Downhole system with string having electric pump and inductive coupler

FIELD: oil and gas production.

SUBSTANCE: system for use in the hole includes the string designed for location in the hole that consists of submersible electric pump, the first part of inductive coupler and completion section. Note that completion section is located in the well zone under development and includes the second part of inductive coupler, isolating packer, detection cable and electric device electrically connected to the second part of inductive coupler. Note that detection cable goes through the packer for provision of sensors to some well zones.

EFFECT: increase of system operation efficiency and collection of measurement data referred to the well characteristics.

28 cl, 7 dwg

 

The technical field to which the invention relates

In General the present invention relates to a system intended for use in a borehole that includes a column with the pump and the first part of the inductive coupling element, the section completion, with the second part of the inductive coupling element, inductively related to the first part of the inductive coupling element, and the electrical device is electrically connected with the second part of the inductive coupling element.

Prior art

System completion is installed in the well for production of hydrocarbons (or fluid other species) from reservoir (reservoir) near wells or to pump fluid in the reservoir (reservoir) through the hole. In some systems completions include pumps such as submersible pumps). Submersible pumps are usually used for mechanical lifting fluid from a well or reservoir.

To perform the technical activities related to the submersible pump, for example for repair of submersible pump, the upper section completion must be removed from the system completion. To prevent leakage fluid in the case, when the upper section of the UN-removed, the well is usually choke the cord is Loy fluid medium or tampons, to control the well, when the upper section completion is lifted from the well. Alternatively, there may be a valve isolation layer for isolating the collector at the time when the upper section completion is lifted from the well.

In the presence of a submersible pump system completion there are various limitations due to the lack of access through the hole for the implementation of technical measures below the submersible pump. The first limitation relates to the possibility of safe and effective to actuate a valve or other control devices. When a submersible pump is available, another limitation refers to the ability to effectively collect sensor measurement data relating to downhole characteristics (such as pressure and/or temperature). Known methods of obtaining measurement data relating to downhole characteristics usually include a descent into the well intervention device. The descent of the interventional instrument can be costly, especially in relation to underwater wells.

The invention

In General, under option exercise system intended for use in a borehole and including a column for placement in the borehole with electric pump is the first part of the inductive coupling element. The system also includes a section for completion of the placement developed in the well area, which includes the second part of the inductive coupling element for inductive coupling with the first part of the inductive coupling element. Section completion also includes an electrical device electrically connected with the second part of the inductive coupling element.

Other or alternative features will become apparent from the following description, from the drawings and from the claims.

Brief description of drawings

Figures 1, 2 and 4 represent the views of the lower sections of completion according to the options for implementation, which include the sensor node.

Figure 3 depicts the type of system completion with the production casing attached to the lower section of the completion of figure 1 and includes a submersible pump;

5 is a view of another system completion with the production casing attached to the lower section of the completion of figure 4 and includes a submersible pump;

6 is a view of another system completion with the production casing attached to the lower section completion, with a different layout, and includes a submersible pump;

Fig.7 is a view of another system completion with the production casing, p is soedineniya to lower sections of completion, with the arrangement of another type, and includes a submersible electric pump.

Detailed description

To facilitate understanding of the present invention in the following description, numerous details set forth. However, specialists in the art should be understood that the present invention can be used in practice without these details and that numerous possible changes and modifications of the described embodiments.

Used in this application, the terms "above" and "below", "upward" and "downward", "upper" and "lower", "upward" and "downward"and other similar terms indicating relative positions above or below a given point or element are used in this description to more clearly show certain embodiments of the invention. However, when applied to equipment and methods, intended for use in wells that are deviated or horizontal, such terms as appropriate, may designate the "left to right", "right to left" or diagonal dependency.

According to some variants of implementation in the well place the column (for example, the production casing or column for injection), which includes a pump, such as a submersible pump. The pump performance is made by a pump, designed to move fluid into the well when the pump is put in action by using the signal, which may be an electrical signal, optical signal, or a signal of another type. The electric pump is supplied with energy from a power source located on the earth's surface (which goes well), or from local downhole power source. In relation to the production of a submersible pump is used for the implementation of mechanized lifting fluid to the surface through the borehole to facilitate the extraction fluid (e.g., hydrocarbons) from the collector (or collectors).

Production column or column to pump includes a pump, and the first part of the inductive coupling element, which is electrically connected with an electric cable passing to another location in the well or to the place on the earth's surface. Electric cable, which is electrically connected to the first part of the inductive coupling element may be an electric cable to the pump (the "pump cable"), or alternatively, the electrical cable may be separate from the pump cable.

The first part of the inductive coupling element provides the ability to transmit power and data to one or more electrical devices that I have are part of the lower section completion, with which is connected the operating column or column to pump. Production column or column to pump effectively form a two-stage system completion. The lower section completion also includes the second part of the inductive coupling element, which is located near the first part of the inductive coupling element, when operating the column or column to pump connected with the lower section of the completion. The first and second part of the inductive coupling element, which form an inductive coupling element, enable inductive coupling power and data between the production column or column to pump and the lower section of the completion.

Parts of the inductive coupling element is transferred by using induction. Induction is used to denote the transmission time-varying electromagnetic signal or power that is not based on the presence of a closed electrical circuit, and is due to the wireless component. For example, if through the coil is omitted time-varying current, a consequence of the passage of time is that in the medium surrounding the coil, it will form an electromagnetic field. If a second coil is placed in this magnetic field, this second coil Boo is no generated voltage, which is called the induced voltage. The effectiveness of this inductive coupling increases as the coil closer, but this is not a necessary condition. For example, when time varying current is passed through the coil wound around the metal core, it will be the induction voltage in the coil wound around the same core, some distance from the first coil. In this way one transmitter can be used to power and communicate with multiple sensors along a well bore. With sufficient power, the transmission distance can be very large. For example, the solenoids on the ground surface can be used for inductive coupling with the underground coils in the depth of the wellbore. In addition, it should be noted that the coil does not need to be wound as a solenoid. Another example is the implementation of inductive coupling in the case where the coil is wound as a toroid around the metal core, and the voltage induced on the second toroid, a remote at a distance from the first.

Examples of electronic devices that can be part of the lower section completion, include sensors, valves for regulating the movement of fluid and/or the others who Elektricheskie device. Using inductive coupling element measurement data from the sensors in the lower section of the completion can be transferred to the electric cable of the production string. Electric cable production string data can be sent to the ground controller, located at the earth surface or downhole controller, located in the well. In addition, an electrical cable casing can be received command to exercise control of an electric device such as a valve in the lower section of the completion. An example of such a valve is a valve insulation layer, which in the closed position is used for isolation zone or collector wells, so that the upper part of the system completion, such as operating a column or column for injection may be removed from the well.

Electric cable production string energy can also be served on the electrical device (s) in the lower section of completions through inductive coupling element. Energy may be supplied from an energy source on the earth's surface or from the energy source, which is part of the production string. Examples of power sources include batteries, power supplies, etc.

According to another variant implementation of the well is hydrated generator can be used to provide power to the sensors and electrical devices, and wireless telemetry (e.g., acoustic telemetry) between the lower and upper completion equipment can be used instead of the inductive coupling element.

According to other variants of the implementation of the inductive elements of communication can be omitted, so that the communication with the downhole electrical devices and managed using a different principle.

According to some variants of the invention, the data transmission and/or power to the electric devices can be carried out without intervention, despite the fact that operating a column or column to pump includes a pump. Transfer without intervention means the transmission, for which you do not want to descend into the well a separate device (called interventional device). The possibility of without the intervention of communication with the electrical devices in the system completion, which also includes the pump, provides a more efficient operation of wells (underground wells or underwater wells).

In the following review is an appeal to the systems completions, designed for the extraction of fluid from wells. It should be noted that the methods discussed below can also be applied to systems for zakachivanie is, through which fluids (liquids or gases) can be pumped into the borehole and the surrounding manifold (headers).

Figure 1 shows the lower completion section 100 according to one variant of implementation, which is placed in the borehole 102, having a plot, lined casing 104. The lower completion section 100 is located near the manifold 106, from which is extracted fluids, such as hydrocarbons. In this case, the collector 106 forms a part of the developing zone of the well. In relation to heighten development area referred to as the injection of fluid into the reservoir.

The area of the borehole 102, which passes through the manifold 106, not lined (in other words, the lower completion section 100 is at least partially placed on the open interval of the wellbore 102). According to the alternative implementation of the lower completion section 100 may be located in the interval, which is lined with casing 104 (or shank of another type), while the perforations formed in the casing string or other shaft to allow movement of fluid between the surrounding reservoir and wellbore 102.

As shown in figure 1, the lower completion section 100 includes a packer 108. Below the packer 108 is body section 110. Part 112 inductive element of the ligature (for example, covering part of the inductive coupling element is a part of the Cabinet section 110.

The valve 116 insulation layer is attached to the housing 110. The actuator 114 of the valve attached to the valve 116 insulation layer and is designed to control (opening or closing) the valve 116 insulation layer. According to figure 1, the valve 116 insulation layer is made as a ball valve. In accordance with other embodiments of the valve 116 insulation layer may be in the form of valves of other types, such as valves, tubular bolt, disc valves, one-way sealing articulated valves, two-way sealing articulated valves, etc. As shown in figure 1, when the valve 116 is closed, the manifold 106 is isolated from the well 102 above the lower completion section 100, so that the fluid medium from the reservoir 106 may not flow into the borehole 102 above the lower completion section 100 or fluid from the annular space 101 of casing is not able to flow in the collector layer 106. However, when the valve 116 insulation layer is open, the collector fluid medium can pass from the annular space 101 through the node 118 to control the sand flow into the perforated tube or pipe with a slit-like openings, which is part of the lower completion section 100, the inner bore 120 of the bottom is a section 100 of the completion. The annular space 101 is limited by the node 118 to control the intake of sand and sandy surface 103 of the well. Fluids flow up through the open valve 116 insulation layer in the production casing (shown in figure 3), which is located above the lower completion section 100. Examples of node 118 to control the sand flow include a sand filter, a shank with a slit-like holes, or perforated liner, or a pipe with a slit-like holes, or perforated pipe. Around the node 118 to control the sand flow is chock-full of gravel, so that the node 118 and gravel packing in combination can filter particles, such as sand, from the produced fluid.

According to a variant implementation of figure 1 to control the valve 116, the actuator valve 114 is mechanically connected to the valve 116 (which is a mechanical valve isolation layer). The actuator valve 114 may include, for example, moving core, which moves to the first position for opening the valve 116 and the second position to close the valve 116. As considered further below in conjunction with figure 3, the actuator valve 114 is actuated electronic or propulsion module, which is part of the production string.

The lower the completion section 100 also includes a node 124 of the sensors, through the module controller 126 is electrically connected to part of 112 inductive coupling element. The module controller 126 may receive commands from another place (for example, from the surface or from another location in the well). These commands can instruct the module controller 126 to activate the sensors 128 node 124 sensors to the implementation of the measurements. Examples of parameters that may be measured include temperature, pressure, flow rate, density of the fluid, the resistivity of the collector, the relationship between oil, gas and water, the viscosity, the ratio of carbon and oxygen, acoustic parameters, characteristics to be detected by chemical means (for example, detection of paraffin, wax, asphaltenes, sediment, pH, a measure of salinity), etc. in Addition, the module controller 126 can save and transfer the measurement data coming from sensors 128. Therefore, at periodic intervals or in response to commands from the module controller 126 may transmit the measurement data to another component. Typically, the module controller 126 includes a processor and a storage device.

Node 124 sensors can be made in the form of sensor cable (also known as touch suspension). Sensor cable at its core is a continuous transmission line signals having sites, are provided by the sensors. The sensor cable is continuous in the sense that the length of sensor cable provides a continuous seal against fluid environments, such as downhole fluids. It should be noted that according to some variants of the continuous sensor cable actually can have a separate housing sections, with the seal attached to each other (e.g., by welding). According to other variants of implementation of the sensor cable can be made as part of the whole continuous membrane without tearing. Additional details relative to the sensor described in the application, the registration number 11/688089, U.S. patent entitled “Completion system having a sand control assembly, an inductive coupler, and a sensor proximate the sand control assembly (register No. 68.0645 (SHL.0345US) patent attorney), filed on March 19, 2007, which is incorporated into the present application by reference.

Figure 2 shows an embodiment of the lower section 100A of the completion. The difference between the lower section 100A completion, shown in figure 2, and the lower completion section 100 shown in figure 1, is that according to a variant implementation of figure 2, the valve 200 insulation layer is made in the form of a valve with a sliding tubular bolt, and not in the form of a ball valve 116, which is depicted in figure 1. RMSE is esashi tubular shutter 200 is made sliding in the longitudinal direction of the borehole 102. Sliding tubular shutter 200 can slide between an open position and a closed position relative to the one or more holes 202, which are made in Cabinet sections 110A, passing down from the packer 108. The shutter 200 is operable connected to the actuator 204 of the valve, which can also be powered electronic or motor module (considered further below). The actuator 204 of the valve are moving to move the valve 200 with a sliding tubular shutter between an open position and a closed position.

Similarly to variant implementation of figure 1 the lower section 100A completion also includes the node 124 sensors, the module controller 126 and the portion 112 of the inductive coupling element.

On the lower end of the Cabinet section 202 also made the hole 206. Figure 2 hole 206 clogged tube 208. In case the tube 208 to place any flow between the annular region 101 (which is limited between node 118 to control the intake of sand and sandy surface 103 wells 102) flows through the valve 200 with a sliding tubular shutter. Tube 208 is extracted stopper that can be removed to allow movement of the downhole fluid through the bottom hole 206 Cabinet section 110A. The hole 206 in ravnina in the longitudinal direction relative to the inner bore 120, so that the downhole tool may pass through the opening 206 in the interval of the well bore below the valve 200 insulation layer. According to alternative implementation tube 206 can be replaced with a mechanical valve insulation layer, having in its composition a ball valve or a disk valve, or a hinged valve, to gain access to the lower region 120 of completion without having to perform ascent and descent for the extraction tube.

Figure 3 shows the placement of the production casing 300, which includes a pump and tubing 302 and submersible pump 304, in the borehole 102. Production column 300 is connected with the lower completion section 100 of figure 1. Production column 300 and the lower completion section 100 together form a two-stage system completion. As shown in figure 3, the operational column 300 also includes a sleeve packer 306, which acts as a barrier for rock fragments, designed to prevent the passage of rock fragments from the bottom of the hole 102 in the annular region 308, which is located above the sleeve of the packer 306 and which is limited by the outer surface of the tubing 302 and the inner surface of the casing 104. According to some variants of the implementation of the sleeve packer not despise. According to the about another variant implementation of the packer completions down so, so he was above the submersible pump.

Production column 300 also has a subsurface safety valve 310 (which is not mandatory), which close in the event of an accident to stop the borehole 102. Production column 300 also includes a sliding joint 312 (which is not mandatory), which is provided for regulating the longitudinal length of the production casing installed in the packer 108. It should be noted that the operational column 300 is placed between the retainer 108 and tube suspension (not shown)located on the earth's surface. Production casing 300 is connected with the lower section completion, using the mechanism 317 spring latches (or the connecting mechanism of some other type).

Production column 300 also includes a module of the actuator, for example electronic and motor module 314 and 316 control. The module of the actuator can be an electric, electro-hydraulic, hydraulic, or any other mechanism designed to control the valve isolation layer. Item 316 includes a processor, storage device, and optionally, the sensors (e.g. temperature sensors and/or pressure). Item 316 management also includes telemetric the RCM module for communication with the ground controller, located on the earth's surface, or other downhole controller.

Electronic and motor module 314 includes components for actuation of the actuator valve 114. Electronic and motor module 314 mechanically connected to the actuator valve 114 to move the actuator valve 114 between the different provisions with the purpose of actuating the valve 116 insulation layer. According to some variants of electronic and motor module 314 includes an engine control actuator valve 114. Electronic and motor module 314 is electrically connected with the electrical cable 320, which goes up from the electronic and motor module 314 to the moving joint 312. On the sliding interface 312 electrical cable 320 may be wound along a helical line before the formation of the electrical cable 320 spiral winding. From the upper end of the moving interface 312 electrical cable 320 is pulled further upward through the sleeve packer 306 in the annular region 308 over lip liner 306. Electrical cable 320 may be stretched to the earth's surface or to another location in the wellbore. Figure 3 also shows the second electrical cable 322, which is connected to a submersible electric pump 304 of the Second electrical cable 322 is called the pump cable. Cable 322 pump serves energy and commands for submersible pump 304 with an electric drive.

Item 316 control electrically connected with a part 318 inductive coupling element (which is attached to the lower part of the casing 300). Part 318 inductive coupling element may be covered in part inductive coupling element, which can be located inside the covering portion 112 inductive element connection lower completion section 100. When placed near each other part 112, 318 inductive element connection can transmit data and energy by inductive coupling. Measurement data collected by the node 124 sensors, are transmitted through the inductive coupling element formed by the parts 112 and 318 inductive coupling element, in paragraph 316 of the control.

In addition, paragraph 316 control electrically connected with the electrical cable 320 to allow connection of an electrical cable 320 with another component (for example, with the ground controller or the downhole controller).

According to alternative implementation, instead of using two separate electrical cables 320, 322 for separate connection to the submersible pump 304, and electronic and motor module 314, and to step 316 control the same electrical cable m which can be stretched as a submersible pump module 304 and 314, and to paragraph 316 of the control.

In the process, into the borehole 102 first descend to the lower completion section 100 to a depth adjacent to the manifold 106 from which mining operations will be conducted. Then, to fix the position of the lower completion section 100 and sealing in a fluid environment, set the packer 108 of the lower completion section 100. Next, if you want to control the flow of sand, make the gravel packing to lay gravel annular region 101 between node 118 to combat the flow of sand and sandy surface 103.

After the implementation of gravel packing a borehole 102 down the production casing 300, using the mechanism 317 with spring latches. After operating the column 300 and the lower completion section 100 is connected, you can start the extraction fluid.

When performing operations described above, the valve 116 insulation layer may be actuated between open and closed positions by the use of electric commands transmitted via an electrical cable 320 in the electronic and motor module 314. In paragraph 316 of control can be introduced how to collect measurement data from block 124 sensors and transfer the measurement data to a ground controller or other downhole controller. Immersion is electronicos 304 may be enabled for operation started pumping the fluid to lift the produced fluid in tubing string 302.

Figure 4 shows the lower section 100B of completion, including electric valve 400 isolation layer (not mechanical valves 116 and 200 insulation layer from figures 1 and 2). The control of the electric valve 400 insulation layer is performed by using electric power supplied by an electrical cable. Electric valve 400 isolation layer may include the source 402 of energy. The source 402 of energy is connected by electrical wire 404 to part 112 inductive coupling element, which is part of the lower section 100B of the completion.

According to one variant of implementation of the energy source 402 electric valve 400 isolation layer may be implemented as a capacitor. The capacitor can be continuously recharged by energy transmitted through a portion of the inductive element 112, so that there was an electrical charge sufficient to actuate the valve isolation layer. According to an alternative embodiment, the energy source may be in the form of battery instead of using a capacitor as the source 402 of energy. According to another variant implementation of energy to the valve 400 isolation layer can be obtained from the energy source, which is part of the production string (not shown in figure 4) or from the power source N. the earth's surface. This electrical energy is transmitted through an electrical cable to a mating part of the inductive coupling element, which is located near the part 112 inductive coupling element of figure 4.

The source 402 energy is used to actuate components electrical valve 400 insulation layer to open or close the valve. The management of such actuation is accomplished through the use of commands that are transmitted over an electrical cable 320 (figure 5).

In addition, the lower section 100B completion differs from the lower completion section 100 so that the isolation packer 406 is located in the annular region 101 on the outside of the node 118 to control the sand flow. Packer 406 annular space 101 can be divided into two zones (one zone above the packer 406, and the other zone below the packer 406).

The lower section 100B completion also includes a sensor cable 124A beaches, which goes through the straddle packer 406, so that the sensors 128 are located in each of the zones. Sensor cable 124A beaches through the module controller 126 is electrically connected to part 112 inductive coupling element.

Figure 5 shows the production column 300A connected with the lower section 100B completion of figure 4. Production column 300A is different from the production casing 300 (Fig 3) what operating Colo is on 300A does not contain e and motor module 314, which is part of the production casing 300 of figure 3.

As shown in figure 5, item A control (which is part of the production casing 300A) is electrically connected via electrical wires (wires) 500 laid (laid) inside Cabinet section 502 of the production casing 300A. Electric wire (wire) 500 electrically connected (connected) to the covered part 504 inductive coupling element, which is part of the Cabinet section 502 of the production casing 300A. Covered by section 504 of the inductive coupling element is located near covering portion 112 inductive coupling element to allow the transmission of energy and data relating to the touch cable 124A beaches and an electric valve 400 insulation layer.

In the process of working on the item A control can be given instructions (for example, with the ground controller) on an electrical cable 320 for transmitting commands to the electric valve 400 insulation layer for actuation of the valve 400 isolation layer between an open position and a closed position. In addition, in paragraph A management can collect measurement data from the sensor cable 124A beaches and transmission of such data dimensions electrical cable 320.

According to a variant embodiment, shown in figures 4 and 5, instead of the parts 112 and 504 ind the active element can be used wireless telemetry (e.g., acoustic telemetry). In the case of this embodiment telemetry element 112 may provide wireless communication (for example, using acoustic signals) with the corresponding telemetry element 504 or telemetry element on the earth's surface. According to this embodiment, the source 402 energy is a downhole generator, which can provide energy for the control valve 400 in response to commands transmitted wirelessly (e.g., using acoustic signals).

Figure 6 shows a variant embodiment represented in figure 3. In this embodiment, the lower section 100C completion does not contain touch cable module 124 and 126 of the controller of figure 1. In addition, part of the inductive coupling element is not included in the bottom section 100C completions and production casing 300V, which is connected with the lower section 100C completion. Mechanical valve 116 insulation layer is controlled by the electronic and motor module 314 (in the same way as in the embodiment of figure 3).

Figure 7 presents another variant of implementation of the two-stage system completion, which includes the production casing 300C and the bottom section 100D of the completion. The lower section 100D completion packer has 700 and Cabinet section 702 below the packer 700. Cabinet section 702 has the ve covering part 704, 706 inductive coupling element, with the first covering portion 704 inductive coupling element electrically connected to an electric cable 708, passing up of valves 710, 712 flow control placed in areas 714, 716, respectively. Zone 714 and 716 isolated straddle packer 718. Valves 710, 712 flow control regulates radial flow fluid from the surrounding reservoir into the inner hole 720 node 118 to control the sand flow.

The second covering portion 706 inductive coupling element electrically connected to an electric valve 724 insulation layer, which is analogous to the electric valve 400 insulation layer of figure 4. Electric valve 724 insulation layer includes a source of 723 energy and electric wire 725 connecting the source 723 energy covering part 706 inductive coupling element. In addition, the covering portion 706 inductive coupling element electrically connected with the touch cable 726, which goes through the straddle packer 718. Sensor cable 726 electrically connected to the covering part 706 inductive coupling element through the module 728 controller.

Production column 300C includes two covered parts 730, 734 inductive coupling element, which are located near the respective cover portions 704, 706 is inductive element of communication. Both covered parts 730, 734 inductive coupling element electrically connected via electrical wires (wires) 736 paragraph 738 management, which is also part of the production string 300V. Other components of the production string 300C similar components of the production casing 300 or 300A of figure 3 or figure 5.

According to another variant embodiment, shown in Fig.7, there is only one inductive coupling element. Sensor, valve flow control valve isolation layer and other devices with electric drive, all connected to the same cable. In addition, instead of the electric valve isolation layer can be used a mechanical valve isolation layer.

Although the invention has been disclosed with reference to a limited number of embodiments, for specialists in the art having the benefit of this disclosure, should be obvious to numerous modifications and variants of it. It is assumed that the appended claims cover such modifications and variations as fall within the scope of the true nature and scope of the invention.

1. System for use in a borehole containing a column designed for placement in the borehole and containing a submersible pump and the first part of the inductive element SW is zi, and section completion, intended for placement in a producing zone of the well and containing the second part of the inductive coupling element designed for inductive coupling with the first part of the inductive coupling element, and an insulating packer to isolate multiple zones in a well, while the first and second part of the inductive element is placed below the insulating packer, and an electric device electrically connected with the second part of the inductive coupling element.

2. The system according to claim 1, in which the electric device is a sensor.

3. The system according to claim 2, in which the section completion further comprises a valve, and the pillar further comprises a module for actuating the valve.

4. The system according to claim 3, in which the valve is an isolation valve of the reservoir.

5. The system according to claim 3, in which the valve is a mechanical valve and section completion further comprises actuator valve moving between positions for opening and closing the valve, and the specified module is made to ensure the movement of the actuator valve.

6. The system according to claim 5, in which module contains the motor to move the actuator valve.

7. The system according to claim 6, in which the column further comprises a first electrical cable is specified module is electrically activated by means of an electrical cable.

8. The system according to claim 7, in which the column further comprises a second electrical cable electrically connected to the submersible pump.

9. The system according to claim 7, in which the first electrical cable is additionally electrically connected to a submersible electric pump.

10. The system according to claim 1, in which column represents the production casing or column for injection.

11. The system according to claim 1, in which the electrical device comprises a sensor cable having multiple sensors.

12. The system according to claim 11, in which the column further comprises a control point to communicate with the sensors through the first and second part of the inductive coupling element.

13. The system according to claim 11, in which the sensor cable passes through the packer to equip sensors in several areas.

14. The system according to claim 1, in which the section completion further comprises an electric valve having an energy source, electrically connected with the second part of the inductive coupling element.

15. The system according to claim 1, in which the electric device is a first electrical device, the column further comprises a third part of the inductive coupling element and section completion further comprises a fourth part of the inductive coupling element and the second electrical device, while the fourth part inductively what about the coupling element electrically connected with the second electrical device, and the third part of the inductive coupling element inductively associated with the fourth part of the inductive coupling element.

16. The system of clause 15, in which the first electrical device comprises a sensor cable having multiple sensors, and the second electrical device comprises a valve flow control.

17. The system according to claim 1, in which the section completion contains several electrical devices connected with the second inductive element connection.

18. System 17, in which electrical devices contain a sensor cable having multiple sensors, and valve flow control.

19. Method for use in a borehole containing the following steps: installing in the well of the first section completion with an electrical device to perform actions relative to the developing zone and the second part of the inductive element connection; installation in the borehole column containing the first electrical cable and the first part of the inductive coupling element designed for inductive coupling with the second part of the inductive coupling element, and a submersible electric pump, and the connection of the column with the first section completion; transferring at least a power or data between the first electrical cable and the electrical device via the inductive coupling element and the actuation preparing the aqueous pump to move the fluid in the well.

20. The method according to claim 19, in which the actuation of a submersible pump is performed with the use of the first electric cable.

21. The method according to claim 19, in which the actuation of a submersible pump is performed with the use of the second electric cable, separate from the first electrical cable.

22. The method according to claim 19, which further comprises actuation using the first electric cable valve isolation layer, which is part of the first section completion and is closed to isolate zones in the well.

23. The method according to item 22, in which the isolation valve of the reservoir is a mechanical valve isolation layer and the first section completion further comprises moving the actuator valve to control mechanical valve isolation layer and which further comprises activating the electronic and motor module, which is part of the column, for actuation of the actuator valve.

24. The method according to item 22, in which the valve isolation layer is an electrical isolation valve of the reservoir, which includes the module of the electric actuator.

25. The method according to item 22, in which the valve isolation layer is an electric valve isolationplaster, includes an energy source, and which further comprises charging the energy source using inductive coupling element.

26. The method according A.25, in which the energy source includes a capacitor and charging the energy source is a continuous charging of the capacitor.

27. System for use in a borehole containing a column designed for placement in the borehole and containing a submersible pump, and section completion connected with the column, designed for placement in a producing zone of the well and containing the first element of a wireless telemetry, representing an element of acoustic telemetry and intended for the wireless connection with the second element of the wireless telemetry, and the electrical device is electrically connected with the first element of a wireless telemetry.

28. The system according to item 27, in which the section completion further comprises a downhole power generator for supplying power to the electric device.



 

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EFFECT: invention simplifies mineral deposit production control process, as well as allows reducing the area occupied with process equipment.

21 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: single wells or wells forming clusters are drilled; production wells are equipped with wellhead equipment with X-tree including at least one side gate valve and one master gate valve, as well as underground cutout valve and throttle valve and monitoring and control members, which are installed on the loop, for example, fuse strip and gas line pressure monitoring valve. Operation of the well is performed at simultaneous control of production processes of hydrocarbons by means of the station. Control processes involve opening and closing of shutoff-control valves of well cluster by independent supply of working medium to actuators of shutoff-control valves, as well as flare and loop gate valves, which are arranged on pipelines in close proximity to control cabinet, for example on one common frame with control cabinet. Opening of shutoff-control valves of each well is performed in the following way: underground cutout valve, master gate valve, loop gate valve, side gate valve; closing is performed in the reverse order.

EFFECT: improving operating reliability of shutoff-control valves.

3 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: well cluster includes at least two wells. Each well includes underground operating equipment containing cutout valve and wellhead equipment having casing head, tubing head on which there mounted is X-tree including shutoff members - master and side gate valves. Well cluster is connected to control station of actuators of shutoff members, which is made in the form of a cabinet. Control station includes power lines of function control of shutoff members' actuators. In addition, control lines of loop and flare gate valves are mounted in the cabinet. Loop and flare gate valves are installed on pipelines in close proximity to control cabinet, for example on one common frame.

EFFECT: reducing the surface area occupied with the equipment and increasing cluster operating safety.

12 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: control method of X-tree consists in opening/closing of shutoff-control valves by supplying the working medium to mechanisms of actuators of underground cutout valve, side and master gate valves by means of control station. Control station includes pneumatic hydraulic system connected through monitoring sensors of station operation parameters to control unit of the station. As control unit there used is software-and-hardware system with local control panel containing a display with sensor control to enter commands in on-line mode and local keyboard.

EFFECT: improved operating reliability of the control station and simpler design of the latter.

18 cl, 3 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to operation of oil production wells. Differential filter comprises swelling polymer applied on matrix particles to swell after contact with water to decrease filter permeability. Polymer is selected from polyacrylic acid or polymethacrylic acid, polymaleic anhydride, acrylamide polymer, polyamide, polyester, latex, and polyvinyl alcohol. Method of adjusting water ingress into well comprises incorporating claimed differential filter into wall bottom for operation therein. Note here that differential filter permeability decreases after contact with water.

EFFECT: controlled water ingress.

18 cl, 2 dwg, 1 ex

FIELD: oil and gas industry.

SUBSTANCE: method includes production from a bed with a water-oil mixture in a forced mode, separation of the product into oil and water, and pumping of the released water into the bed for water intake. According to the invention, an overlying bed is opened in the well for water intake, a device is lowered into the well in the form of a lower pump and an upper pump, the inlet device of which is made as a pipe between a casing pipe and a pipe string, providing for total speed of flow during water and oil offtake that is lower than the speed of oil floating in water to separate the product in the well into oil and water. At the same time the released water is pumped with the lower pump into the bed for water intake. Pumps are selected with efficiency corresponding to watering of the bed produce, and total efficiency providing for forced offtake of the product with water and oil mixture. The device comprises pumps with drives made as capable of their serial arrangement on the pipe string in the well and having inlet and outlet devices, and a packer capable of arrangement between beds in the well, one of which is with a water-oil mixture, and the other one is intended for water intake. The inlet device of the upper pump is made as a cylindrical reservoir with an inlet side hole communicated with a bed holding a water-oil mixture, and the outlet device of this pump is made as a valve unit that lets oil through into a pipe string. The outlet device of the lower pump is made in the form of a channel with an injection valve to inject water into a bed intended for water intake, and the inlet device - in the form of a channel with a suction valve for pumping of settled water into the pump. According to the invention, the reservoir is made in the form of a pipe arranged between a casing pipe and a pipe string with the area of the inner circular section that provides for total speed of flow during water offtake with a lower pump and oil with an upper pump, which is lower than the speed of oil floating in water during intensive offtake in the reservoir. The side hole of the reservoir is arranged below the foot of the bed with water-oil mixture and the inlet of the upper pump by at least 1 m. At the same time above the upper bed designed to intake water, between the casing string and the reservoir, which is made as open at the bottom, there is an additional packet installed, and a channel of the outlet device of the lower pump is communicated with an internal packer space of the well, besides, the side hole of the reservoir is arranged above the inlet device of the lower pump at least by 1 m and below the dynamic level of the water and oil contact.

EFFECT: higher oil recovery of producing formations due to lower watering of the products, limitation of water offtake, higher gradient of pressure in borehole environment of the bed.

2 cl

FIELD: oil and gas industry.

SUBSTANCE: method involves extraction of product from formation with water-oil mixture in forced mode, separation of product into oil and water and pumping of separated water to water receiving formation. According to the invention, drilling of lower water receiving formation is performed; device in the form of lower pump and upper pump is lowered into the well; inlet system of the above device is made in the form of a pipe between casing pipe and pipe string, which provides total flow velocity at water and oil extraction, which is less than floating-up velocity of oil in water for separation of product in well into water and oil. Separated water is pumped with lower pump to water receiving formation; at that, pumps are chosen with the capacity corresponding to formation product water content and total capacity providing the forced product extraction from the formation with water-oil mixture. Device includes pumps with drives, which have the possibility of being located in series on pipe string in the well and have inlet and outlet devices, and packer having the possibility of being located between formations in the well, the upper one of which has water-oil mixture, and lower one is intended to receive water. Inlet device of upper pump is made in the form of cylindrical capacity with side inlet hole interconnected with formation containing water-oil mixture, and outlet device of this pump is made in the form of valve unit passing the oil to pipe string. Outlet device of lower pump is made in the form of channel with water delivery valve to the formation intended to receive water, and inlet device is made in the form of channel with suction valve for pumping of settled water to the pump. At that, annular section area outside the capacity is chosen so that maximum flow velocity of water-oil mixture downstream of this section exceeds floating-up velocity of oil in water. At that, capacity is made in the form of a pipe located between casing pipe and pipe string with inner annular section area providing the total flow velocity at water extraction with lower pump and oil extraction with upper pump, which is lower than floating-up velocity of oil in water at intense extraction in the capacity. Side hole of the capacity is located at least 1 m below bottom of formation containing water-oil mixture and inlet of upper pump. At that, inlet device of lower pump is interconnected with the capacity at least 1 m below side hole. Capacity is closed from below with a plug with a connection pipe interconnected with outlet device of lower pump and with borehole space.

EFFECT: increasing oil recovery owing to increasing reservoir coverage coefficient at water flooding at advanced stage of development, and reducing material costs.

3 cl, 1 dwg

FIELD: electric engineering.

SUBSTANCE: the invention relates to submersible electric motors used in pumps. The electric motor comprises a frame, numerous stator laminations inside the frame, several rotors. Each stator lamination has a central window and several slots. The rotors are positioned inside the space formed by the central windows of stator laminations. The coil wires pass through each slot of each stator laminations. The heat shrink tube wraps the coil wires and tightens them into cords. Furthermore, the space between the heat shrink tube around the coil wires and the inner space of stator laminations allows the fluid flow through stator lamination slots. The heat shrink tube is installed into the stator lamination slots to improve the heat transfer in the electric motor. Numerous wires are inserted into the slots in stator laminations. The coil wires are heated, shrinking the heat shrink tube around the coil wires and tightening them into cords, in such a way so the gap between the heat shrink tube and inner surface of the stator laminations allows the fluid flow through wire cords inside the stator laminations.

EFFECT: improved heat transfer during cooling of submersible electric motors used in pumps, improved coil wires protection from wearing.

11 cl, 3 dwg

FIELD: oil producing industry.

SUBSTANCE: invention belongs to the oil producing industry, more specifically, to killing of gas and gas-condensate wells within the framework of well-workover, primarily carried out in productive formations with abnormal low pressure and within the severe environment. Essence of the invention: the production string is filled with sealing composite in the volume equal to the total volume of the production string and the volume of the annular sub-packer space of a well. The sealing composite is pushed into a sub-packer space of a well, gradually pumping the production string with displacement and killing fluid, whereupon the well is left off for return-to-thermal-equilibrium time. After that the completion fluid is pumped into the annular space of a well, pushing out the gas, accumulated in the annular space, and into the completion string leak interval and the upper part of the annular space of a well, where it is gathered in a gas cap and blown off. Subsequently the annular space of a well is filled with a plugging composite with its driving into the completion string leak interval, whereupon the well is left off for about 12 hours. After that the production string upper than the packer and lower than the completion string leak interval is located, through holes are made. Beneath the through holes, from within the production string, a blind plug is placed. He production string is filled with killing fluid, which, while going through holes in the production string, rinses the rests of the plugging composite, displacement and completion fluid from the annular space of a well. The killing fluid supply is ceased, when its density in the annular space equals an initial density.

EFFECT: enhancement of packer well killing security within the conditions of abnormal low pressure and severe environment, more specifically, unpressurized completion string or faulty circulation valve.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: well of hydrocarbon raw material deposit, either gas one or gas-condensate one, includes production string with tubing string with underground operating equipment. Operating equipment includes at least a cutout valve with remote control, which is provided with an actuator, and well head with wellhead equipment. Wellhead equipment comprises casing head, tubing head on which there mounted is X-tree in the form of a fir tree, which includes shutoff members - master and side gate valves with actuators, as well as throttle valve adjacent to the latter, which controls the well flow rate and is provided with an actuator, and monitoring and control members - fuse insert and gas line pressure monitoring valve. Well is connected to control station by means of shutoff members, throttle valve and cutout valve. Control station is made in the form of a cabinet and includes pump accumulator plant and at least one control unit per well.

EFFECT: improving reliability and accident-free operation of gas well and simplifying the control of processes.

12 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: opening and closing of shutoff-control valves of well cluster is performed by independent supply of working medium to actuators of shutoff-control valves and underground cutout valves in the specified sequence, as well as valves controlling the flow rate of each well. Method is implemented by means of control station mounted in the cabinet and including instrumentation and control, as well as hydraulic system. Hydraulic system includes pneumatic hydraulic pressure accumulators combined with working medium tank, pumps, pressure controls and multiplying gears, and has the possibility of controlling actuators of shutoff-control valves with time delay and in certain sequence. At that, in addition, control lines of loop and flare gate valves are mounted in cabinet of the station, which are installed on pipelines in close proximity to control cabinet, for example on one common frame.

EFFECT: invention simplifies mineral deposit production control process, as well as allows reducing the area occupied with process equipment.

21 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: single wells or wells forming clusters are drilled; production wells are equipped with wellhead equipment with X-tree including at least one side gate valve and one master gate valve, as well as underground cutout valve and throttle valve and monitoring and control members, which are installed on the loop, for example, fuse strip and gas line pressure monitoring valve. Operation of the well is performed at simultaneous control of production processes of hydrocarbons by means of the station. Control processes involve opening and closing of shutoff-control valves of well cluster by independent supply of working medium to actuators of shutoff-control valves, as well as flare and loop gate valves, which are arranged on pipelines in close proximity to control cabinet, for example on one common frame with control cabinet. Opening of shutoff-control valves of each well is performed in the following way: underground cutout valve, master gate valve, loop gate valve, side gate valve; closing is performed in the reverse order.

EFFECT: improving operating reliability of shutoff-control valves.

3 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: well cluster includes at least two wells. Each well includes underground operating equipment containing cutout valve and wellhead equipment having casing head, tubing head on which there mounted is X-tree including shutoff members - master and side gate valves. Well cluster is connected to control station of actuators of shutoff members, which is made in the form of a cabinet. Control station includes power lines of function control of shutoff members' actuators. In addition, control lines of loop and flare gate valves are mounted in the cabinet. Loop and flare gate valves are installed on pipelines in close proximity to control cabinet, for example on one common frame.

EFFECT: reducing the surface area occupied with the equipment and increasing cluster operating safety.

12 cl, 5 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention related to oil-and-gas production meant for control of inhibitor supply into natural gas streams, for prevention hydraling process in it. The system consists of pump with drive, pressure collector, pipeline for inhibitor withdrawal from collector, pressure stabilisation independent loops, one of which formed with pressure control instrument in pressure collector, its outlet connected with frequency transformer automatic controller, which its outlet connected with pump drive. The second stabilisation loop forms direct action pressure control block, included in group of withdrawal devices between pressure collector and production devices.

EFFECT: broadening of inhibitor streams control system functionality, supplied through independently controlled canals in every point.

1 dwg

The invention relates to equipment intended for picking wells, and more specifically to mechanisms for actuating tools in downstream wells, require the application of fluid under pressure

The invention relates to safety equipment for the production of hydrocarbons and, in particular, to a system test wells and method of pressure control elements of the system

The invention relates to the oil industry and can be used in the system of collection and treatment of oil, gas and water industries

FIELD: oil-and-gas production.

SUBSTANCE: invention related to oil-and-gas production meant for control of inhibitor supply into natural gas streams, for prevention hydraling process in it. The system consists of pump with drive, pressure collector, pipeline for inhibitor withdrawal from collector, pressure stabilisation independent loops, one of which formed with pressure control instrument in pressure collector, its outlet connected with frequency transformer automatic controller, which its outlet connected with pump drive. The second stabilisation loop forms direct action pressure control block, included in group of withdrawal devices between pressure collector and production devices.

EFFECT: broadening of inhibitor streams control system functionality, supplied through independently controlled canals in every point.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: well cluster includes at least two wells. Each well includes underground operating equipment containing cutout valve and wellhead equipment having casing head, tubing head on which there mounted is X-tree including shutoff members - master and side gate valves. Well cluster is connected to control station of actuators of shutoff members, which is made in the form of a cabinet. Control station includes power lines of function control of shutoff members' actuators. In addition, control lines of loop and flare gate valves are mounted in the cabinet. Loop and flare gate valves are installed on pipelines in close proximity to control cabinet, for example on one common frame.

EFFECT: reducing the surface area occupied with the equipment and increasing cluster operating safety.

12 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: single wells or wells forming clusters are drilled; production wells are equipped with wellhead equipment with X-tree including at least one side gate valve and one master gate valve, as well as underground cutout valve and throttle valve and monitoring and control members, which are installed on the loop, for example, fuse strip and gas line pressure monitoring valve. Operation of the well is performed at simultaneous control of production processes of hydrocarbons by means of the station. Control processes involve opening and closing of shutoff-control valves of well cluster by independent supply of working medium to actuators of shutoff-control valves, as well as flare and loop gate valves, which are arranged on pipelines in close proximity to control cabinet, for example on one common frame with control cabinet. Opening of shutoff-control valves of each well is performed in the following way: underground cutout valve, master gate valve, loop gate valve, side gate valve; closing is performed in the reverse order.

EFFECT: improving operating reliability of shutoff-control valves.

3 cl, 5 dwg

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