensures that below the packer before and after the excitation process will not develop high blood pressure. Check valves 42 and 43 may be replaced by a solid metal ingots, if it is assumed that the excitation process must occur below the packer. Rupture disk 44 provides a mechanism for deflation of the packer 8 under abnormal operation. Disruption of the normal operation mode, which can be used rupture disk 44 may be a situation, when the pressure in the casing pipe 2 (Fig 1) above and/or below the packer 8 is less than the hydrostatic pressure inside the spirally folded pipe 7, and the reduction of hydrostatic pressure in the spiral pipe by forcing the less dense fluid (gas) in the pipeline 7 is impossible due to the blocking of the borehole or violation of work the valves, which prevents the passage of the flushing flow of the spiral pipe 7 to the annular space 11. The destruction of the burst disk 44 provides an open path flow and supply pressure between places of action pressure above and below the packer 8 inside the casing 2. After the destruction of the burst disk 44 is blowing, when a stretched elastomer covering the packer 8, pushes the fluid to the packer through the rupture disk 44 and the area above and below the packer 8.

Because each set of valves operates in accordance with the established interval of pressure, and valves that make up the system, interchangeable, operation and/or the sequence of operations can be modified to fit the needs of any particular application. In one of the embodiments of the invention the device is created, which use the system with push-fit valves constructed in such a way that the tool borehole can provide a logical grouping of events by the application of pressure.

The use of this device may include a perforation interval, lowering the node with downhole tools below perforations, the installation of the inflatable packer, the gap formation through the injection of proppant contained in the fluid through the annular space, is the release of the packer and moving it up through the borehole to the next location of the perforation. The main problems associated with this opportunity are inflating the packer in the area of the borehole, in which the presence of transverse flow up the well can lead to helical buckling of the coiled tubing, removing sand from the upper part of the packer after fracture of the reservoir and the pressure equalization above and below the packer to the deflation of the packer.

In the above example, suppose that the manufacturer of the inflatable packer serves to inflate the packer to a pressure of about 34 MPa (5000 psi), and the estimated maximum pressure fracturing is approximately 41 MPa (6000 psi) (falling sand). To meet the requirements are assumed to be below pressure to actuate relating to the three sets of valves: 1) the safety valve 21, trigger speed, the aggregate 20 drilling tools are designed in such a way that closes when the differential pressure of approximately 10 MPa (1500 psi; 2) the bypass valve 31 together 30 of the valve to inflate the packer is designed in such a way that opens when the differential pressure of about 24 MPa (3500 psi); 3) controlled bypass valve 44 aggregate 40 equalizing valves are designed in such a way that closes p and the differential pressure between about 34 and 52 MPa (between 5000 and 7000 pounds per square inch). For this particular application, the system includes check valves 42 and 43. Since the maximum expected pressure is about 41 MPa (6000 psi), and pressure relief valve, triggered by the speed configured for actuation (opening or closing) at a pressure drop of approximately 10 MPa (1500 psi) between the spirally rolled tubing and the annular space, the pressure in the spiral collapsed pipe shall be stored so that it was higher by about 52 MPa (7500 psi)[about 42 MPa (6000 psi) plus about 10 MPa (1500 psi)]to prevent opening of the safety valve and to ensure the protection of spiral-folded pipeline from destruction. Therefore, it can be assumed that the pressure in the pipeline during the operation of fracturing will be maintained approximately equal to 59 MPa (8500 psi). Since the maximum anticipated pressure of the packer is approximately 34 MPa (5000 psi), the estimated burst pressure burst disk 44 is approximately 41 MPa (6000 psi).

The process of actuation by the pressure of the graphically presented in figure 3 and 4 as a function of time. Figure 3 presents graphy is, illustrating the sequence of effects of pressure before fracturing to perform one descent-ascent operations hydraulic fracturing in a large number of zones. The graph in figure 3 includes the ordinate 310 characterizing the pressure in the spiral collapsed pipe, measured in MPa, the ordinate 320 characterizing the pressure of the packer in MPa, the abscissa 315 characterizing the time increases from left to right), line 330, which characterizes the change in pressure in the spiral pipe, line 340, which characterizes the pressure of the packer, the point 345, characterizing the pressure in the spiral pipe when the alignment hole is completely closed, the point 346, characterizing the pressure of the packer, when the alignment hole is completely closed, the interval 350 characterizing the pressure during the drilling tool, the interval 360 characterizing the pressure for actuating the controlled bypass valve, and the interval 370 characterizing the pressure in the course of execution of works on fracturing. 4 shows the sequence of impact pressure as a function of time after rupture of the reservoir due to one-descent-ascent operations fracturing. In figure 4, the graph has an ordinate 410 characterizing the pressure in the spiral of the pipeline is the ode in MPa, the ordinate 420 characterizing the pressure in the packer in MPa, the abscissa 415 characterizing the time increases from left to right), line 430, which characterizes the change in pressure in the spiral pipe, line 440, which characterizes the change in pressure in the packer, the point 445, characterizing the pressure in the spiral pipe and the pressure in the packer, when the alignment hole becomes fully open, the interval 450 characterizing the pressure within works fracturing interval 460, characterizing the pressure during operation controlled by-pass valve, and the interval 480 characterizing the pressure during the drilling tool.

Referring to figures 1 and 2, we note that the work begins by lowering the downhole node 5 from the surface to the specified interval, the fluid medium is circulated through the wash tool 24. Circulation provide through discharge the fluid in a spiral rolled pipe 7 with speeds that limit the pressure drop through the logical valve for remote intervention values between 0 MPa and about 10 MPa (0 to 1500 pounds per square inch). In this pressure range the set of 30 valves for inflating the packer is closed, and the totality of 40 equalizing valve is open. When perforating system 9 for election PR is streliany reaches the desired depth, release one group firing guns. With continued flow through a set of 20 wash tools to remove rock fragments remaining after punching, the downhole node 5 is lowered below the perforations to the desired installation location of the packer and set the wedges 25. The higher pressure drop in the logical valve for remote intervention above about 10 MPa (1500 psi) closes the safety valve 21, trigger speed, and to stop flow jetting tool 24. Throughout the operating cycle check valves 22, 23 and 26 together 20 drilling tools prevent flow out of the ring 11 in spirally rolled pipe 7. In the pressure range from about 10 to 24 MPa (1500 to 3500 pounds per square inch) set of 20 drilling tools and a set of 30 valves for inflating the packer is closed, and the leveling set 40 is open. At about 24 MPa (3500 psi) bypass valve 31 together 30 of the valve to inflate the packer opens and begins inflating the packer. Fluid passing to a collection of 30 of the valve to inflate the inflatable packer is filtered as it passes through the filter 37. Aperture 39 allows you to specify the velocity of the fluid medium, passing to the packer during its inflation. Leveling the set of 40 remains open during the inflation in the range of pressure from about 24 to 34 MPa (3500 to 5000 pounds per square inch), after which the packer is tightly sealed on the sides of the casing, and operated bypass valve 41 leveling the aggregate 40 begins to close. Throughout the operating cycle check valves 42 and 43 leveling aggregate 40 prevents the occurrence of high pressure below the packer. The increase in pressure in the spiral pipe is about to 59 MPa (8500 psi) causes the pressure in the packer 34 MPa (5000 psi). The pressure drop in helical pipe from about 59 to 55 MPa (8500 to 8000 pounds per square inch) leads to the fact that the pressure inside the packer remains approximately equal to 34 MPa (5000 psi) and provides damping pressure to attenuate pressure fluctuations at the surface.

At this point the operation is fracturing. Carried fluid medium propping material is injected through the annular space between the spirally rolled pipe and casing pipe in the perforation above the inflated packer. After the operation is complete fracturing has a probability above the packer and below perforate the accumulation of settled riving material, and the probability of imbalance of pressure on the packer. The accumulation of settled riving material occurs, if the strength of the gel is sufficient to guarantee that all particles follow the streamlines in the perforation. Any particles that are unable to follow the streamlines will be discarded in the area below the lowest perforation and thus deposited on the packer. Propping material can also accumulate on top of the packer, if the gel fracturing carrying propping material may collapse within a borehole under abnormal operating conditions. The pressure imbalance occurs, if below the packer isolated to one area of low pressure. The area with high pressure under the packer can be easily aligned when the operation completes fracturing through check valves 42 and 43 levelling collection.

After surgery fracturing pressure inside the packer is approximately 34 MPa (5000 psi)and the pressure in the spiral pipe is approximately 55 MPa (8000 psi). When reducing the pressure in the spiral pipe up to 7500 pounds per square inch starts to open controlled bypass valve 41 leveling the aggregate 40. It provides communication through the packer through the passage of fluid the environment and pressure transfer. This way pressure equalization remains open when the rest of the operation. Within the range of pressure in the spiral pipe from about 59 to 34 MPa (8500 to 5000 pounds per square inch) packer remains inflated pressure of about 34 MPa (5000 psi) and a set of 20 drilling tools remains closed. When the pressure in the spiral pipe falls below about 34 MPa (5000 psi)begins deflating the packer through the check valves 32 and 33 together 30 to inflate the packer. To protect the check valves 32 and 33 from potential damage resulting from the ejection of the fluid with a very high speed when deflating the packer, the diaphragm 38 will limit the speed of the fluid flowing from the packer, to an acceptable level. Below the pressure in the spiral collapsed pipeline, approximately 34 MPa (5000 psi) pressure in the manifold follows the pressure in the spiral pipe. When the pressure in the spiral collapsed pipe about 10 MPa (1500 psi) relief valve 21, trigger speed, a set of 20 drilling tools starts to open. Accumulated disjoining material washed out from the pressurized packer by reducing the pressure in the spiral pipe to the match, which can achieve the desired flow rate through the washing tool, in this case presumably 7 MPa (1000 psi). At about 7 MPa (1000 psi) packer remains inflated, thus flushing operation inevitably leads to the displacement of the riving material up through the borehole and from the packer. Seems a bargain leaching of accumulated sand at the deflation of the packer and the pressure drop in helical pipe to 0 MPa (0 psi). This allows deflation of the packer. After the packer deflated, the pressure in the spiral pipe is increased to a level that allows you to achieve the desired flow rate through the wash tool. The increase in pressure in the spiral pipe does not re-inflating the packer, as the bypass valve 31 together 30 to inflate the packer will not be re-opened until the pressure in the spiral pipe reaches about 24 MPa (3500 psi).

After the node with downhole tools appropriately released from the layer of sand and the packer deflated, set the pressure in the spiral pipe, constituting approximately from 0 to 10 MPa (0 to 1500 pounds per square inch)to provide circulation. After that, the node sainnyenhaste move to the next place of punching. The above cycle is repeated as many times as required by the program excitation. Then the node with downhole tools raise to the surface for installation of the new group firing guns for election postrelease intended for the following groups of intervals, or it is removed from the borehole, if the program is completed.

In case of such events, when the packer cannot be deflated, the pressure in the spiral pipe can be increased up to 65 MPa (9500 psi) [which leads to the creation of pressure in the manifold, approximately amounting to 41 MPa (6000 psi)], which results in the destruction of the burst disk 44 to deflate the packer.

Figure 5 shows a variant implementation of the device according to the present invention. Logic valve 10 for remote intervention consists of five nodes 50, 51, 52, 53, 54, in which there are various plug valves. Five nodes are connected to each other in the order presented on figure 5, that is, 50 to 51, 51 52, 52 to 53 and 53 to 54. Can be used by any acceptable means of connection nodes. After Assembly, each node communicates with the next node through the insulating pressure connection nipple 63, 64 and 65 within the bounding spaces connecting bushings 59, 60, 61, 62 nodes. The stub klapa is s can be easily replaced by detaching at the appropriate place between nodes and installation pre-tested valve. Provide connectivity via cable throughout the tool. Figure 5 shows the fluid 100 in a spiral collapsed pipe, the flushing fluid medium 110, fluid 120 for inflation and deflation of the packer, leveling fluid 130, fluid 140 in the excessive inflation of the packer, the cable 150 and the electrical wire 160.

The node 50 is attached to the connection 12 spirally folded pipeline, and it contains the flushing tool 24, which produces a jet (figure 1). The channel 66 for fluid drilling tool passes from node 51 through an insulating pressure connection nipple 64. Wash fluid exits the node 50 through the filter 15 (figure 2). The node 50 is connected to node 51, and isolates the pressure spirally folded pipeline passed through the floating channel 75, the pressure in the annular space 11 through the connecting sleeve 59. Node 51 contains triggered by speed safety valve 21 chain drilling tool, check valves 22, 23 and 26, the slot 57 to disconnect the cable channel 67 for flushing fluid, and a channel 55 for electric wire and the fluid spiral pipe. The channel 55 is connected to a node 52 through an insulating pressure connection nipple 65. Standard electrical cable for oil field (electric line) is robotic through the hub 50 and is attached to the breakaway socket 57 in the node 51. The continuity of the electric circuit is maintained by securing the continuation of 56 electrical wire electrical wire electrical lines 58. Node 51 is connected to node 52 and isolates the pressure 76 wash fluid from the pressure in the annular space 11 by means of the coupling sleeve 60.

Node 52 contains transitional coupling 68 for changing the direction of the fluid flow drilling tool, as well as channel 69 for electrical wires and fluid spirally folded pipeline. Node 52 is connected to node 53 and isolates the pressure of the fluid spiral collapsed pipe in the channel 69 from the pressure in the annular space 11 by means of the coupling sleeve 61.

Node 53 contains a filter 37 to inflate the inflatable packer bypass valve 31 to inflate the packer, the aperture 39 to inflate the packer, dual check valves 32 and 33 for deflation of the packer, the aperture 38 for deflation of the packer, the bypass valve 34 excessive inflation of the packer with dual check valves 35 and 36, the channel 71 for electrical wires and fluid coiled tubing and pressure channel 70 to the fluid during inflation of the packer. The channel for the fluid packer communicated with the node 54 through an insulating pressure connection nipple 63. Node 53 is connected to node 54 and isolates the pressure spirally rolled the first pipeline in the channel 71 of the pressure in the annular space 11 by means of the coupling sleeve 62.

Node 54 contains rupture disk 44, controlled bypass valve 41, the channel 74 for equalizing the fluid and the channel 77 to align upstream with dual check valves 42 and 43. Directly to the node 54 can be connected to the mandrel of the packer and an inflatable packer element. Fluid for inflating the packer passes directly to the packer through the channel 73. Channel 72 for electrical wires and fluid spirally folded pipeline goes from node 54 in the insulating pressure pipe 78 channel spirally folded pipeline, which passes through the center of the mandrel 79 and further lower ends of the mandrel 79. The channel 74 for equalizing the fluid flows through the annular space formed between the inner side of the mandrel 79 and the outer side of the pipe 78 for passage of electrical wires and the spiral channel of the collapsed pipe. Provide equalizing passage of fluid through the filter 13 node 54 through the annular space formed between the mandrel 79 and pipe 78 for passage of electrical wires and fluid spirally folded pipe, and through the filter 14 (figure 1)attached to the bottom part of the mandrel 79. In one embodiment, one or more filters 13, 14 and 15, all of which are shown in the drawings, are filters of the twisted wire with the article is singing filtering from 100 to 150 microns.

In another embodiment of the invention the logic valve for remote intervention can be constructed with continuous pressure spiral collapsed pipe below the device, so it can be connected to another driven by the pressure device (or other device-based schemes), for example, covering the packer system. In another embodiment consistent time events can be achieved through the use of flow through the aperture, providing a filling one end of the battery, which moves the floating piston from one end to the other end to the actuating lever or switch. In another embodiment, similar to the electrical circuit can be constructed Cabinet panel valves to accommodate a large number of plug valves. The panel for the placement of the valves may be designed so that the various valves can be installed with providing operational flexibility, so inside the case of one instrument can be programmed in any number of sequences of events in a borehole (program initiation).

In another embodiment, the logical circuit valve for remote intervention, driven by pressure, also mo is et to be used for remote electrical device (s) or chain (chain), or to control these devices or circuits that may be associated with a command base cable, or remote electrical device (s) or chain (chains), and to manage such devices or circuits to which the energy is served in a remote location and do not require assistance by means of a cable. This operation can be performed in a given interval (intervals) the sequence within the actuation pressure. For example, during pressure during the intervention, when reached a certain pressure, may be provided with a discharge excited for electricity shooting drills designed to selectively postrelease.

In another embodiment, the line pressure of the packer in a logical valve for remote intervention may be connected with a controlled by-pass valve (instead of line pressure spiral collapsed pipe, as shown in figure 2). This allows full opening controlled by-pass valve up until the packer is not created enough pressure to close it. The pressure in the manifold will be created only after it is planted on the sides of the casing. After this controlled bypass valve may be closed when the pressure of the packer note the RNO 10 MPa (1500 psi). The application of the present invention is not limited to these examples. Open the valve system can be used for different sequential event groups while applying pressure to the valves, including, but not limited to, the actuation of the packer, the pressure equalization, the actuation of the flushing of the fluid flow, the operation of the perforating device, the actuation of the wedges, the actuation cable, actuation of the electric device, the actuation of the measuring device, the actuation device for sampling, actuation means for deployment of the equipment, the actuation of the engine borehole, the actuation of the generator, the actuation pump actuation communication system, the injection of the fluid, remove the fluid, heating, cooling, actuation of the bridge tube, the actuation tube cracks, actuation of the optical device, the release of the equipment of the bottom of the casing string, the drilling operation, the cutting operation, the expandable tubing, expandable end and the actuation of mechanical devices. For qualified professionals in this industry will be the obvious many other possible applications of the present invention.

The above description relates to specific embodiments of the invention, intended to illustrate the invention but not to limit its scope. For qualified professionals in this industry will be obvious that for the purposes according to this invention in its functions will be many equivalent modifications and variants not specifically mentioned in the above description. It is assumed that all such modifications, variations, alternatives and equivalents must be within the essence and scope of the present invention, which is defined by the attached claims.

1. System containing two or more valves, each of these valves is adapted to act independently in a predetermined range of pressure, with two or more valves configured to run independently of the group of successive events through one or more downhole tools based on the pressure during the application of pressure fluid to two or more valves.

2. The system according to claim 1, in which at least one valve is a plug valve.

3. The system according to claim 2, in which at least one of the plug-valve is a plug valve one destination.

4. The system according to claim 1, in which less is th least one valve is an annular valve.

5. The system according to claim 1, in which the event group selected from the group consisting of actuation of the packer, the pressure equalization, the actuation of the flow of flushing fluid, the operation of the perforating device, the actuation of the wedges, the actuation cable, actuation of the electric device, the actuation of the measuring device, the actuation device for sampling, the actuation means of the deployment of the equipment, the actuation of the downhole motor, the actuation of the generator, the actuation of the pump, the operation of the communication system, the injection of the fluid, the fluid removal environment, heating, cooling, actuation of the bridge tube, the actuation tube cracks, actuation of the optical device, the release of the equipment of the bottom of the casing, a drilling operation, the operation of the cutting operation with the expandable pipeline operation with the expandable end and the actuation of mechanical devices.

6. The system according to claim 1, in which the valve is capable of powering one or more remote electronic devices that are associated with the command base cable.

7. The system p is 1, in which the valve is capable of powering one or more remote electronic devices with energy in a remote location without a cable.

8. The system according to claim 1, in which at least one of the valves is designed to provide a flow of fluid through it in one direction only.

9. The system according to claim 1, in which at least one of the valves is intended to provide for the interruption of the passage through it of the fluid flow, when the flow reaches a preset speed or acts on the valve set pressure.

10. The system according to claim 1, in which at least one of the valves is designed to allow the passing through of the fluid flow when the flow acts on the valve set pressure.

11. The system according to claim 1, containing at least one filter designed to filter solid particles having a given size from the fluid before passage of the fluid flow through one or more valves.

12. The system according to claim 1, containing at least one rupture disk designed to allow flow of fluid from one or more downhole tools under one or more specified conditions.

13. The system according to claim 1, containing one or more diaphragms, p is jednoznacnih to restrict fluid flow through the system to the desired speed.

14. The system according to claim 1, containing one or more apertures that are designed to restrict the flow of fluid through one or more valves to a predetermined speed.

15. The way of punching and processing multiple intervals of one or more subterranean formations traversed drilling the well that contains the following stages:
a) deploying equipment bottom of the casing from the pipe string within the borehole, while the equipment of the bottom casing has a perforating device and the sealing mechanism;
b) the use of a perforating device for perforating at least one interval of one or more subterranean formations;
C) the installation in a certain position of the equipment the bottom of the casing string within the borehole and actuation sealing mechanism to provide hydraulic seals below at least one of the perforated interval;
g) the discharge of the processing fluid down the annular space between the casing pipe and the drill hole and the perforation created by perforating device, without removing the perforating device from the borehole;
d) disabling the sealing mechanism;
e) repeating steps (b)-(d)at least one additional interval of one or NESCO is gcih underground formations;
in this case, at least one of the stages is performed through a system of valves that operate in a given interval pressure and ensure the execution of the abovementioned stages on the basis of effects on the pressure valve.

16. The method according to item 15, wherein performing additional stages, which are selected from the group consisting of leaching of rock fragments around the sealing mechanism, the alignment of the pressure sealing mechanism, providing electrical communication through the sealing mechanism.

17. Device to perform a group of consecutive events through one or more downhole tools, containing a combination of two or more valves located inside the nodes, where one node connects to another node through an insulating pressure connection and in which the combination of two or more valves independently performs a sequential group of events by one or more downhole tools based on the application of pressure fluid to the combination of two or more valves.

18. The device according to 17, in which the valves are plug valves located at the nodes.

19. The device according to 17, in which the message pressure is provided between the valves and between nodes by isolating the pressure connections.

21. The device according to 17, in which at least one of the valves is designed to ensure the passage through it of the fluid flow in one direction only.

22. The device according to 17, in which at least one of the valves is intended to provide for the interruption of the passage through it of the fluid flow, when the flow reaches a preset speed or when the valve operates the set pressure.

23. The device according to 17, in which at least one of the valves is designed to ensure the passage through it of the fluid flow when the flow is exerted on the valve set pressure.

24. The device according to 17, containing at least one filter designed to filter solid particles having a specified size from the fluid before passage of fluid through one or more valves.

25. The device according to 17, containing at least one rupture disk designed to ensure the passage of the fluid flow from one or more downhole tools under one or more specified conditions.

26. The device 17 that contains one or more apertures that are designed to restrict the flow of fluid through one or more valves to set the second speed.

27. Logical valve for remote intervention, containing at least one family of valves consisting of two or more different valves, configured to perform a group of consecutive events through one or more downhole tools when applying through the logic valve the flow of fluid under pressure, the valves indicated at least one family of valves adapted to independently run pre-programmed logical number of tasks in the proper order and at the proper time by a pressure in a predetermined pressure range, and each valve is designed to perform a specific task.

28. The way of punching and processing multiple intervals of one or more subterranean formations traversed drilling the well that contains the following stages:
a) deploying equipment bottom of the casing from the pipe string within the borehole, while the equipment of the bottom casing has a perforating device and the sealing mechanism;
b) the use of a perforating device for perforating at least one interval of one or more subterranean formations;
C) the installation in a certain position of the equipment the bottom of the casing inside the drill the new wells and the operation of the sealing mechanism to provide hydraulic seals below at least one of the perforated interval;
g) the discharge of the processing fluid down the annular space between the casing pipe and the drill hole and the perforation created by perforating device, without removing the perforating device from the borehole;
d) disabling the sealing mechanism;
e) repeating steps (b)-(d)at least one additional interval of one or more subterranean formations; however, at least one of the stages performed by the logical valve for remote intervention on item 27.

29. Device to perform a group of consecutive events through one or more downhole tools having logical valve for remote intervention, containing at least one family of valves consisting of two or more different valves located inside the nodes, where one node connects to another node through an insulating pressure connection with the valves of the specified at least one family of valves configured to perform a group of consecutive events through one or more downhole tools when applying through the logic valve the flow of fluid under pressure and to carry out independent execution of C is previously programmed logical number tasks in the proper order and at the proper time by a pressure in a predetermined pressure range, each valve is designed to perform a specific task.
Priority items:

23.09.2002 according to claims 1-7, 15-20, 27-29;

28.07.2003 on PP-14, 21-26.



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil industry and can be implemented at development of oil fields with hydraulic breakage of horizon. The facility for hydraulic sand blast perforation of wells consists of a case of a perforator with an axial channel and side holes wherein head pieces are rigidly fixed. At the top a double-step bushing is rigidly secured to the case; the bushing is installed in a double-step coupling. By means of the coupling the facility is attached to the flow string. A circular pressure tight cavity filled with oil is created between the steps of the bushing and coupling. A unit of centering elements is fastened to the case from beneath. The unit includes an axial channel with a saddle for a working ball and doubled vertical ribs wherein vertical slots are made. Flexible arc-shaped plates permanently contacting with a casing string of the well are installed between each pair of ribs on axes. Bushings assembled in the slots are secured on the ends of the axes; the slots are of length facilitating travel of bushings in them at a distance of flow string elongation caused by pulsation of working fluid pressure.

EFFECT: increased reliability an efficiency of facility operation.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to oil producing industry, particularly to system and method of well treatment to improve communication of reservoir with well. The system of well treatment for creating a transient mode of reservoir pressure exceeding hydrostatic pressure in well consists of a case forming a packed chamber for pulse generating, wherein pressure is less, than the pressure outside the case, and of a charge for pulse generating installed inside the packed chamber and designed for actuation of pulse penetrating through the case, but not through material outside the case.

EFFECT: creating method and system for improved communication of well with reservoirs in formation, through which well passes.

21 cl, 11 dwg

Punching perforator // 2355877

FIELD: oil and gas industry.

SUBSTANCE: invention refers to construction and repair of oil, gas and other wells and can be implemented at emergency works for circulation restoring. The punching perforator consists of a case, and of a spring loaded couple piston-plunger creating above- and under- plunger space in the case. The perforator also consists of a working piston in under-plunger space with a punching tool installed therein, of a power drive supplying working fluid, the drive is made in form of a pipe pressure tight assembled on the case; the pipe has an instrument head and a tubular electric heater installed inside the pipe, further the perforator consists of a switcher assembled between the case and the power drive hydraulically connecting above-piston space and the cavity of the power drive pipe, and of a feeding cable. The power drive is arranged inside the heat insulated case creating pressure tight cavity between them. In the upper part of the tubular electric heater designed to rotate axially there is installed a conductor contacting a clutch. The clutch is electrically connected to the feeding cable. In the lower part of the tubular electric heater there is assembled a case with a thrust land inside of which there is installed a rod with an overrun limiter; the rod is rigidly connected to the couple piston-plunger.

EFFECT: creating high efficient punching perforators automatically switched off after punching hole.

2 dwg

FIELD: mining.

SUBSTANCE: method of control over unstable state in well borehole wherein columns of firing gun are formed in accordance with required transitive unstable state in interval of perforation consists in creating required transitive unstable state in interval of well borehole perforation. There is used porous hard material produced by detonation of the column of the firing gun at direct vicinity from one section of firing gun column. Also porous hard material has originally pressurised volume to receive fluid mediums from the well borehole in result of detonation of the column of the firing gun.

EFFECT: upgraded communication of fluid medium between well and reservoirs in formations.

26 cl, 19 dwg

FIELD: transport.

SUBSTANCE: load-lifting device to support vehicle mixer (28) intended for hydraulic fracturing comprises a support frame with the lifting platform vertical carriages designed to allow the mixer to move, in fact, along the linear vertical trajectory between the lifted, transport and lowered working positions. The load-lifting device incorporates a drive system to move the mixer and platform between the working and transport positions. The said drive system is arranged to move along the support frame to minimise bending loads.

EFFECT: higher reliability.

5 cl, 14 dwg

FIELD: mechanics.

SUBSTANCE: invention relates to oil industry and can be used in oil reservoir engineering using hydraulic fracturing. Borehole hydraulic perforation device consists of tubing string (1), casing (2) of perforator with axial channel (3) furnished with lateral holes (4) housing nozzles (5). The device incorporates also two-stage sleeve (6), assembly of centering devices arranged below aforesaid nozzles (5), coupling (7) fitted on sleeve (6) with the help of bearing (8) arranged between annular stop (9) of the coupling and larger stage (10) of sleeve (6). The assembly of centering elements consists of casing (11) with seat (12) at its top to accommodate working ball (13) with four centering ribs (14). One of the said ribs has slot (15) accommodating lengthwise axle (16) supporting holders (17) of rollers (18) jointed by torsion spring (19) that ensures constant contact of roller (18) with the wall of well casing (20). The angle with apex at the point whereat roller (18) touches the wall of well casing (20) and formed by the radius of well casing (20) and the line passing through the axis of turn of holder (17) of rollers (18) is smaller than the angle of friction.

EFFECT: higher reliability and efficiency.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry, particularly to oil field equipment applied for perforating oil-well tubing in wells. The perforator for oil well tubing includes a body consisting of three parts, in upper and middle parts of which there are made cavities filled with air and a liquid filled chamber located between them wherein pistons with plungers are installed. In the lower part of the body there is a filled with liquid chamber via a channel connected with a piston-puncher perpendicular to the axis of the perforator and a friction element interacting with a valve; the friction element is secured on the interior wall of the body. Also a through vertical aperture is made in the valve from the side facing the channel; and a dog interacting with the piston-puncher and displacing the valve in horizontal plane is installed on the other side of the valve.

EFFECT: simplification of perforator design and increased efficiency of operation owing to increased punching characteristic.

4 cl, 4 dwg

FIELD: mining.

SUBSTANCE: safety device for breaking ballistic chain in perforation system. The safety device consists in essence of a body of a tubular shape with the first and second ends; the said body is designed to be assembled in any place of the perforation system. The device also contains the first and the second ballistic sections in the body and the third ballistic section able to rotate; the third section is installed in the body so as to travel between a neutral and actuating position by means of utilising pressure in a borehole. When perforation system is taken out of the borehole the safety device returns the third ballistic section in the neutral position. Additionally there is implemented a device for continuous neutralisation of the third ballistic section to prevent haphazard detonation when the system is being extracted from the borehole.

EFFECT: facilitating safety at borehole perforation.

15 cl, 6 dwg

FIELD: mining.

SUBSTANCE: method of secondary exposing for oil and gas producing formations consists in perforation of wall of flow string at level of producing formation through holes plugged with material which is subject to removal. As subject to removal material there is used a material with melting temperature below the temperature of melting of flow string material. Perforation of the wall of the flow string is performed by means of heating flow string at the level of producing formation to the temperature of the said material melting. Flow string heating is carried out with a well heater or by temperature of exposed formation.

EFFECT: upgraded efficiency of method due to reduced time for formation exposing and elimination of negative chemical effect of acid onto flow string in bottomhole zone.

2 cl

FIELD: oil and gas industry.

SUBSTANCE: invention refers to downhole analysis of underground bed. Specifically invention refers to sampling through perforations in well bore leading to the underground bed. Method and device for caving reduction in perforation formed in well bore and leading from well bore to underground bed are offered. The well bore contains the device body with the lever moving forward. The perforation contains one or more caving block units mounted by using the lever. Caving block unit is designed so that to prevent caving from base fluid to the body through perforation.

EFFECT: reduced contamination of base fluid.

31 cl, 20 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention refers to well equipment and can be implemented at production of fluid or at pumping working agent. The unified well chamber consists of a case in form of cylinder or oval pipe, of lower and upper tips with pipe thread, of an internal mandrel installed in the upper tip and made with a screwed surface for rotation of a cable tool - a projecting deflector. The hollow pocket is made with at least one additional support boring of a bigger diametre located between the lower boring of a smaller diametre of the hollow pocket and a support face of boring of a bigger diametre, also the diametre of the support boring is bigger, than the external diametre of the elastic element of the removable device or instrument; in addition, at installation of a long removable device or instrument into the hollow pocket the elastic element of the device or the instrument is fixed in the lower support face or lower boring of a bigger diametre, while at installation of relatively short removable device or instrument into the hollow pocket the elastic element is fixed higher in the additional support boring of a bigger diametre.

EFFECT: unification of well chamber design facilitating installation of long, as well as short removable devices or instruments into the same hollow pocket of chamber.

6 cl, 6 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to down hole tools, particularly to shape of pass through openings made in their cases for down hole valves or pass through flow regulators, specifically for valves or tools like sliding coupling applied in pressure wells. The essence of the invention is as follows: according to one of the versions the case of the down hole tool has a body of the case wherein a pass with a lenghthwise axis is made. There is at least one opening with upper and lower ends relative to the borehole of the well made in the body of the case and designed to let fluid with solid particles under pressure out of it. Also the opening, meant to minimise erosion effect onto a casing column of the well, and the pass itself have flat or inclined flat, or inclined flat and curvilinear surfaces forming an extension in the direction from the upper end of the opening to its lower end.

EFFECT: increased reliability of installation operation due to reduced erosion wear of outlet opening of this installation.

26 cl, 7 dwg

FIELD: mining.

SUBSTANCE: present invention pertains to drilling techniques and can be used in drilling oil and gas wells using downhole drilling motors. The device has a hallow case with side openings, a bushing fitted inside the case, with a seat, radial overflow valves, a centre channel, facing a slide valve, spring loaded against the stop, fitted with provision for axial displacement and with a cowling, packing rings for covering the centre channel and a nut, limiting movement of the slide valve, and a bushing. The device has an upper adapter and a rubber seal, on whose outer surface there is a groove in which a baffle plate is fit. At one end of the seal, there is conical ring-shaped ledge, which, together with the baffle plate, is pressed to the slide valve and the hollow housing by an adjustment ring and a bearing disc, with the help of the threaded joint of the upper adapter with the hollow case. The other end of the seal freely lies inside the bushing with an annular gap in the zone of radial overflow channels and the seat of the bushing. The slide valve is fitted inside the bushing, in the bottom part, which is lower than the step made on its outer surface. There are overflow channels coming out to the annular gap, formed by the bushing, fitted on the outer step of the bush sleeve, and the bottom part of the bush sleeve.

EFFECT: reduced hydraulic resistance to the flow of drilling fluid, elimination of intense abrasion and fast wearing of components, increased air-tightness of the valve device, provision for long storage periods in working condition and increased reliability, durability and cost effectiveness of the device.

4 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: facility contains case with holes made opposite to each of producing formations pressure tight separated from each other with packers. Adjustable valves are secured outside to a sleeve opposite to each of its holes; the said valves are designed to operate the corresponding producing formations at specified values of pressure in them. Each adjustable valve consists of a hollow cartridge wherein a bushing with a saddle is placed and a ball spring loaded from top to bottom; the said ball is placed on the bushing saddle, while the bushing is designed to adjust contacting force of a ball spring. Inside the sleeve there is a nipple plugged from beneath; this nipple is equipped with side holes and gates. At that, side holes of the nipple are arranged opposite sleeve holes; the latter must be set in the "open" position. The gates are pressure tight installed opposite to holes of the sleeve and they must be set in the "closed" position.

EFFECT: facilitating selective movement of valve bushings at one lowering of control mechanism into well, excluding of back flow of well liquid into formation at moment of well shutdown; regulated withdrawal of well liquid form producing formations depending on pressure therein.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: facility contains a case with holes made opposite to each of producing formation; valve bushings installed in the case opposite to each of its holes and designed to axially travel; the said bushings are equipped with spring circular fixing devices and clamped components; the facility also contains a control mechanism which is lowered into a well from a day surface and actuates the valve bushings to open or close the case holes, and packers. According to the invention outside the case opposite to each of its holes adjustable valves are installed. Each adjustable valve consists of a hollow cartridge wherein a bushing with a saddle is placed with a ball spring loaded from top to bottom; the said ball is placed on the bushing saddle. At that, adjustable valves are designed to run corresponding producing formations at exceeding of the set values of pressure by means of control of ball spring contraction force for each adjustable valve individually; and the clamped components of the valve bushings are made as their lower ends; while inside diameter of each of valve bushings decreases from top to bottom.

EFFECT: facilitating selective movement of valve bushings at one lowering of control mechanism into well, excluding of back flow of well liquid into formation at moment of well shutdown, regulated withdrawal of well liquid form producing formations depending on pressure therein.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry and can be used at operation of multibed wells both for separate and simultaneous development. Method includes selected development of producing beds by means of installation of receiving valves in the structure of a sleeve; the valves are installed in operating columns against each of producing bed; each valve has two steady positions: "closed" and "opened". According to the invention the receiving valves are installed on a case, located in operational column, and they bypass well liquid only in the bottom-up direction. At that, transition of receiving valves into one of the steady positions "opened" or "closed" is achieved by means of a nipple, installed inside the case and plugged from the bottom; the said nipple also has side apertures and gates. The side apertures of the nipple are arranged against the receiving valves, which ought to be set into "opened" position, while the gates are pressure tight installed against the receiving valves, which ought to be set into "closed" position.

EFFECT: reduction of well operation costs.

3 dwg

FIELD: mining.

SUBSTANCE: back valve contains sealing, rod with closed head designed to be pressed tightly to sealing, one or more grooves on rod, and pressure force creating spring for setting off rod into tightened position. The safety valve contains a plunger in a case which operates under pressure of a working fluid, a flow pipe, functionally connected with the plunger, and a system of chemical reagent supply arranged inside the case and containing at least one back valve. The device of pressure tightness control of fluid medium pipeline contains a case with at least one pass for fluid medium flow, and cartridge installed in the case and equipped with at least one pass for fluid medium flow. The latter can be positioned against at least one pass in the case so as to allow or close communication between the said passes for fluid medium in the case and the cartridge.

EFFECT: upgrades effectiveness and efficiency and reduces costs.

21 cl, 7 dwg

Casing pipe valve // 2335619

FIELD: mining.

SUBSTANCE: valve includes stopper with saddle and side channels, and bushing designed to close pressure tight side channels of stopper. The stopper is blinded at the bottom and is connected with the casing pipe. From below the casing pipe is equipped with a lower sleeve in its turn equipped below and inside with a cylinder recess where a hollow tail designed to perform upper axial movement is inserted and fixed in its lower position with shear pins. The sleeve is rigidly installed in the upper end of the hollow tail and is designed to interact in its upper position with the upper surface of the stopper saddle and to close pressure tight the side channels of the stopper from outside. A squeezing plug with a pressure tight head below and a ring recess made on the inside surface at the upper part of the stopper is used for pressure tight closing from the inside the side channels of the stopper. The ring recess of the stopper fixes pressure tight closing head of the squeezing plug in the stopper after interacting between the lower end of the tight pressing head of the squeezing plug and a stopper blind.

EFFECT: upgraded reliability of device operation and reduction of well construction period.

1 dwg

FIELD: oil and gas mining.

SUBSTANCE: flying valve for free piping contains tubular frame with separated element in form of rotation body and separated element block stop. Block stop is ring-shaped with diameter less than inner diameter of tubular frame. Ring block stop wall thickness is increased in direction of separated element, upper and lower edges of ring block stop are rounded. Block stop can be made as sole part with tubular frame and connected with two and more locks. Block stop can present the separate part with no less than two ledge-plungers pins. At that time tubular frame is made of flexible elastic material and in its wall holes are made, with similar form as block stop ledge-plunging pins. Besides, ledge-plunger pins come into holes of tubular frame.

EFFECT: lifting of liquid from hole in broad range of effective pressure and operating expenses of gas and liquid.

6 cl, 10 dwg

FIELD: boring.

SUBSTANCE: invention is referred to boring field. The flap contains a thrust ring with axled openings. Under a valve seat the plate with a working surface is placed. At the top with a thrust ring, and in bottom with a plate the spring-biased double-end bolt is connected with a through hole. In a spring-biased double-end bolt through hole a shear lock is placed. The flap is furnished by the cylindrical body. In the top of shank bore of the body the conical bore with formation of an annular platform for interplay with a thrust ring is executed. In bottom of shank bore of the body the cylindrical bore, furnished with a thread is executed. The valve seat is executed in the form of the hollow step sleeve. On an outboard surface of a saddle the thread is placed. In the top the saddle is furnished with internal bore. In the bottom of an outboard surface of a saddle the gouge for the screen is executed, connected with shank bore of the flap by means of some through holes. In the body the baffle plate is placed. The baffle plate is furnished by axled smooth-bore openings, and on the centre - by a threaded opening. In a threaded opening the hollow stopper is installed, on side surfaces of which two oval openings for movement possibility of a shear lock are executed. At the upper end of a hollow stopper the recess with a conical surface for the seal installation which have been drawn in by a spring through a washer, is executed. Between the bottom end of a hollow stopper and a baffle plate an o-ring is installed. The plate is executed with a bilateral wedge-shaped track in which the seal is placed.

EFFECT: increase of reliability of device operation.

1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: valve has body of steel, throttling assembly, locking assembly with ball and saddle for it. Between locking and throttling assemblies resilient impenetrable wall separating these is mounted fixedly with possible interconnection via U-shaped, turned by its knee upwards, tubular channel, with inner diameter greater than ball diameter, having two branches directed downwards and having various lengths. Elongated pipe branch is connected through open end fixedly placed on wall to hollow of body throttling assembly. Short branch end is placed above wall and is within hollow of locking assembly. Short branch pipe is extended above the knee for distance greater than ball diameter. It is made in form of branch pipe with closed upper end, forming a hollow - tank with stopping device for placement and holding of ball therein in starting position. Ball can possibly fall freely under its own wait in downward direction onto saddle if released by stop as a result of effect from outside force from cementing plug at the end of cementation.

EFFECT: higher reliability, better quality.

7 cl, 8 dwg

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