Borehole system (versions) and method of using borehole component
SUBSTANCE: this group of inventions refers to the mining industry, and in particular, to the borehole systems and the method of use of the borehole component. The method includes the use in the borehole component the seal having the filler in the form of nanofibre and implementation of the effect of the component within the hole. The system has the downhole tool having compacting element including polymer material. In the polymer material nanosize filler in the form of carbon nanotubes is dispersed.
EFFECT: this invention allows to improve the durability and improve the functioning of the downhole tools operating in the hostile underground environment.
27 cl, 13 dwg
In various subterranean environments, such as environment boreholes, in many cases the use of downhole tools. For example, downhole tools used to ensure completion of wells, can be, for example, packers, safety valves, flow regulators, gas lift valves, sliding sleeves, and other tools. Downhole tools often have parts that are sealed relative to each other by a polymeric sealing components.
Known downhole system containing sealing element includes a polymeric material (see, for example, USSR author's certificate 1460198 A1, published 23.02.1989).
However, borehole or other underground area may create a hostile environment for many materials, including polymeric materials. Excessive heat, high pressure, chemical exposure and other factors can lead to damage or destruction of such materials.
The aim of the present invention is to provide a downhole systems and ways of improvement and use of downhole components, providing increased durability and improved functioning of downhole tools.
According to the invention results from the downhole system containing the downhole tool having a sealing element, kiuchumi polymeric material dispersed therein nanoscale filler, representing a carbon nanotube.
The downhole tool may be a packer, a valve, a sliding sleeve, a pump.
The sealing element can be made in the form of O-ring, may be a T-shaped seal, sealing the package, the seal is activated by a spring, soft seat or bonded seal.
According to the invention results from the downhole system containing the downhole tool having a polymer component containing the package seals, having a group of seals made of elastomeric material dispersed therein nano-filler, and a group of seals, made of thermoplastic material with dispersed therein nanosized filler for modifying material properties of the polymer component.
Nanosized filler may constitute carbon nanotubes, nanofibres, nanoglide or nanoparticles.
According to the invention created a way of using downhole component containing use in downhole component seal with the filler in the form of nanofibres, and the action component in the well.
As a seal, you can use the seal retainer, O-ring, T-ring, package seals, seal associated with d is ratlam, soft saddle.
The action of the downhole component may be the expansion of the packer, valve adjustment, pump action, or extraction of fluid.
Some embodiments of the invention will hereinafter be described with reference to the accompanying figures, which depict the following:
figure 1 is a front view of the system located in the borehole and having a downhole instruments according to a variant of implementation of the present invention;
figure 2 is a schematic view of a variant of implementation of the modified polymer with nannapaneni, which can be used in conjunction with the system presented in figure 1;
figure 3 is a schematic view of another version of the implementation of the modified polymer with nannapaneni, which can be used with the system presented in figure 1;
figure 4 is a front view of the downhole tool, which used a modified polymer with nannapaneni;
figure 5 is a front view of another version of the implementation of the downhole tool, which used a modified polymer with nannapaneni;
6 is a view in cross section of part of a downhole tool having a seal according to another variant implementation of the present invention;
7 pre which is another variant of implementation of the seal, which can be used in conjunction with a downhole tool according to a variant implementation of the present invention;
Fig is another variant implementation of the seal, which can be used in conjunction with a downhole tool according to a variant implementation of the present invention;
Fig.9 represents another variant implementation of the seal, which can be used in conjunction with a downhole tool according to a variant implementation of the present invention;
figure 10 represents another variant implementation of the seal, which can be used in conjunction with a downhole tool according to a variant implementation of the present invention;
11 represents another variant implementation of the seal, which can be used in conjunction with a downhole tool according to a variant implementation of the present invention;
Fig is a schematic view of the instrument containing the seal, according to another variant implementation of the present invention;
Fig is another schematic view of the instrument containing the seal, according to a variant implementation of the present invention.
In the following description numerous details for understanding the present invention. One is to qualified specialists in this field will be clear, that the present invention can be implemented in practice without these details and that many possible changes or modifications with respect to the described variants of implementation of the design.
The present invention relates in General to a system and method for increasing the durability and/or improve the functioning of the downhole tools. The system and method can be used, for example, together with a variety of equipment to complete down-hole and other manufacturing equipment. However, the devices and methods according to the present invention is not limited to their use in those specific cases, which are described here.
Figure 1 shows a downhole system 20 according to a variant implementation of the present invention. In this embodiment, the system 20 is located in an underground environment in the borehole 22. The hole 22 is drilled or otherwise formed in geological formations 24, containing, for example, desired for production fluids, such as fluids based on hydrocarbons. The bore 22 may be lined with casing pipe 26 having perforations 28 through which fluids flow between the formation 24 and the inner space of the borehole 22.
In this embodiment, downhole tools 30 is placed in the hole 22 through 32 of the deployment. Your system is 32 times the stevania can be any of a variety of systems deployment for example, the pipeline for extraction, Flex, cable, or other acceptable devices for deployment. Each of these systems deployment can move downhole tools 30 to the desired location in the well 22. Depending on the specific application types selected downhole tools 30 may be substantially altered. Often downhole tools collect in interacting with them the device and call equipment to complete.
For example, equipment for completion, is presented in figure 1, contains the packer 34, having a polymer sealing element 36. The sealing element 36 may act between the States of compression and expansion in the radial direction to provide a seal with casing pipe 26, as shown. Equipment to complete may further comprise a device 38 for flow control, such as a valve or a sliding clutch. If this equipment is used for feeding the fluid up to the mouth 40 of the borehole, the downhole tools may include a gas or electric outdoor injection system having, for example, submersible motor 44, the safety device 46 of the motor and submersible pump 48, fed by energy from a submersible motor 44. Many of these downhole tools can be powered in order to ensure the surveillance of the production fluid, for example, the valve 38 can be adjusted to control the flow or submersible pump 48 may be actuated to create fluid flow. However, it can be used in a variety of equipment to complete, including equipment for testing wells, equipment for well services and equipment for processing of wells, and used downhole tools chosen based on the type of this equipment.
In various equipment for completions, which are described above, at least some of the downhole tools are used with polymer components, such as sealing element 36. Described in more detail below, that the polymer components using modified polymers with nanoscale filler to improve the properties of the material and thus provide a significant advantage regarding durability and/or operation of downhole tools 30. In the case of the modified polymers with nannapaneni that are used, the components of the filler mainly are nanoscale, typically having a size of about several nanometers. Modified polymers with nannapaneni can provide significant performance improvements compared to the base polymer and reinforced floor the measures using conventional fillers, in which the reinforcing components considerably more, for example with a size of about microns. Polymers with nanoscale fillers demonstrate, for example, improvement in strength, elastic modulus and other properties. Thanks to get a high relative lengthening of the many material properties of modified polymers with nannapaneni significantly improved compared with the properties of conventional polymers or components of the polymers at a much lower volume fraction of the filler with respect to material, non-filler.
Figure 2 shows a variant of the modified polymeric material 50 with nannapaneni. In this embodiment, the material 50 includes a polymeric material 52 formed from polymer chains 54 and a large number of nanofillers 56 serving as agents for cross-linking. In this example, nannapaneni 56 contain nanotubes and/or nanofibres. Nanotubes can be formed in the form of multi-walled nanotubes, carbon nanotubes, single-wall or series of nanotubes. In addition, carbon nanotubes can be formed from different materials, with one example of the material used is carbon. Nanotubes from carbon exhibit highly desirable op is Tania manual thermal and electrical properties for many applications. For example, fillers, carbon nanotubes can be used to greatly increase the strength of the modified polymeric material 50 in tension, to increase the current carrying capacity of the material and to increase the capacity of a material to transfer heat. The improvement of such properties is beneficial for various components of the down-hole, and some of them are discussed in more detail below. On the other hand, nanofibres can be produced, for example, graphite, carbon, glass, cellulosic substrate and polymeric materials.
Another variant implementation of the polymeric material 50 with nannapaneni presented on figure 3. In this embodiment, the polymer material 52 has a polymer chain 54 associated nanofibers 58 containing nanoparticles or nanoglide. Nanoparticles can be produced, for example, from metals, graphite, carbon, diamond, ceramic, metal oxides, other oxides and polymeric materials. Nanoglide can be manufactured, for example, montmorillonite, bentonite, hectorite, attapulgite, kaolin, mica and illite. Some types nanoglide can be used, for example, in cases that are advantageous from the viewpoint of improving the special material properties, such as increased strength is the material 50 at the gap.
The polymer material 52 can be made of different types of simple or modified elastomeric or thermoplastic materials. Examples of elastomers include nitrile rubber, hydronically rubber, carboxyaniline rubber, silicone rubber, rubber-based copolymer of ethylene, propylene and diene polymer elastomers saturated with the main chain and containing fluorine and perforator. Examples of thermoplastic resins include polytetrafluoroethylene (Teflon®), polyetheretherketone, polypropylene, polyethylene and polyster.
These nanocomposites modified polymers can be used in many cases of down-hole, such as seals. Modified polymers with nanosatellites can be used, for example, as a sealing element of the packer 36, O-rings, support rings and other seal types. Nannapaneni 56, 58 can be selected to improve material properties, including improved tensile strength, compressive strength, tensile/shear, modulus, chemical resistance, heat resistance and thermal conductivity/conductivity.
Modified polymers with nannapaneni can be prepared by performing various processes. Examples of such processes include processes is rastvoreniya, the mesophase intermediate processes, the polymerization and the physical mixing or compounding. Additionally, there may be used various ways of curing, including thermal curing, curing by microwave radiation and cured by electron beam radiation. Before fabrication of polymer nanocomposites nannapaneni can also be modified to provide optimal dispersion of nanofillers. In addition, functional nannapaneni can serve as agents for cross-linking in polymer mixtures. Such technologies can be used even for thermoplastic materials with cross connections.
Figure 4 schematically presents one version of the downhole tool 30 in the form of packer 34. Packer 34 is used, for example, to separate the lower part 60 of bore hole 22 of the upper part 62. In the packer 34 used some type of sealing element 36 to form a seal between the body 64 of the packer and the wall of the borehole 22, for example, casing pipe 26 in the desired area of the seal. Advanced sealing element can also be used as an anchor. Thus, the sealing element 36 of the packer 34 may be used in a borehole as plot is to be placed, and as anchor. The downhole tool 30 may also be made in the form of bridge plugs with sealing element 36.
The sealing element 36 is an example of a component of the tool that is at least partially formed of the modified polymers with nannapaneni. The sealing element 36 may also have different configurations, for example, presents a variant has a pair of end rings 66 and a Central element 68. End rings 66 and a Central element 68 is formed of the modified polymers with nannapaneni and may contain a mixture of materials. For example, in one embodiment, the end rings 66 and a Central element 68 can be formed from the modified elastomers with nannapaneni. However, in another embodiment, the Central element 68 is formed from a modified elastomer with nannapaneni, while the end rings 66 are formed from thermoplastic materials with nannapaneni.
Figure 5 presents another variant implementation of the downhole tool 30. The downhole tool may represent, for example, a valve, such as a relief valve or a sliding clutch. In any case, the downhole tool 30 includes a housing 70 having an inner element 72, such as a slide or valve element that is moved about the context of housing 70. Between the housing 70 and the inner member 72 is formed by the seal in the form of sealing element 74, which is located in the desired area of the seals. The sealing element 74 is formed from a modified polymer with a filler to improve the properties of the material of sealing element 74 and thus to increase the durability and/or enhance the functionality of the downhole tool 30. The characteristic shape of the sealing element 74 used in this instrument 30 can vary considerably depending on such factors as performed by the instrument function, the type of tool or environment in which to operate the downhole tool. Examples of different types of seals that may be used in downhole tools are presented and described with reference to Fig.6-11.
As shown in Fig.6, the sealing element 74 is located between the first component 76 and the second component 78, which slides relative to the first component 76. Components performing relative sliding, can be components of a variety of downhole tools, including valves, sliding sleeves and pumps. In this embodiment, the design of the sealing element 74 provides a seal in the form of O-ring 80. Seals in the form of O-ring often serve as a simple but your photos is the R static seals. The sealing element 74 can also include a pair of support rings 82 located on opposite sides of the O-ring 80. The o-ring 80 and the support ring 82 may be made of modified polymers with filler. For example, the O-ring 80 may be made of modified elastomer with filler, and the support ring 82 may be made of reinforced thermoplastic material with filler.
Another example seals are presented in Fig.7. In this embodiment, the sealing element 74 includes a T-shaped seal, generally having a T-shaped Central portion 84 and a pair of reinforcing rings 86. T-ring seals are used in downhole tools that require, for example, providing a two-way dynamic sealing action between the components, making the relative reciprocating movement. Depending on the application of the T-shaped seal may be made of modified thermoplastics with nannapaneni, modified elastomers with nannapaneni or from a combination of two types of polymers.
On Fig in General presents sealing element 74 in the form of a V-shaped package stuffing or Chevron seals. Package Chevron seal includes groups of multicomponent seals, having a large number of sealing protrusions, which actuates the pressure drop. These types of seals are used in a variety of use cases down-hole, thus they are suitable for use as an internal dynamic seal. In the present embodiment, the design package contains seals group 88 and 90 of the seal formed respectively from a soft and relatively hard polymeric materials. For example, group 88 and 90 of the seal can form the package seals of alternating softer and more solid polymeric materials. In this example, group 88 seals formed from the modified elastomeric materials with nannapaneni and group 90 seals formed from modified thermoplastic materials with nannapaneni.
Additional examples of modified polymer seals with nannapaneni presented on figures 9-11. In each of these examples, the sealing element 74 contains a spring-activated seal is formed in the form of unidirectional static or dynamic seals. For example, according to Fig.9 sealing element 74 includes a body 92 of the seal with the sealing surfaces 94 and profound inner portion 96. U-shaped spring 98 is located in the deep portion 96 to provide forced flow platnium the x surfaces 94 in the outer direction.
Figure 10 shows a variant implementation of the design except that the U-shaped spring 98 is replaced by a spring 100, which in General round or oval cross-section. Like the version of the design described with reference to figure 9, the spring 100 moves the sealing surface 94 in the outer direction. Another similar design is presented figure 11. In this example, the body 92 of the seal comprises a pair of adjacent recessed inner portions 96, which contain the spring elements 102. The spring elements 102 can be formed with various configurations, including a pair of U-shaped spring elements, as shown in figure 11. In any of the options presented on Fig.9-11, use modified elastomers or thermoplastics with filler according to the constructive parameters of the downhole tool and/or the environment.
Discussed above modified polymer components with nannapaneni are some examples of components that can be used in the case of down-hole. However, such materials can also be formed by additional types of seals and other components to improve the properties of materials and the creation of downhole tools that are better able to withstand rough underground is diverse environments in which they operate. Examples of other components include soft saddle 106 used in conjunction with the downhole tool 30, as shown in Fig. Soft seat 106 can be used on such a downhole tool as valves. A typical example are the safety valves with soft seat 106 to provide an initial seal between the door 108 and the hard metal seats 110. Such soft seats can be formed from modified thermoplastic or elastomeric materials with nannapaneni.
Another example is the tool 112 with the associated seal 114 formed from the modified polymer material with nannapaneni associated with metal or composite holder 116 in the area of the connection 118. These related seals use a variety of tools 112, including an auxiliary piston, a reciprocating clutch, power pistons and other components. In addition, of the modified polymers with nannapaneni can also be formed components that are not sealing downhole tool.
Although the above described only a few embodiments of the present invention, the qualified experts in this field will easily understand that without substantial rejected the I from the ideas of this invention may be many modifications. Accordingly, it is assumed that such modifications should be included in the scope of this invention, which is defined in the claims.
1. The downhole system containing the downhole tool having a sealing element comprising a polymeric material dispersed therein nanosized filler consisting of a carbon nanotube.
2. The system according to claim 1, in which the downhole tool is a packer.
3. The system according to claim 1, in which the downhole tool is a valve.
4. The system according to claim 1, in which the downhole tool is a sliding clutch.
5. The system according to claim 1, in which the downhole tool is a pump.
6. The system according to claim 1, in which the sealing element is designed in the form of an O-ring.
7. The system according to claim 1, in which the sealing element is a T-shaped seal.
8. The system according to claim 1, in which the sealing element is a sealing package.
9. The system according to claim 1, in which the sealing element is a sealing, spring-activated.
10. The system according to claim 1, in which the sealing element is a soft saddle.
11. The system according to claim 1, in which the sealing element is a bonded seal.
12. The downhole system containing borehole Ann the instruments, having a polymer component containing the package seals, having a group of seals made of elastomeric material dispersed therein nano-filler, and a group of seals, made of thermoplastic material with dispersed therein nanosized filler for modifying material properties of the polymer component.
13. System according to clause 12, in which nanosized filler is a carbon nanotube.
14. System according to clause 12, in which nanosized filler is a nanofibres.
15. System according to clause 12, in which nanosized filler is nanoglide.
16. System according to clause 12, in which nanosized filler is a nanoparticle.
17. The method of using a downhole component containing use in downhole component seal with the filler in the form of nanofibres, and implementation steps of the downhole component in the well.
18. The method according to 17, in which the use of seals in the downhole component is the use of seals in the packer.
19. The method according to 17, in which the seal using O-ring.
20. The method according to 17, in which the seal use a T-ring.
21. The method according to 17, in which the condensed what I use the package seals.
22. The method according to p in which the action of the downhole component is the expansion of the packer.
23. The method according to 17, in which the action of the downhole component is a valve adjustment.
24. The method according to 17, in which the action of the downhole component is a pump action.
25. The method according to 17, in which the action of the downhole component is the extraction fluid.
26. The method according to 17, in which the seal using a soft saddle.
27. The method according to 17, in which the seal using the seal associated with the holder.
23.01.2004 according to claims 1, 2, 6-22, 26, 27;
20.01.2005 on p-5, 23-25.
FIELD: oil and gas production.
SUBSTANCE: invention relates to oil-producing industry, particularly to mechanical packers, used at operation of oil wells by electrically centrifugal pumps. Packer contains mine shaft with threads on butts and axial channel. On external surface of mine shaft it is figured groove, long slot blind below and open in top part of mine shaft. In middle part of mine shaft there are installed rests for cone. In top part of mine shaft by diametre there are implemented transverse slots, in which there are adjusting screws rigidly connecting mine shaft and rest. Under rest there are located sealing elements, cone and iron ring with ability of axial movement relative to mine shaft. In iron ring there are located toothed bowl slip sockets, guide pin and split keys rigidly connecting it to ring in axial direction. Into long slots of ring there are installed screw-thread dies, pressed in radial direction by springs. In area of coupling long slot is overlapped by washers with sealant.
EFFECT: invention provides for simplicity of erection and improvement of abhesion of tube space at usage of electrically centrifugal pump in untight wells.
FIELD: oil and gas production.
SUBSTANCE: invention can be implemented for pull-out of holes, for example for hydraulic break of beds (HBB) operated with one well. The hydro-mechanic packer lowered into a well on a flow string consists of a mandrel made in form of two pipes, of sealing elements with a hold-down device, of an upper anchor with a hydraulic drive, and of a lower anchor with a mechanic drive connected to each other with a bayonet joint. The bayonet joint consists of a bushing with slots located in the upper part of the packer; pins arranged on a bushing in the lower part of the packer come into the slots and interact with surfaces of the slots. Two shaped grooves set off at 180° relative to each other are made on side surface of the upper bushing; the upper part of grooves is conjugated with a cut. Unfolded pattern of each of grooves corresponds to working surface for directing the pin into the above said cut; working surface is situated at acute angle to plane of cross section conjugated with lengthwise cut. Its lower working surface is made at angle to plane of cross section of the packer equal to angle of friction of pair of metals interacting details are made out of; also the said angle is directed counter clockwise, if details of the packer are left sided.
EFFECT: improved operation characteristics.
1 cl, 4 dwg
FIELD: oil and gas production.
SUBSTANCE: invention refers to oil production, particularly to repair and operation of oil and gas wells. The packer for shutting off internal cavity of flow string consists of a case with the central channel and upper and lower stops with a sealing component fixed in between; the sealing component has one thickened and one thin-wall inserted-joint parts; the latter forms a cavity with an external wall of the case communicating with outer space of the facility; also a self-sealing collar is made on external surface of the sealing component. The central channel of the case from below is equipped with a back valve with a saddle secured in the case with a shear screw. The self-sealing collar is designed to let flow up-down, while the cavity communicates with external space via the lower stop; also from above the case is equipped with a hollow branch with a piston, outside of which there is located a cylinder with a collet below, communicated with internal cavity of the sleeve and designed to a restricted motion upwards. Internal surface of the collet is of a cone shape narrowing downward; it interacts with the piston, while external surface is equipped with lugs designed to interact with internal surface of flow string.
EFFECT: reliable operation under high pressure due to more fail-safe insulation of annular space.
FIELD: oil and gas production.
SUBSTANCE: hydraulic packer consists of a hollow mandrel, whereon there are secured an anchor with bowl slip sockets, spring-loaded in radial direction, and a shell forming circular cavity with external surface of the stem; the packer also consists of a sealing component, of a bushing-pusher with radial slots and a radial opening communicating with circular cavity, of cams installed in radial slots of the bushing-pusher, fixing it on the stem and designed to perform axial displacements, of a piston connected to the bushing-pusher with shear screws. A cone is rigidly connected with the piston, a ram holder with radial slots is secured on the stem with shear screws, screw-thread dies with end collars, arranged in radial slots of the ram holder, are assembled on the stem. There is a cylinder fastened on the bushing-pusher and a ratchet assembled on the cylinder for fixing the cylinder relative to the piston. According to the invention the packer is equipped with upper and lower stay nuts with internal circular lug; the nuts are correspondingly secured on the anchor and on the bushing-pusher, with a stop ring installed on the shell and designed to interact with the circular lug of the lower stay nut; also the shell has an external circular lug installed in the anchor, designed to perform axial displacements and to interact with the circular lug of the upper stay nut; while the sealing component is located on the shell between the upper and lower stay nuts.
EFFECT: increased reliability of packer operation.
2 cl, 2 dwg
FIELD: oil and gas production.
SUBSTANCE: group of inventions is related to oil and gas production industry, in particular, to packer systems used to separate annular and tubular spaces of well. Packer system comprising hydraulic packer and anchor, for well with conventional external diametre of shaft of 140-146 mm. Packer comprises shaft, adjusting nut, sealing ferrules, which are installed either on nozzle or shaft, shear screws, hydraulic cylinder-piston, anchoring device of hydraulic action. The latter comprises cone with plates and plate holder, is arranged with the possibility of rest against shaft collar, and is connected to shaft by shear screws. Packer shaft is connected to anchor by upper tube thread. In order to provide for throughput diametre of small packer system within the limits from 55 to 62 mm, provided that dangerous section along shaft body is maintained as at least 7 cm, packer shaft is made, depending on its selected throughput diametre, either with upper and lower combined tubular threads - drilling with end H 60 extended outside and tubing stings 73, smooth or extended, or with upper and lower identical tubular threads - drilling with end H 60 extended outside, or with upper and lower identical tubular threads - tubing strings 73, smooth or extended.
EFFECT: provides for relative high throughput diametre of packer for well with shaft diametre of 140-146 mm, and also improved reliability and efficiency of simultaneous-split operation for producing injection and piezometric wells.
2 cl, 3 ex, 9 dwg
FIELD: oil and gas production.
SUBSTANCE: group of inventions is related to procedure of hydrocarbons production and maintenance of bed pressure. Support-mechanical packer comprises shaft with thrust external collars and grooves for shear screws, which consists of two telescopically mutually connected upper and lower parts with the possibility of their axial displacement relative to each other, and equipped with sealing rings and ferrules, adapter, adjusting nut and fixator. In order to increase serviceability of packer, it is additionally equipped with mechanical anchoring device, which is installed freely under or above sealing ferrules and comprising the following mutually joined components: cone, flat plates and plate holder. In order to increase serviceability and functionality of packer it may be arranged with cable input in the form of sealing longitudinal dead slot on its shaft inside sealing ferrules.
EFFECT: invention objective is to improve reliability and functionality of support-mechanical packer operation.
4 cl, 10 dwg
FIELD: oil and gas production.
SUBSTANCE: invention refers to oil and gas producing industry, particularly to well installations for repeated, including selective, flow tests of flow string in well. The packer consists of a mandrel with a shaped slot on external surface, where axial short and long sections alternate. Self-packing collar, downstream proof, is assembled on the top of the mandrel; a support is located under the collar. A pressure sealing element in form of an additional self-sealing collar, downstream proof, and a cone rigidly fixed relative to the mandrel are successively arranged under the support on the mandrel. A holder with a guiding pin is arranged on the mandrel below the cone. Along circumference the holder is furnished with spring centralisers and oval sockets which are spring loaded inwards in radial direction by means of springs and are designed to interact with the cone in a working position from inside. A rigid centraliser is assembled on the upper end of the mandrel. A rod cupped from top and furnished with radial holes is screwed into the upper end of the mandrel. A load with a chamber at the bottom is arranged outside the rod. The rod is equipped with fingers assembled above radial holes; while the load is equipped with lengthwise through grooves for the fingers of the rod. The lower part of the load chamber, covering radial holes of the rod leak proof by means of sealing elements, is designed to open radial holes of the rod when the load goes up. Correspondingly, process upper radial channels are made in the load above the lengthwise through grooves and the mandrel below the shaped slot; these channels continuously communicate internal space of the load chamber with external space; also there are made lower process channels below which the mandrel is shut off with an additional load. Axial short and long sections of the shaped slot are interconnected with a closed shaped section.
EFFECT: facilitating flow testing of pipes of smaller diametre, also avoiding packer wedging in flow string during round-trips.
FIELD: oil and gas production.
SUBSTANCE: invention refers to construction and operation of oil and gas wells, particularly to sealing of annular space of casing liner in well. The facility consists of a transporting column, of a packer unit in form of a mandrel, of a sealing element installed therein, of cone for the sealing element connected to the mandrel and of a puller interacting with the sealing element. The puller is arranged outside the mandrel and connected to it with at least one shear element; also the puller is connected to the transporting column with a detachable unit. Notably, the facility is equipped with an anchor in its lower part; the anchor serves for engagement with internal relief surface of the liner in its upper part.
EFFECT: facilitates simplification of design of facility, increased reliability of its operation and expanded functionality.
5 cl, 2 dwg
FIELD: oil and gas production.
SUBSTANCE: invention refers to oil and gas industry, notably, to inflated packers. It contains a packer mandrel, a packing element and a swelling material. The packing element is assembled over the packer mandrel; there is a circular gap between the packing element and the mandrel. The material is placed in the circular gap and is designed to capture at least part of medium supplied into the circular gap between the swelling material and the packing element.
EFFECT: facilitates maintaining tightness after expanding regardless of damage or change of conditions in well.
20 cl, 6 dwg
FIELD: oils and gas production.
SUBSTANCE: group of inventions refers to methods and facilities for conservation, completion and repair of wells. The inventions facilitate control over the well during the said operations by means of assembling system of two partitions in well. Each of the partitions is located below the lower end of a flow string for well completion, when this string is installed into the well. As none of these partitions is installed higher in the borehole of the well, so both partitions rest in place during operations of conservation, completion and repair, which eliminates necessity to use a block of blowout preventers to facilitate reliable control over the well.
EFFECT: reduced cost of well construction due to reduced time required for operation of drilling rig.
44 cl, 23 dwg
FIELD: oil and gas extractive industry.
SUBSTANCE: packer has body in form of pipe, whereon collar compactors are placed with limiting washers, saddles for locking tool dropped from surface, cover, upper and lower fixing elements, made in form of anchoring assemblies, upper conical bushing, rigidly connected to pressing bushing and movably to the body, lower conic bushing, made rigidly together with body, guide of this conic bushing made in form of plate spring, placed by one end moveably in guiding groove in lower portion of lower die with teeth, and by other end fixed rigidly on greater diameter of this conic bushing, auxiliary pipe, placed inside the body. Packer in lower portion is provided with check valve, placed inside recess of body, concurrently being also the body of valve. Oppositely to valve saddle on same axis stepped locking bushing is placed with possible sliding inside body recess with limited drive and possible overlapping of radial grooves made in body, which, in its turn, is rigidly connected to auxiliary pipe via shear pin. Between stepped locking bushing and saddle compression spring is placed. Fixing elements of collar compactors are made in form of comb with inner teeth and outer conic generators in nose portion. On the side of collar compactors these are enveloped by inner conic portion of compression bushing, in its turn rigidly connected to upper conic bushing, and on the other side combs with inner teeth are placed sliding-moveably in radial grooves of guiding bushing placed between ends of upper conic bushing and inner conic portion of compression bushing with possible engagement by inner teeth of comb to slanting walls of body groove and interaction to all elements of this assembly.
EFFECT: higher reliability.
FIELD: oil and gas extractive industry.
SUBSTANCE: system has upper and lower packers, each of which has body, shaft, anchor, compactors, and pipes, placed between packers. In shaft of upper packer a copier is made with fixing device of transporting and working position of anchor and a sub. The latter is mounted with possible axial displacement and rotation around the copier. Sub is placed on pipes between packers, mated to lower packer and has no capability for axial rotation and displacement relatively to their axis in operating position of lower packer. On lower packer shaft a copier is made with possible axial displacement with it for interaction with anchor and its displacement from transporting position to operation position.
EFFECT: simplified construction, broader functional capabilities.
FIELD: oil and gas industry.
SUBSTANCE: stand has imitators of casing and lifting columns with packer between them, means for heating casing column imitator, main hydraulic cylinder for axial loading and unloading of packer, pumps to create pressure. Stand is provided with additional hydraulic cylinder with hollow rod and cylinder, connected to rod of min hydraulic cylinder. Additional hydraulic cylinder is encased in the body, rigidly connected to main hydraulic cylinder and imitator of casing column. In additional hydraulic cylinder a ring-shaped piston is placed with conical skirt, interacting with keys with possible periodical supporting against the body through windows in said cylinder and below keys spring-loaded ring-shaped pusher is moveably mounted. In hollow of imitator of lifting column a floating piston is positioned, this hollow and hollow of the hollow rod are interconnected and also connected to hollow above ring-shaped piston.
EFFECT: broader functional capabilities, higher efficiency.
FIELD: oil and gas extractive industry.
SUBSTANCE: device includes hollow body with a row of vertical apertures, a collar, pusher bushing, placed on body with possible interaction with collar, cone, mounted on the body, cylinder, connected to cone, screw-thread dies with die holder, mounted on the body with possible extension of dies in radial direction during interaction with cone, saddle and shear screws. According to invention in die holder additional through radial apertures are made, wherein sockets are mounted with possible extension in radial direction. Inner hollow of die holder is connected to inner hollow of body by a row of radial apertures. In pusher bushing through radial apertures are made, wherein sockets are mounted with possible extension in radial direction. Pusher bushing is rigidly fixed to the body, and its inner hollow is connected to inter-tubular space below the collar.
EFFECT: higher reliability, durability and lower cost.
FIELD: oil industry.
SUBSTANCE: device has body with radial apertures, two compacting assemblies thereon and valve assembly between them. Each compacting assembly comprises a collar, stopping branch pipe, cylinder, forming a ring-shaped hollow with the body, wherein a bushing is placed. In upper compacting assembly ring-shaped hollow is covered by plug from lower side, which is fixed in cylinder and interacts with collar, cylinder is connected to body by cams, placed in radial apertures of plug and in ring groove of body, bushing is made stepped, long step of which interacts with cams and is fixed by shear screws from displacement in ring plane, which is connected to well. In lower compacting assembly bushing is provided with holder, on the body a cone is mounted, interacting with sockets, placed in grooves of stopping branch pipe, which is fixed on the body by shear screws.
EFFECT: higher reliability.
2 cl, 4 dwg
FIELD: oil and gas industry.
SUBSTANCE: device has shaft with radial channels and return valve, upper and lower compacting elements. Inside the shaft a hollow spring-loaded moving rod is placed. It has radial apertures and recesses. Between apertures a throttle is rigidly placed. On upper portion of rod a piston is placed. Working hollow, formed between rod with piston and barrel, fixed on inner portion of shaft, is connected to above-packer space of well by radial aperture, made in barrel wall. Working hollows of upper and lower compacting elements are connected by axial channel, made in shaft and ring channel, formed between inner and outer pipes, connecting lower compacting element to the shaft. On upper portion of pipe through radial apertures are made and cylindrical recess, matching rod diameter, in which rod a plug is place. Outer diameter of upper end portion of rod equals outer diameter of lower rod portion.
EFFECT: higher reliability.
FIELD: oil and gas industry.
SUBSTANCE: packer has body, in which electric engine, reducer with output shaft, connected to screw couple, which is connected to traction, having holding rods on lower portion with spring for transfer of axial force to central rod, having a shelf in upper portion as well as recess and cuts, and in inner portion - compacting rings and stopping nut, are positioned. Packer has shell, having conical surface on inner portion, special part with shelves, shear ring placed in grooves of said special part and holding segments, immobile bushing connected fixedly to special part. Packer has packer rubber, saddle, rigidly connected to special part, moveable flange and two cones, placed oppositely to each other, dies, moveably placed on cones, traction, jointly connected to dies, branch pipe, fixedly placed on body, moveable bushing, balls, pressed by spring and screw for connection of special part to shell, cable of rope, being a carrying cable and feeding electric engine via filament, shear washer, pressed by nut. When packer is removed, engaging assembly is utilized, which includes pusher, screwed on lower portion of screw couple screw, cut holder and cover. Through apertures are made on special part and moveable flange for connection of above-packer and below-packer well hollows.
EFFECT: lower costs and simplified maintenance.
FIELD: oil production industry, particularly means for dividing an annular space and a tube space in flowing, gaslift, and beam wells.
SUBSTANCE: packer includes shaft with outer bored surface and bead and sealing members supported by the bead. Packer also has air cylinder forming annular cavity together with packer shaft. Cavity is connected with shaft interior through radial channels. Packer includes anchoring means. Lower anchoring means includes cone with slips and slip holder having bored inner orifice and threaded orifices. Lower anchoring means rests upon the bead and is connected to the shaft by shear screws installed in threaded orifices of slip holder. Shaft defines inner bored diameter and includes sliding bush located inside shaft. Shaft is provided with lower and upper grooves for sealing rings receiving and with outer grooves for cams and additional shear screws installation. Outer grooves are located between lower and upper ones. Slots are formed below bead on outer shaft surface for installing cams with limited radial travel. Threaded orifices are formed on outer shaft surface above inner groove thereof. Arranged into groove are additional shear screws to secure sliding bush in its initial position. The slip holder is freely installed on shaft or is spring-loaded. Support-moving bush is installed in inner bored orifice of slip holder between shear screws and cams. Support-moving bush is provided with facet formed from cam side and contacts with cams along mating facets upon shearing of shear screws. Free travel between cams and end of support-moving bush exceeds shear screw diameters to provide shearing thereof. When sliding bush is installed in fixed position cams extend above an outer shaft surface generator to provide displacement of support-moving bush and cut of shear screws. When sliding bush is located in operating position cams are located below outer shaft surface generator and move in radial direction into outer groove of sliding bush to provide free cam movement under support-moving bush and shear screws.
EFFECT: reduced number of lowering and lifting operations and breakdowns in the case or packer separation or during packer pulling out of well.
18 cl, 7 dwg
FIELD: oil and gas industry.
SUBSTANCE: device has body, made in form of branch pipe with elastic collar mounted on it, expanding assembly with cone, shear element, gear, lowered on pipes column into additional casing column and interacting with expanding assembly from above. Expanding element is positioned in upper portion of branch pipe and locked with its cone directed downwards, gear is made in form of pusher in lower portion and anchor assembly in upper portion. Pusher is made in form of hydraulic cylinder, made with possible pressure from above on expanding assembly and provided with piston and hollow rod, which is connected to piston rigidly, and to pipes column - hermetically with possible upward axial displacement. Anchor assembly is made in form of dies, mounted on hollow rod with possible radial movement outwards during movement of hollow rod upwards relatively to pipes column. Shear element holds hollow rod relatively to pipes column during lowering into well.
EFFECT: simplified construction, lower costs.
FIELD: mining industry.
SUBSTANCE: device has packer, mounting tool and anchor assembly. Packer expander is mounted in upper portion of body, and anchor assembly - above hydraulic chamber of mounting tool. Hydraulic chamber cylinder is mounted with possible displacement relatively to rod and hydraulically connected to inner space of device. Body of anchor assembly is provided with sockets, in which spring-loaded dies are mounted, which are activated by hydraulic effect formed in tubing pipes column, on which device is lowered into well.
EFFECT: simplified construction, higher reliability, higher efficiency.