Connection assembly and oil production equipment

Abstract

The application relates to the oil production technical field and discloses a connecting assembly and an oil production equipment, the connecting assembly is used for connecting an oil pipe, the connecting assembly comprises an inner pipe, an outer pipe, an adapter and a capsule. One end of the inner pipe is used for being arranged in the oil pipe. One end of the outer pipe is used for being sleeved outside the oil pipe, and a first cavity is arranged between the other end of the outer pipe and the other end of the inner pipe. One end of the adapter is arranged in the first cavity, and the adapter is provided with a first channel which is communicated with the first cavity. One end of the capsule is connected to the other end of the adapter, the inside of the capsule is communicated with the first channel, and the inside of the capsule is used for containing fluid. Wherein, the first cavity, the first channel and the capsule are respectively used for allowing a cable of the oil pipe to pass through. Through the above mode, the application can reduce the problem that a part of the cable passing out of the connecting assembly and the connecting assembly are prone to sealing failure due to a large pressure difference between external well fluid and the inside of the capsule.

Description

Technical Field

[0001] This application relates to the field of oil production technology, and in particular to a connecting component and oil production equipment. Background Technology

[0002] When submersible screw pump units of oil production equipment operate in the underground environment of an oilfield, they need to be connected to surface equipment through a connecting assembly. The connecting assembly includes a power cable and the connecting assembly itself. The power cable runs through the connecting assembly, and one end of the power cable extends from the connecting assembly toward the submersible screw pump unit and connects to the submersible screw pump unit. Since the side of the connecting assembly facing the submersible screw pump unit is connected to the space inside the oil well, a sealing structure needs to be set between the power cable and the connecting assembly to ensure a sealed connection between the power cable and the connecting assembly. The existing sealing structure between the power cable and the connecting assembly has poor sealing effect and is difficult to meet the requirements of downhole operations. Utility Model Content

[0003] In view of the problems existing in the background art, the purpose of this application is to provide a connection component and oil production equipment that overcomes or at least partially solves the above problems.

[0004] According to a first aspect of this application, a connecting assembly is provided for connecting an oil pipe. The connecting assembly includes an inner tube, an outer tube, an adapter, and a capsule. One end of the inner tube is inserted into the oil pipe. One end of the outer tube is fitted over the oil pipe, and a first chamber is provided between the other end of the outer tube and the other end of the inner tube. One end of the adapter is inserted into the first chamber, and the adapter has a first channel communicating with the first chamber. One end of the capsule is connected to the other end of the adapter, and the interior of the capsule communicates with the first channel, and the interior of the capsule is used to contain fluid. The first chamber, the first channel, and the capsule are respectively used for the passage of cables from the oil pipe.

[0005] In one or more of the above optional embodiments, the adapter includes a first main body disposed between the outer tube and the capsule. The adapter also includes a first mounting portion connected to the end of the first main body facing the capsule, with one end of the capsule sleeved outside the first mounting portion; and / or, the adapter further includes a second mounting portion connected to the end of the first main body facing the outer tube, with one end of the outer tube sleeved outside the second mounting portion.

[0006] In one or more of the above optional embodiments, the connecting assembly further includes an adapter pipe, one end of which is connected to the end of the adapter opposite to the inner tube, and the interior of the adapter pipe is in communication with the interior of the inner tube. The capsule is fitted over the adapter pipe, and a second chamber is provided between the capsule and the adapter pipe. The end of the first channel opposite to the first chamber is connected to the second chamber. The second chamber is used to contain fluid and also to allow the cable of the oil supply pipe to pass through.

[0007] In one or more of the above optional embodiments, the adapter is provided with a first mounting hole, and the inner tube and the adapter tube are respectively inserted through the two ends of the first mounting hole; and / or, the adapter is provided with a second channel, which is respectively connected to the first chamber and the second chamber.

[0008] In one or more of the above optional embodiments, the adapter includes a second main body and a third mounting part connected to each other. The end of the second main body away from the third mounting part is connected to the adapter, and the end of the capsule away from the adapter is sleeved on the third mounting part. A second chamber is provided between the capsule and the second main body.

[0009] In one or more of the above optional embodiments, the third mounting part is provided with a third channel, which extends from one end of the third mounting part toward the second chamber to the other end of the third mounting part, and the third channel is used for the cable of the oil supply pipe to pass through.

[0010] In one or more of the above optional embodiments, the connecting assembly further includes a first seal disposed within the third channel, the first seal being for the passage of the oil supply cable.

[0011] In one or more of the above optional embodiments, the connecting assembly further includes a clamping member abutting against one end of the first seal opposite to the second chamber, the clamping member being at least partially disposed within the third channel; or, the connecting assembly further includes a clamping member and a gasket, the gasket being disposed within the third channel, the clamping member being at least partially disposed within the third channel, and the gasket being disposed between the first seal and the clamping member.

[0012] In one or more of the above optional embodiments, the third mounting part is provided with a liquid injection channel, which extends from one end of the third mounting part toward the second chamber to the other end of the third mounting part.

[0013] In one or more of the above optional embodiments, the connecting assembly further includes a first retaining ring, which is sleeved on the end of the capsule near the adapter and is used to fix one end of the capsule to the adapter; and / or, the connecting assembly further includes a second retaining ring, which is sleeved on the end of the capsule away from the adapter and is used to fix the other end of the capsule to the adapter tube.

[0014] In one or more of the above optional embodiments, the connecting assembly further includes a protective tube, which is sleeved outside the capsule, with one end of the protective tube connected to the adapter and the other end of the protective tube connected to the third mounting part.

[0015] According to a second aspect of this application, an oil production device is provided, including an oil pipe and the aforementioned connecting assembly, one end of which is connected to the oil pipe.

[0016] The beneficial effects of the embodiments of this application are: the connecting component provided in the embodiments of this application adjusts the pressure difference between the inside of the capsule and the outside well fluid by expanding or contracting the capsule, which helps to reduce the problem of the cable passing through the connecting component and the easy failure of the seal between the connecting components due to the large pressure difference between the outside well fluid and the inside of the capsule. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 A perspective view of a connecting assembly with an oil pipe installed, provided in an embodiment of this application;

[0019] Figure 2 This is a cross-sectional schematic diagram of a connecting assembly with an oil pipe installed, provided as an embodiment of this application.

[0020] Figure 3 A partial cross-sectional schematic diagram of a connecting component provided in an embodiment of this application;

[0021] Figure 4 This is a partial exploded view of a connection component provided in an embodiment of this application. Detailed Implementation

[0022] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0024] In the description of this specification, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0026] Please see Figures 1-3 The connecting assembly 100 includes an inner tube 1, an outer tube 2, an adapter 3, and a capsule 4. One end of the inner tube 1 is inserted into the oil pipe 200, and one end of the outer tube 2 is fitted over the oil pipe 200. A first chamber a is provided between the other end of the outer tube 2 and the other end of the inner tube 1. One end of the adapter 3 is inserted into the first chamber a, and the adapter 3 has a first channel b communicating with the first chamber a. One end of the capsule 4 is connected to the other end of the adapter 3, and the interior of the capsule 4 communicates with the first channel b. The interior of the capsule 4 is used to contain fluid. The first chamber a, the first channel b, and the capsule 4 are used for the cable 202 of the oil pipe 200 to pass through.

[0027] When the connecting component 100 is used in the oil production equipment to work in the oil well, the cable 202 of the tubing 200 passes through the first chamber a, the first channel b and the capsule 4. The connecting component 100 is immersed in the well fluid. The capsule 4 is filled with insulating oil. When the pressure of the well fluid in the oil well is greater than the pressure of the insulating oil in the capsule 4, the capsule 4 shrinks and its volume decreases. When the pressure of the well fluid in the oil well is less than the pressure of the insulating oil in the capsule 4, the capsule 4 expands and its volume increases. The capsule 4 is adjusted by expansion or contraction to reduce the pressure difference between the inside and outside of the well fluid.

[0028] The connecting component 100 provided in this application embodiment adjusts the pressure difference between the inside of the capsule 4 and the external well fluid by expanding or contracting the capsule 4. This helps to reduce the problem of easy sealing failure between the part 2021 of the cable 202 passing through the connecting component 100 and the connecting component 100 due to the large pressure difference between the external well fluid and the inside of the capsule 4.

[0029] In some embodiments, the inner wall of the end of the outer tube 2 away from the adapter 3 is provided with a first serrated protrusion 21 arranged along the axial direction of the outer tube 2. The first serrated protrusion 21 is used to increase the friction between the inner wall of the outer tube 2 and the outer wall of the oil pipe 200 to prevent the oil pipe 200 from moving axially relative to the outer tube 2.

[0030] In some embodiments, the outer wall of the end of the inner tube 1 away from the adapter 3 is provided with a second serrated protrusion 11 arranged along the axial direction of the inner tube 1. The second serrated protrusion 11 is used to increase the friction between the outer wall of the inner tube 1 and the inner wall of the oil pipe 200 to prevent the oil pipe 200 from moving axially relative to the inner tube 1.

[0031] In some embodiments, the inner wall of the oil pipe 200 defines a first liquid passage c extending along the axial direction of the oil pipe 200 and penetrating the oil pipe 200, and the inner wall of the inner pipe 1 defines a second liquid passage d extending along the axial direction of the inner pipe 1 and penetrating the inner pipe 1, the second liquid passage d being used to communicate with the first liquid passage c.

[0032] Please see Figure 2 and Figure 4 In some embodiments, the adapter 3 includes a first main body 31 disposed between the outer tube 2 and the capsule 4; the adapter 3 also includes a first mounting part 32 connected to the end of the first main body 31 facing the capsule 4, and one end of the capsule 4 is sleeved outside the first mounting part 32; and / or, the adapter 3 also includes a second mounting part 33 connected to the end of the first main body 31 facing the outer tube 2, and one end of the outer tube 2 is sleeved outside the second mounting part 33.

[0033] In some embodiments, the outer wall of the second mounting portion 33 is provided with a first external thread (not shown), and the inner wall of the outer tube 2 near the first chamber a is provided with a first internal thread (not shown). The end of the outer tube 2 near the first chamber a is screwed to the first external thread of the second mounting portion 33 by the first internal thread.

[0034] In some embodiments, the outer wall of the second mounting part 33 is provided with a first annular groove 331, and the connecting assembly 100 further includes a first sealing ring (not shown). The first sealing ring is disposed in the first annular groove 331 along the radial direction of the outer tube 2. One end of the first sealing ring abuts against the bottom of the first annular groove 331, and the other end of the first sealing ring abuts against the inner wall of the outer tube 2.

[0035] In other embodiments, the outer wall of the second mounting portion 33 is welded to the inner wall of the outer tube 2 near the first chamber a.

[0036] Please see Figures 2-4 In some embodiments, the connecting assembly 100 includes an adapter pipe 5, one end of which is connected to the end of the adapter 3 opposite to the inner tube 1, and the interior of the adapter pipe 5 is in communication with the interior of the inner tube 1. A capsule 4 is fitted over the adapter pipe 5, and a second chamber h is provided between the capsule 4 and the adapter pipe 5. The end of the first channel b opposite to the first chamber a is connected to the second chamber h. The second chamber h is used to contain fluid and also to allow the cable 202 of the oil pipe 200 to pass through.

[0037] In some embodiments, the adapter 3 is provided with a first mounting hole 3a, and the inner tube 1 and the adapter tube 5 are respectively inserted through the two ends of the first mounting hole 3a; and / or, the adapter 3 is provided with a second channel e, which connects the first chamber a and the second chamber h respectively. During operation, insulating oil can flow between the first chamber a and the inside of the capsule 4 through the second channel e. The insulating oil plays an insulating and sealing role in the first chamber a, and the pressure difference between the first chamber a and the external well fluid is reduced by the expansion or contraction of the capsule 4.

[0038] In some embodiments, the first mounting hole 3a passes through the first main body 31, the first mounting part 32 and the second mounting part 33, the end of the inner tube 1 near the first chamber a passes through the end of the first mounting hole 3a near the second mounting part 33, and the end of the adapter tube 5 near the first chamber a is inserted into the end of the first mounting hole 3a near the first mounting part 32.

[0039] In some embodiments, the inner wall of the first mounting hole 3a is provided with a second internal thread (not shown), and the outer wall of the inner tube 1 near the first chamber a is provided with a second external thread (not shown). The end of the inner tube 1 near the first chamber a is screwed to the second internal thread of the first mounting hole 3a by the second external thread.

[0040] In some embodiments, the outer wall of the inner tube 1 near the first chamber a is provided with a second annular groove 12. The connecting assembly 100 also includes a second sealing ring (not shown). The second sealing ring is disposed in the second annular groove 12 along the radial direction of the first mounting hole 3a. One end of the second sealing ring abuts against the bottom of the second annular groove 12, and the other end of the second sealing ring abuts against the inner wall of the first mounting hole 3a.

[0041] In other embodiments, the outer wall of the inner tube 1 at one end near the first chamber a is welded to the inner wall of the first mounting hole 3a.

[0042] In some embodiments, the adapter tube 5 includes a second main body portion 52 and a third mounting portion 51 connected to each other. The end of the second main body portion 52 away from the third mounting portion 51 is connected to the adapter 3. The end of the capsule 4 away from the adapter 3 is sleeved on the third mounting portion 51. A second chamber h is provided between the capsule 4 and the second main body portion 52.

[0043] In some embodiments, the third mounting portion 51 is disposed around the outer peripheral wall of the second main body portion 52.

[0044] In some embodiments, the third mounting portion 51 is provided with a third channel f, which extends from one end of the third mounting portion 51 toward the second chamber h to the other end of the third mounting portion 51, and the third channel f is used for the cable 202 of the oil pipe 200 to pass through.

[0045] In some embodiments, the second body portion 52 is generally tubular, and the inner wall of the second body portion 52 defines a third liquid passage g that extends along the adapter 3 toward the third mounting portion 51 and passes through the second body portion 52. The third liquid passage g and the second liquid passage d are connected through the first mounting hole 3a.

[0046] In some embodiments, the outer wall of the end of the second main body 52 away from the third mounting part 51 is provided with a third external thread (not shown), and the inner wall of the first mounting hole 3a is provided with a third internal thread (not shown). The end of the second main body 52 away from the third mounting part 51 is screwed to the third internal thread of the first mounting hole 3a by the third external thread.

[0047] In some embodiments, the inner wall of the first mounting hole 3a is provided with a third annular groove 311, and the connecting assembly 100 further includes a third sealing ring (not shown). The third sealing ring is disposed in the third annular groove 311 along the radial direction of the first mounting hole 3a. One end of the third sealing ring abuts against the bottom of the third annular groove 311, and the other end of the third sealing ring abuts against the outer wall of the end of the second main body 52 away from the third mounting part 51.

[0048] In some embodiments, the first main body 31 has one end of the first mounting part 32, the inner wall of the capsule 4, the outer wall of the second main body 52, and the end of the third mounting part 51 facing the adapter 3 together to form a second chamber h. The second chamber h is connected to the first chamber a through the second channel e, and the second chamber h is connected to the third channel f.

[0049] In some embodiments, the connection assembly 100 further includes a first seal 6 disposed within the third channel f, the first seal 6 being used for the cable 202 of the oil pipe 200 to pass through.

[0050] In some embodiments, the first seal 6 is a sealing ring. It is understood that the first seal 6 is not limited to the sealing ring described above. In some embodiments, the first seal 6 may also be a sealing material (such as potting compound) filled between the inner wall of the cable 202 and the third channel f.

[0051] In some embodiments, the connecting assembly 100 further includes a clamping member 7, which abuts against the end of the first seal 6 away from the second chamber h, and the clamping member 7 is at least partially disposed within the third channel f; or, the connecting assembly 100 further includes a clamping member 7 and a gasket 8, the gasket 8 being disposed within the third channel f, the clamping member 7 being at least partially disposed within the third channel f, and the gasket 8 being disposed between the first seal 6 and the clamping member 7.

[0052] In some embodiments, the third channel f includes a first through hole f1 and a first mounting groove f2 arranged sequentially along the direction from the adapter 3 to the third mounting part 51. The opening of the first mounting groove f2 is arranged in the direction from the adapter 3 to the third mounting part 51. The first through hole f1 communicates with the bottom of the first mounting groove f2. The first sealing member 6 is disposed in the first mounting groove f2.

[0053] In some embodiments, the clamping member 7 is at least partially disposed in the first mounting groove f2.

[0054] In some embodiments, the inner wall of the first mounting groove f2 is provided with a fourth internal thread (not shown), and the outer wall of the clamping member 7 is provided with a fourth external thread (not shown). Along the groove opening of the first mounting groove f2 toward the bottom of the first mounting groove f2, the fourth external thread is screwed into the fourth internal thread.

[0055] In some embodiments, the gasket 8 is disposed in the first mounting groove f2.

[0056] In some embodiments, the third mounting portion 51 is provided with a liquid injection channel i, which extends from one end of the third mounting portion 51 toward the second chamber h to the other end of the third mounting portion 51. The liquid injection channel i is used to inject fluid into the capsule 4.

[0057] In some embodiments, the connection assembly 100 includes a second seal 9, which is installed on the injection channel i to close the injection channel i.

[0058] In some embodiments, the second seal 9 is a sealing plug, and the second seal 9 is inserted into the injection channel i.

[0059] In some embodiments, the injection channel i includes a second through hole i1 and a second mounting groove i2 arranged sequentially along the direction from the adapter 3 to the third mounting part 51. The opening of the second mounting groove i2 is arranged in the direction from the adapter 3 to the third mounting part 51. The second through hole i1 communicates with the bottom of the second mounting groove i2. Along the direction from the third mounting part 51 to the adapter 3, the second seal 9 is inserted into the second mounting groove i2 and abuts against the bottom of the second mounting groove i2.

[0060] In some embodiments, the connecting assembly 100 further includes a first retaining ring 41, which is sleeved on the end of the capsule 4 near the adapter 3 and is used to fix one end of the capsule 4 to the adapter 3; and / or, the connecting assembly 100 further includes a second retaining ring 42, which is sleeved on the end of the capsule 4 away from the adapter 3 and is used to fix the other end of the capsule 4 to the adapter tube 5.

[0061] In some embodiments, the connecting assembly 100 further includes a protective tube 10, which is sleeved over the capsule 4. One end of the protective tube 10 is connected to the adapter 3, and the other end is connected to the third mounting part 51. By providing the protective tube 10, the capsule 4 is protected, which helps to reduce the problem of damage caused by the capsule 4 colliding with external foreign objects during the installation of the connecting assembly 100 in the well.

[0062] In some embodiments, the protective pipe 10 is provided with a connecting hole j, which connects the inside of the protective pipe 10 with the outside of the protective pipe 10. During operation, well fluid outside the protective pipe 10 can enter the inside of the protective pipe 10 through the connecting hole j.

[0063] In some embodiments, one end of the protective tube 10 is sleeved on the outer wall of the first main body 31 near the third mounting portion 51. Along the direction from the adapter 3 towards the third mounting portion 51, the third mounting portion 51 includes a first annular portion 511 and a second annular portion 512 arranged sequentially. The second annular portion 512 protrudes radially from the first annular portion 511. The end of the capsule 4 away from the adapter 3 is sleeved on the outer wall of the first annular portion 511, and the other end of the protective tube 10 is sleeved on the outer wall of the second annular portion 512. A communicating cavity k is provided between the protective tube 10 and the adapter 5, and the capsule 4 is disposed within the communicating cavity k.

[0064] Based on the same inventive concept, this application also provides an oil production device, including an oil pipe 200 and a connecting component 100 in any of the above embodiments, one end of the connecting component 100 being connected to the oil pipe 200.

[0065] Please see Figures 1-3 In some embodiments, the tubing 200 includes a pipe body 201 made of non-metallic composite material and a cable 202. The cable 202 is embedded in the pipe body 201. One end of the cable 202 passes through the end of the pipe body 201 toward the adapter 3 and passes through the first chamber a, the first channel b and the capsule 4.

[0066] In some embodiments, the inner tube 1 and the outer tube 2 are fixed to the oil pipe 200 by extrusion deformation. Specifically, the inner tube 1 is expanded outward by an extrusion tool, and the outer tube 2 is reduced in diameter inward by an extrusion tool, so that the outer tube 2 and the inner tube 1 clamp and extrude the pipe body 201 of the oil pipe 200, thereby fixing the pipe body 201 of the oil pipe 200 between the inner wall of the outer tube 2 and the outer wall of the inner tube 1.

[0067] In some embodiments, a fourth sealing ring (not shown) is provided between the inner wall of the outer tube 2 and the outer wall of the tube body 201 to seal the gap between the inner wall of the outer tube 2 and the outer wall of the tube body 201, and a fifth sealing ring (not shown) is provided between the outer wall of the inner tube 1 and the inner wall of the tube body 201 to seal the gap between the outer wall of the inner tube 1 and the inner wall of the tube body 201.

[0068] In some embodiments, the oil production equipment includes a submersible screw pump unit, a tree, and a control cabinet. The submersible screw pump is installed in the oil well for oil production operations, while the tree and control cabinet are located on the surface. One end of the adapter pipe 5, away from the adapter 3, is connected to the submersible screw pump unit. The end of the tubing 200, away from the connecting assembly 100, is connected to the tree. The submersible screw pump unit sequentially delivers oil through a third fluid passage g, a second fluid passage d, and a first fluid passage c to the tree. One end of the cable 202 extending from the connecting assembly 100 is electrically connected to the submersible screw pump unit, and the other end of the cable 202 is electrically connected to the control cabinet, which is used to control the operation of the submersible screw pump unit.

[0069] The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A connecting assembly for connecting an oil pipe, characterized in that, include: An inner tube, one end of which is used to pass through the oil pipe; An outer tube, one end of which is fitted over the oil pipe, and a first chamber is provided between the other end of the outer tube and the other end of the inner tube; An adapter, one end of which passes through the first chamber, and the adapter is provided with a first channel communicating with the first chamber; A capsule, one end of which is connected to the other end of the adapter, the interior of which is connected to the first channel, and the interior of which is used to contain fluid; The first chamber, the first channel, and the capsule are respectively used for the passage of the oil supply cable.

2. The connection component according to claim 1, characterized in that, The adapter includes a first main body portion, which is disposed between the outer tube and the capsule; The adapter further includes a first mounting portion, which is connected to the end of the first main body facing the capsule, and one end of the capsule is fitted over the first mounting portion; and / or The adapter also includes a second mounting part, which is connected to one end of the first main body facing the outer tube, and one end of the outer tube is sleeved outside the second mounting part.

3. The connection component according to claim 1, characterized in that, The connecting assembly further includes an adapter pipe, one end of which is connected to the end of the adapter opposite to the inner tube, and the interior of the adapter pipe is in communication with the interior of the inner tube; The capsule is fitted over the adapter tube, and a second chamber is provided between the capsule and the adapter tube. The end of the first channel opposite to the first chamber is connected to the second chamber. The second chamber is used to contain fluid and is also used for the passage of the oil supply cable.

4. The connecting component according to claim 3, characterized in that, The adapter is provided with a first mounting hole, and the inner tube and the adapter tube respectively pass through the two ends of the first mounting hole; and / or, The adapter is provided with a second channel, which connects the first chamber and the second chamber respectively.

5. The connecting component according to claim 3, characterized in that, The adapter includes a second main body and a third mounting part connected to each other. The end of the second main body away from the third mounting part is connected to the adapter. The end of the capsule away from the adapter is sleeved on the third mounting part. A second chamber is provided between the capsule and the second main body.

6. The connecting component according to claim 5, characterized in that, The third mounting part is provided with a third channel, which extends from one end of the third mounting part toward the second chamber to the other end of the third mounting part, and the third channel is used for the cable of the oil supply pipe to pass through.

7. The connecting component according to claim 6, characterized in that, The connection assembly further includes a first seal disposed within the third channel, the first seal being used for the passage of the oil supply cable.

8. The connection component according to claim 7, characterized in that, The connecting assembly further includes a clamping member abutting against the end of the first seal member opposite to the second chamber, the clamping member being at least partially disposed within the third channel; or... The connecting assembly further includes a clamping member and a gasket, the gasket being disposed within the third channel, the clamping member being at least partially disposed within the third channel, and the gasket being disposed between the first sealing member and the clamping member.

9. The connecting component according to claim 5, characterized in that, The third mounting part is provided with a liquid injection channel, which extends from one end of the third mounting part toward the second chamber to the other end of the third mounting part.

10. The connecting component according to any one of claims 3-9, characterized in that, The connecting assembly further includes a first retaining ring, which is sleeved on the end of the capsule near the adapter, and is used to fix one end of the capsule to the adapter; and / or The connecting assembly further includes a second retaining ring, which is sleeved on the end of the capsule away from the adapter and is used to fix the other end of the capsule to the adapter tube.

11. The connecting component according to any one of claims 5-9, characterized in that, The connecting assembly also includes a protective tube, which is sleeved over the capsule. One end of the protective tube is connected to the adapter, and the other end of the protective tube is connected to the third mounting part.

12. An oil extraction device, characterized in that, include: oil pipe; The connecting assembly as described in any one of claims 1-11, wherein one end of the connecting assembly is connected to the oil pipe.

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