Male Plug Assembly, Female Plug Assembly, Fishing Cable Connector and Oil Production Equipment

Abstract

This application relates to the technical field of oil production equipment, and discloses a male plug assembly, a female plug assembly, a fishing cable connector, and an oil production equipment. The male plug assembly includes a first end and a second end disposed opposite to each other along the axial direction; it further includes a central conductive column, a first insulating layer, at least one first conductor layer, and at least one second conductor layer; along the direction towards the first end, one end of the central conductive column is provided with a first insertion portion; the first insulating layer is coated outside the central conductive column, and along the direction towards the first end, the first insertion portion protrudes from the first insulating layer; at least one first conductor layer is sequentially sleeved, and at least one first conductor layer includes a first inner conductor layer at the innermost layer. The first inner conductor layer is coated outside the first insulating layer. Along the direction towards the first end, at least one first conductor layer is respectively provided with a second insertion portion, and the second insertion portions of at least one first conductor layer are sequentially distributed along the axial direction; each second insulating layer is disposed between two adjacent first conductor layers corresponding to each other.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of oil production equipment, and in particular, to a male plug assembly, a female plug assembly, a fishing cable connector, and an oil production equipment. Background Art

[0002] Conventional fishing cable connectors are divided into two parts when applied in oil wells: an upper joint and a lower joint. The docking method of the upper and lower joints is the traditional three-core plug docking method. The upper joint is lowered into the oil pipe through a flexible cable of several kilometers to dock with the lower joint. Since it is a three-core plug and uses the traditional plugging method for docking, the docking needs to be carried out in an insulating medium, making it difficult to achieve underwater docking, and it is easy to have situations such as jamming or improper docking during docking, resulting in docking failures. Summary of the Invention

[0003] In view of the above problems, the embodiments of the present application provide a male plug assembly, a female plug assembly, a fishing cable connection device, and an oil production equipment to facilitate the plugging of the upper and lower joints of the fishing cable connector.

[0004] According to a first aspect of the embodiments of the present application, a male plug assembly is provided, including a first end and a second end oppositely arranged along the axis, and the first end is used for plugging with a female plug assembly; the male plug assembly further includes a central conductive column, a first insulating layer, at least one first conductor layer, and at least one second insulating layer; along the direction towards the first end, one end of the central conductive column is provided with a first plugging portion; the first insulating layer is coated outside the central conductive column, and along the direction towards the first end, the first plugging portion protrudes from the first insulating layer; the at least one first conductor layer is sleeved in sequence, and the at least one first conductor layer includes a first inner conductor layer in the innermost layer, the first inner conductor layer is coated outside the first insulating layer, and along the direction towards the first end, the at least one first conductor layer is respectively provided with a second plugging portion, and the second plugging portions of the at least one first conductor layer are distributed in sequence along the axis; each second insulating layer is arranged between two adjacent first conductor layers corresponding to it.

[0005] In one or more of the above optional embodiments, along the direction towards the first end, the first insulating layer protrudes from the first inner conductor layer.

[0006] In one or more of the above optional embodiments, along the direction towards the first end, each second insulating layer protrudes from the first conductor layer outside it.

[0007] In one or more optional embodiments above, the first insulating layer includes a first isolation portion and a first end portion, the first end portion is connected to one end of the first isolation portion facing the first end, the first end portion facing the first isolation portion is provided with a first step surface, the first end portion facing away from the first isolation portion is provided with a first inclined surface, the first isolation portion is arranged between the central conductive column and the first inner conductor layer, the first step surface abuts the first inner conductor layer, and the first inclined surface is used for guiding during insertion.

[0008] In one or more optional embodiments above, each second insulating layer includes a second isolation portion and a second end portion, the second end portion is connected to one end of the second isolation portion facing the first end, the second end portion facing the second isolation portion is provided with a second step surface, the second end portion facing away from the second isolation portion is provided with a second inclined surface, the second isolation portion is arranged between two corresponding adjacent first conductor layers, the second step surface abuts against the first conductor layer close to the outer layer, and the second inclined surface is used for guiding during insertion.

[0009] In one or more optional embodiments above, the male plug assembly further includes a first adapter and a first wire, one end of the first adapter is connected to the first wire, and the other end of the first adapter is connected to one end of the center conductive column toward the second end.

[0010] In one or more optional embodiments above, the male plug assembly further includes a second adapter and a second wire, one end of the second adapter is connected to the second wire, and the other end of the second adapter is connected to an end of the first conductor layer toward the second end.

[0011] In one or more of the above optional embodiments, the at least one first conductor layer comprises an outermost first outer conductor layer;

[0012] The male plug assembly also includes a first outer insulating layer, a supporting layer and a sleeve, the first outer insulating layer is coated on the outside of the first outer conductor layer, the supporting layer is coated on the outside of the first outer insulating layer, one end of the sleeve is sleeved on the outside of the supporting layer, and the first adapter and the second adapter are arranged in the sleeve.

[0013] In one or more optional embodiments above, the male plug assembly includes a limiting cylinder, the limiting cylinder is connected to an end of the sleeve facing away from the supporting layer, and the limiting cylinder is used for limiting the position during insertion.

[0014] In one or more of the above optional embodiments, the male plug assembly further includes a locking pin movably disposed in the limiting cylinder. The locking pin is movable in the radial direction of the limiting cylinder and is used to move partially out of the limiting cylinder to lock with the female plug assembly.

[0015] In one or more of the above optional embodiments, the limiting cylinder includes a locking hole extending from the outer wall of the limiting cylinder towards the inner wall of the limiting cylinder. The locking pin is movably disposed in the locking hole.

[0016] The male plug assembly further includes an elastic member. One end of the elastic member abuts against the locking pin, and the elastic member can drive the locking pin to move towards the inner wall of the limiting cylinder so that the locking pin is received in the locking hole.

[0017] In one or more of the above optional embodiments, the male plug assembly further includes an attracting member disposed on the locking pin. The attracting member can drive the locking pin to move towards the outer wall of the limiting cylinder so that the locking pin partially extends out of the locking hole.

[0018] According to the second aspect of the present application, a female plug assembly is provided, including a third end and a fourth end oppositely disposed along the axis. The third end is used for plugging with the male plug assembly. The female plug assembly further includes a central conductor layer, a third insulating layer, at least one second conductor layer, and at least one fourth insulating layer. The central conductor layer is provided with a first plugging hole. The third insulating layer is coated outside the central conductor layer. The at least one second conductor layer is sleeved in sequence. The at least one second conductor layer includes an innermost second inner conductor layer. The second conductor layer is coated outside the third insulating layer. Along the direction towards the third end, the at least one second conductor layer is respectively provided with second plugging holes, and the second plugging holes of the at least one second conductor layer are distributed in sequence along the axis. Among them, the second plugging holes of the at least one second conductor layer are communicated in sequence, and the first plugging hole is communicated with the second plugging hole of the second inner conductor layer. Each fourth insulating layer is disposed between two adjacent second conductor layers corresponding to it.

[0019] In one or more of the above optional embodiments, along the direction towards the third end, the third insulating layer protrudes from the central conductor layer.

[0020] In one or more of the above optional embodiments, along the direction towards the third end, each fourth insulating layer protrudes from the second conductor layer of its inner layer.

[0021] In one or more of the above optional embodiments, the female plug assembly further includes a third adapter and a third wire. One end of the third adapter is connected to the third wire, and the other end of the third adapter is connected to one end of the central conductor layer facing the fourth end.

[0022] The female plug assembly further includes a fourth adapter and a fourth wire. One end of the fourth adapter is connected to the fourth wire, and the other end of the fourth adapter is connected to one end of the second conductor layer facing the fourth end.

[0023] In one or more of the above optional embodiments, the female plug assembly further includes a capsule assembly. The capsule assembly is disposed on a side of the central conductor layer facing the fourth end. The interior of the capsule assembly is in communication with the first insertion hole, and / or the interior of the capsule assembly is in communication with the second insertion holes of at least one of the second conductor layers.

[0024] In one or more of the above optional embodiments, the capsule assembly includes a first capsule. The first capsule is wrapped around the third adapter, and the first insertion hole is in communication with the interior of the first capsule.

[0025] In one or more of the above optional embodiments, the capsule assembly includes at least one second capsule. The second capsule is wrapped around the fourth adapter, and the second insertion hole is in communication with the interior of the second capsule.

[0026] According to a third aspect of the present application, there is provided a fishing cable connector, including the male plug assembly described above; and / or the female plug assembly described above.

[0027] According to a fourth aspect of the present application, there is provided an oil production device, including the male plug assembly described above; and / or the female plug assembly described above.

[0028] In the male plug assembly involved in the present application, the first insertion portion of the central conductive column and the second insertion portions of the respective first conductor layers are coaxially arranged. When mating with the corresponding female plug assembly, the alignment is simple, and the direct docking of the male plug assembly and the female plug assembly can be smoothly achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, the drawings in the figures do not constitute a scale limitation.

[0030] Figure 1 It is a sectional view of a fishing cable connector provided in one embodiment of the present application;

[0031] Figure 2 A sectional view of a male plug assembly provided in one embodiment of the present application;

[0032] Figure 3 is Figure 2 a partially enlarged view of the male plug assembly shown;

[0033] Figure 4 Another sectional view of a male plug assembly provided in one embodiment of the present application;

[0034] Figure 5 A sectional view of a female plug assembly provided in one embodiment of the present application;

[0035] Figure 6 Another sectional view of a female plug assembly provided in one embodiment of the present application;

[0036] Figure 7 is Figure 6 a partially enlarged view of the capsule assembly of the female plug assembly covering the third adapter;

[0037] Figure 8 is Figure 6 a partially enlarged view of the capsule assembly of the female plug assembly covering the fourth adapter;

[0038] Reference numerals:

[0039] 01, male plug assembly; 01a, first end; 01b, second end; 1, central conductive column; 101, first insertion part; 2, first insulating layer; 201, first isolation part; 202, first end part; 2021, first stepped surface; 2022, first outer peripheral surface; 2023, first inclined surface; 203, first extension part; 231, first sealing groove; 3, first conductor layer; 301, first inner conductor layer; 302, first outer conductor layer; 31, second insertion part; 4, second insulating layer; 41, second isolation part; 42, second end part; 421, second stepped surface; 422, second outer peripheral surface; 423, second inclined surface; 43, second extension part; 431, second sealing groove; 401, first outer insulating layer; 5, first adapter; 6, first wire; 7, second adapter; 8, second wire; 9, second transfer insulating layer; 10, support layer; 11, sleeve; 12, limiting cylinder; 13, locking pin; 14, elastic member; 15, attracting member;

[0040] 02. Female plug assembly; 02a. Third terminal; 02b. Fourth terminal; 16. Central conductor layer; 16a. First insertion hole; 17. Third insulating layer; 17a. First connection hole; 18. Second conductor layer; 1801. Second inner conductor layer; 18a. Second insertion hole; 18b. Overcurrent channel; 19. Fourth insulating layer; 19a. Second connection hole; 20. Third adapter; 20a. First liquid passage hole; 21. Third wire; 22. Fourth adapter; 22a. Second liquid passage hole; 23. Fourth wire; 24. Capsule assembly; 241. First capsule; 242. Second capsule; 25. Third adapter insulating layer; 25a. Third sealing groove; 26. First adapter sleeve; 26a. First liquid guiding hole; 28. Fourth adapter insulating layer; 28a. Fourth sealing groove; 29. Second adapter sleeve; 29a. Second liquid guiding hole. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way restricts the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0042] For technologies, methods, and devices known to those of ordinary skill in the relevant art, they may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification.

[0043] In the description of the present application, it should be noted that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are usually based on the orientation or positional relationships shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary explanations, these orientation words do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus cannot be understood as limiting the protection scope of the present application; the orientation words "inner, outer" refer to the inside and outside relative to the contours of the respective components.

[0044] In the description of the present application, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without additional statements, the above words have no special meanings, and thus cannot be understood as limiting the protection scope of the present application.

[0045] In different embodiments of the present application described below, the technical features involved can be combined with each other as long as they do not conflict with each other.

[0046] Figure 1 A sectional view of a fishing cable connector provided in one embodiment of the present application is applied to a vertical well or a deviated well. For ease of description, hereinafter, an example in which the fishing cable connector is applied to a vertical well will be given.

[0047] Please refer to Figure 1 , the fishing cable connector includes a male plug assembly 01 and / or a female plug assembly 02. Among them, the male plug assembly 01 is configured to be electrically connected to a power supply, and the female plug assembly 02 is configured to be docked with a tubing string and a submersible pump unit.

[0048] During the process of lowering the submersible pump unit, the lead-in cable is docked and electrically conducted with the female plug assembly 02, and then one end of the tubing string is embedded in the female plug assembly 02. After the submersible pump unit, the female plug assembly 02, and the tubing string are all lowered into the vertical well, the male plug assembly 01 is extended from the tubing string on the ground part to be inserted and mated with the female plug assembly 02 to achieve electrical conduction between the submersible pump unit and the power supply.

[0049] When the submersible pump unit is in an operating state, the oil pumped out by it can be transported to the ground through the tubing string.

[0050] As Figures 2 to 4 shown, a male plug assembly 01 provided in one embodiment of the present application includes a first end 01a and a second end 01b that are oppositely arranged along the axis. Among them, the first end 01a is used for plugging with the female plug assembly 02, and the second end 01b is used for electrically connecting with the power supply.

[0051] The male plug assembly 01 includes a central conductive column 1, a first insulating layer 2, at least one first conductor layer 3, and at least one second insulating layer 4. Along the direction towards the first end 01a, one end of the central conductive column 1 is provided with a first plugging portion 101. The first insulating layer 2 is coated outside the central conductive column 1, and along the direction towards the first end 01a, the first plugging portion 101 protrudes from the first insulating layer 2. At least one first conductor layer 3 is sleeved in sequence, and at least one first conductor layer 3 includes an innermost first inner conductor layer 301, and the first inner conductor layer 301 is coated outside the first insulating layer 2. Along the direction towards the first end 01a, at least one first conductor layer 3 is respectively provided with a second plugging portion 31, and the second plugging portions 31 of at least one first conductor layer 3 are distributed in sequence along the axis. Each second insulating layer 4 is coated outside a corresponding first conductor layer 3. Among them, the above-mentioned axis refers to the direction from the first end 01a towards the second end 01b.

[0052] In some embodiments, the central conductive post 1 has conductivity and is generally in an elongated columnar structure. When the male plug assembly 01 is plugged into the female plug assembly 02, the first plugging portion 101 is used to at least partially contact the female plug assembly to form electrical conduction. One end of the central conductive post 1 facing the second end 01b is electrically connected to a power supply.

[0053] As Figure 2 shown, in some embodiments, along the radial direction of the male plug assembly 01 from the inside to the outside, the central conductive post 1, the first insulating layer 2, and the first inner conductor layer 301 are arranged in sequence. The first insulating layer 2 is generally in a cylindrical shape and is disposed between the central conductive post 1 and the first inner conductor layer 301 to insulate the central conductive post 1 and the first inner conductor layer 301. Along the direction towards the first end 01a, the first plugging portion 101 protrudes from the first insulating layer 2 so that the first plugging portion 101 can contact the female plug assembly.

[0054] As Figure 2 shown, in some embodiments, at least one first conductor layer 3 is respectively in a hollow cylindrical shape, and along the circumferential direction of the male plug assembly 01 from the inside to the outside, the inner diameters of the at least one first conductor layer 3 increase in sequence so that the at least one first conductor layer 3 can be sleeved in sequence, and the at least one first conductor layer 3 is coaxially arranged with the central conductive post 1.

[0055] It should be noted that the first inner conductor layer 301 being in the innermost layer is in terms of the layout position of each first conductor layer 3, that is, the first inner conductor layer 301 is in the innermost layer of the at least one first conductor layer 3, rather than referring to the first inner conductor layer 301 being in the innermost layer of the entire male plug assembly 01.

[0056] Please refer to Figure 2 in conjunction with Figure 4 , in some embodiments, each first conductor layer 3 has conductivity. When the male plug assembly 01 is plugged and fixed to the female plug assembly 02, the second plugging portion 31 is used to at least partially contact the female plug assembly 02 to conduct electricity. One end of each first conductor layer 3 facing the second end 01b is electrically connected to a power supply. Among them, the second plugging portions 31 of the at least one first conductor layer 3 are distributed in sequence along the axial direction of the male plug assembly 01, that is, along the direction towards the first end 01a, the second plugging portion 31 of the first conductor layer 3 relatively located in the inner layer protrudes from the second plugging portion 31 of the first conductor layer 3 relatively located in the outer layer.

[0057] In some embodiments, a gap is provided between two adjacent first conductor layers 3, and each second insulating layer 4 is disposed within the gap between two corresponding adjacent first conductor layers 3, so that the two adjacent first conductor layers 3 are insulated by the second insulating layer 4. Wherein, along the direction towards the first end 01a, the first conductor layer 3 located relatively inside the second insulating layer 4 has its second insertion portion 31 protruding from the second insulating layer 4, so that the second insertion portion 31 of each first conductor layer 3 can contact the female plug assembly.

[0058] In this embodiment, an example is given with the number of first conductor layers 3 being 2. At least one first conductor layer 3 includes a first inner conductor layer 301 and a first outer conductor layer 302, and the first inner conductor layer 301 and the first outer conductor layer 302 respectively include second insertion portions 31. Wherein, the first outer conductor layer 302 is sleeved outside the first inner conductor layer 301. A second insulating layer 4 is provided between the first inner conductor layer 301 and the first outer conductor layer 302, the second insulating layer 4 covers the outside of the first inner conductor layer 301, and the first outer conductor layer 302 covers the outside of the second insulating layer 4, so that the first inner conductor layer 301 and the first outer conductor layer 302 are insulated from each other. Along the direction towards the first end 01a, the length of the first inner conductor layer 301 is respectively greater than the length of the second insulating layer 4 and the length of the first outer conductor layer 302, so that the second insertion portions 31 of the first inner conductor layer 301 and the first outer conductor layer 302 are distributed axially in sequence, and the second insertion portion 31 of the first inner conductor layer 301 protrudes from the second insulating layer 4, so that the second insertion portion 31 of the first inner conductor layer 301 and the second insertion portion 31 of the first outer conductor layer 302 can both contact the female plug assembly 02. It can be understood that in some other embodiments, the number of first conductor layers 3 can be set according to actual needs, such as being set to one or three, which is not limited herein. It can be understood that in some other embodiments, when the number of first conductor layers 3 is one, one first conductor layer 3 is both the first inner conductor layer 301 and the first outer conductor layer 302.

[0059] For the male plug assembly 01 involved in the present application, the first insertion portion 101 of the central conductive column 1 and the second insertion portions 31 of the respective first conductor layers 3 are coaxially arranged. When mating with the corresponding female plug assembly 02, the alignment is simple, and the direct docking of the male plug assembly 01 and the female plug assembly can be smoothly achieved.

[0060] In some embodiments, the first insulating layer 2 and the second insulating layer 4 are formed by injection molding in sequence. For example, the central conductive column 1 and at least one first conductor layer 3 are first processed, and then the first insulating layer 2 is filled between the central conductive column 1 and the first conductor layer 3, and the second insulating layer 4 is filled between two adjacent first conductor layers 3. The processing method of the male plug assembly 01 is not limited herein.

[0061] In order to reduce the situation where the central conductive column 1 contacts and shorts with the first inner conductor layer 301, in some embodiments, the first insulating layer 2 protrudes from the first inner conductor layer 301 in the direction toward the first end 01a. In the direction toward the first end 01a, the first insulating layer 2 protrudes from the second plug-in portion 31 of the first inner conductor layer 301. In this way, the first plug-in portion 101 of the central conductive column 1 and the second plug-in portion 31 of the first inner conductor layer 301 are separated by the portion of the first insulating layer 2 protruding from the second plug-in portion 31. Compared with the presence of a gap between the first plug-in portion 101 and the second plug-in portion 31, the situation where the first plug-in portion 101 and the second plug-in portion 31 are short-circuited due to the adhesion of liquid dielectric (such as water in well fluid) to the gap between the first plug-in portion 101 and the second plug-in portion 31 is avoided.

[0062] To facilitate the insertion of the male plug assembly 01 and the female plug assembly 02, in some embodiments, the first insulating layer 2 includes a first isolation portion 201 and a first end portion 202. The first isolation portion 201 is disposed between the central conductive column 1 and the first inner conductor layer 301, and the first end portion 202 is connected to one end of the first isolation portion 201 facing the first end 01a. A first step surface 2021 is provided at one end of the first end portion 202 facing the first isolation portion 201, and the first step surface 2021 abuts against the first inner conductor layer 301. A first inclined surface 2023 is provided at one end of the first end portion 202 away from the first isolation portion 201, and the first inclined surface 2023 is used for guidance during insertion.

[0063] In some embodiments, along the direction toward the first end 01a, the first stepped surface 2021 is connected to the first inclined surface 2023 through the first outer peripheral surface 2022. From the inside to the outside along the radial direction of the male plug assembly 01, the first outer peripheral surface 2022 and the outer peripheral surface of the second plug-in portion 31 of the first inner conductor layer 301 facing away from the central conductive column 1 are flush. Therefore, along the plug-in direction of the male plug assembly 01, the first end portion 202 contacts the female plug assembly 02 before the second plug-in portion 31 of the first inner conductor layer 301, reducing the direct wear of the second plug-in portion 31 of the first inner conductor layer 301 and the female plug assembly 02 when plugging, and extending the service life of the first inner conductor layer 301.

[0064] In some embodiments, the first insulating layer 2 includes a first extension portion 203, and the first extension portion 203 is connected to one end of the first end portion 202 facing the first end 01a. The outer peripheral surface of the first extension portion 203 is provided with a first sealing groove 231, and a sealing ring (not marked in the figure) is provided in the first sealing groove 231. When the male plug assembly 01 and the female plug assembly 02 are plugged in, the sealing ring is used to abut against the female plug assembly 02 to form a seal, so as to prevent the well fluid between the central conductive column 1 and the first conductor layer 3 from being connected and causing insulation failure.

[0065] It should be noted that the foregoing description that the first insertion portion 101 protrudes from the first insulating layer 2 in the direction toward the first end 01a specifically refers to: when the first insulating layer 2 includes the first isolation portion 201 and the first end portion 202 but does not include the first extension portion 203, the first insertion portion 101 protrudes from the first end portion 202 in the direction toward the first end 01a. When the first insulating layer 2 includes the first isolation portion 201, the first end portion 202, and the first extension portion 203, the first insertion portion 101 protrudes from the first extension portion 203 in the direction toward the first end 01a.

[0066] In order to reduce the situation where two adjacent first inner conductor layers 301 come into contact and are short-circuited, in some embodiments, each second insulating layer 4 protrudes from the first conductor layer 3 of its outer layer in the direction toward the first end 01a. Specifically, in the direction toward the first end 01a, a second insulating layer 4 protrudes from the second insertion portion 31 of the first conductor layer 3 of its outer layer and does not protrude from the second insertion portion 31 of the first conductor layer 3 of its inner layer. With such a setting, the second insertion portions 31 of two adjacent first conductor layers 3 are separated by the portion of the first insulating layer 2 that protrudes from the second insertion portion 31. Compared with the case where there is a gap between two adjacent second insertion portions 31, it avoids the situation where two adjacent second insertion portions 31 are short-circuited due to the adhesion of a liquid dielectric (such as the water contained in well fluid) between the two adjacent second insertion portions 31 and the gap between them.

[0067] To facilitate the insertion of the male plug assembly 01 and the female plug assembly 02 into each other, in some embodiments, each second insulating layer 4 includes a second isolation portion 41 and a second end portion 42. The second isolation portion 41 is disposed between two corresponding adjacent first conductor layers 3, and the second end portion 42 is connected to one end of the second isolation portion 41 facing the first end 01a. A second stepped surface 421 is provided at one end of the second end portion 42 facing the second isolation portion 41, and the second stepped surface 421 abuts against the first conductor layer 3 of the outer layer. A second inclined surface 423 is provided at the end of the second end portion 42 facing away from the second isolation portion 41, and the second inclined surface 423 is used for guiding during insertion.

[0068] Further, in the direction toward the first end 01a, the second stepped surface 421 is connected to the second inclined surface 423 through a second outer peripheral surface 422. Along the radial direction of the male plug assembly 01 from the inside to the outside, the second outer peripheral surface 422 and the outer peripheral surface of the second insertion portion 31 of the first conductor layer 3 facing away from the central conductive column 1 are flush with each other. Thus, along the insertion direction of the male plug assembly 01, the second end portion 42 contacts the female plug assembly 02 before the second insertion portion 31 of the first conductor layer 3, thereby ensuring the strength of the first conductor layer 3.

[0069] In some embodiments, the second insulating layer 4 includes a second extension portion 43. The second extension portion 43 is connected to one end of the second end portion 42 facing the first end 01a. The second extension portion 43 is used to cooperate with the second inclined surface 423 for guiding during insertion. A second sealing groove 431 is provided on the outer peripheral surface of the second extension portion 43, and a sealing ring (not shown in the figure) is provided in the second sealing groove 431. When the male plug assembly 01 is inserted into the female plug assembly, the sealing ring is used to abut against the female plug assembly to form a seal, preventing the well fluid from communicating between two adjacent first conductor layers 3 and causing insulation failure.

[0070] To provide a reliable electrical connection between the central conductive post 1 and the power supply, in some embodiments, the male plug assembly 01 includes a first adapter 5 and a first wire 6. One end of the central conductive post 1 facing the second end 01b is connected to one end of the first adapter 5, and the other end of the first adapter 5 is connected to the first wire 6, and the first wire 6 is electrically connected to the power supply. With this technical solution, a more firm and stable connection can be provided through the first adapter 5, improving the reliability of electrical contact and avoiding problems such as current interruption or poor contact.

[0071] To provide a reliable electrical connection between the first conductor layer 3 and the power supply, in some embodiments, the male plug assembly 01 includes a second adapter 7 and a second wire 8. One end of the first conductor layer 3 facing the second end 01b is connected to one end of the second adapter 7, and the other end of the second adapter 7 is connected to the second wire 8, and the second wire 8 is electrically connected to the power supply. With this technical solution, a more firm and stable connection can be provided through the second adapter 7, improving the reliability of electrical contact and avoiding problems such as current interruption or poor contact.

[0072] In some embodiments, a first adapter insulating layer (not shown in the figure) is provided between the first adapter 5 and the adjacent second adapter 7 to prevent conduction between the first adapter 5 and the second adapter 7. It can be understood that in some other embodiments, the first adapter insulating layer can be one end of the first insulating layer 2 facing the second end 01b.

[0073] In some embodiments, a second adapter insulating layer 9 is provided between two adjacent second adapters 7 to prevent conduction between two adjacent second adapters 7. It can be understood that in some other embodiments, the second adapter insulating layer 9 can be one end of the second insulating layer 4 facing the second end 01b.

[0074] In some embodiments, at least one first conductor layer 3 includes an outermost first outer conductor layer 302, and at least one second insulating layer 4 includes an outermost first outer insulating layer 401, and the first outer insulating layer 401 is coated on the outside of the first outer conductor layer 302. The male plug assembly 01 also includes a supporting layer 10 and a sleeve 11. The first outer insulating layer 401 is coated on the outside of the first outer conductor layer 302, the supporting layer 10 is coated on the outside of the first outer insulating layer 401, one end of the sleeve 11 is sleeved on the outside of the supporting layer 10, and the first adapter 5 and the second adapter 7 are arranged in the sleeve 11.

[0075] In the male plug assembly 01 involved in the present application, the sleeve 11 can be used as a protective structure and a supporting structure to exclude well fluid from the sleeve 11 to avoid the situation where the liquid dielectric (such as water in the well fluid) conducts the first adapter 5 and the plurality of second adapters 7 and causes a short circuit. Wherein, when the support layer 10 is made of a metal material, the first outer insulating layer 401 can play an electrical insulating role to prevent the support layer 10 from being directly in contact with the first outer conductor layer 302 and becoming charged.

[0076] In some embodiments, the male plug assembly 01 includes a limiting cylinder 12, which is connected to the end of the sleeve 11 away from the support layer 10, and the limiting cylinder 12 is used to limit the position when plugging. Specifically, the end of the sleeve 11 away from the support layer 10 is provided with a convex portion (not marked in the figure), and the limiting cylinder 12 is passed through the sleeve 11 and abuts against the convex portion. The end surface of the limiting cylinder 12 facing the first end 01a is provided with an abutting inclined surface (not marked in the figure), and the abutting inclined surface is used to abut and limit the position when plugging with the female plug assembly.

[0077] In some embodiments, the male plug assembly 01 further includes a locking pin 13. The locking pin 13 is movably disposed on the limiting cylinder 12, and the locking pin 13 can move radially along the limiting cylinder 12, and the locking pin 13 is used to move to partially extend out of the limiting cylinder 12 to lock with the female plug assembly 02.

[0078] In some embodiments, the limiting cylinder 12 includes a locking hole (not marked in the figure). The locking hole extends from the outer wall of the limiting cylinder 12 toward the inner wall of the limiting cylinder 12, and the locking pin 13 is movably disposed in the locking hole.

[0079] In some embodiments, the male plug assembly 01 further includes an elastic member 14. One end of the elastic member 14 abuts against the locking pin 13, and the elastic member 14 can drive the locking pin 13 to move toward the inner wall of the limiting cylinder 12 so that the locking pin 13 is accommodated in the locking hole. The elastic member 14 is a spring. It is understandable that in some other embodiments, the elastic member 14 can also be set to other structures, such as a disc spring, a spring, etc., which are not limited here.

[0080] In some embodiments, the male plug assembly 01 further includes an attracting member 15. The attracting member 15 is disposed on the locking pin 13. The attracting member 15 can drive the locking pin 13 to move towards the outer wall of the limiting cylinder 12, so that a part of the locking pin 13 extends out of the locking hole. Wherein, the attracting member 15 is electrically connected to the first wire 6 and / or the second wire 8. When the male plug assembly 01 is inserted into the female plug assembly, the first wire 6 and the second wire 8 are energized to supply power to the attracting member 15, so that the attracting member 15 drives the locking pin 13 to move until a part of it extends out of the locking hole, so that the locking pin 13 is connected and locked with the female plug assembly. Wherein, the attracting member 15 is an electromagnet. It can be understood that in some other embodiments, the attracting member 15 can also be set to other structures, such as a motor, etc., which is not limited herein.

[0081] As Figures 5 to 8 shown, a female plug assembly 02 provided in an embodiment of the present application includes a third end 02a and a fourth end 02b that are oppositely arranged along the axis. Wherein, the third end 02a is used for inserting into the male plug assembly 01, and the fourth end 02b is used for docking with the oil pipe and the submersible pump unit.

[0082] In some embodiments, the female plug assembly 02 includes a central conductor layer 16, a third insulating layer 17, at least one second conductor layer 18, and at least one fourth insulating layer 19. The central conductor layer 16 is provided with a first insertion hole 16a. The third insulating layer 17 is coated outside the central conductor layer 16. At least one second conductor layer 18 is sleeved in sequence. At least one second conductor layer 18 includes an innermost second inner conductor layer 1801. The second inner conductor layer 1801 is coated outside the third insulating layer 17. Along the direction towards the third end 02a, at least one second conductor layer 18 is respectively provided with second insertion holes 18a. The second insertion holes 18a of at least one second conductor layer 18 are distributed in sequence along the axis. Wherein, the second insertion holes 18a of at least one second conductor layer 18 are communicated in sequence, and the first insertion hole 16a is communicated with the second insertion hole 18a of the second inner conductor layer 1801. Each fourth insulating layer 19 is coated outside a corresponding second conductor layer 18.

[0083] In some embodiments, the first insertion hole 16a penetrates through the opposite ends of the central conductor layer 16 along the axis, so that the central conductor layer 16 is generally in the shape of a through hollow cylinder. Wherein, the central conductor layer 16 has conductivity. The first insertion hole 16a is used to accommodate the first insertion part 101 when the male plug assembly 01 is inserted and fixed to the female plug assembly 02, and the inner peripheral wall of the first insertion hole 16a contacts the first insertion part 101, so that the central conductor layer 16 conducts electricity with the central conductive column 1.

[0084] In some embodiments, along the radial direction of the female plug assembly 02 from the inside to the outside, the central conductor layer 16, the third insulating layer 17, and the second inner conductor layer 1801 are sequentially arranged. The third insulating layer 17 is generally cylindrical, and the third insulating layer 17 is disposed between the central conductor layer 16 and the second inner conductor layer 1801 to insulate the central conductor layer 16 and the second inner conductor layer 1801 from each other. Along the direction towards the third end 02a, the third insulating layer 17 protrudes from the central conductor layer 16 so that when the female plug assembly 02 is inserted into the male plug assembly 01, the third insulating layer 17 can cover the outside of the first insulating layer 2, thereby preventing the well fluid from communicating between the central conductor layer 16 and the second conductor layer 18 and causing insulation failure.

[0085] In some embodiments, along the radial direction of the female plug assembly 02 from the inside to the outside, the inner diameters of at least one second conductor layer 18 increase in sequence so that at least one second conductor layer 18 is sleeved in sequence, and at least one second conductor layer 18 is coaxially arranged with the central conductor layer 16.

[0086] It should be noted that the fact that the second inner conductor layer 1801 is in the innermost layer is with respect to the layout position of each second conductor layer 18, that is, the second inner conductor layer 1801 is in the innermost layer of at least one second conductor layer 18, rather than referring to the second inner conductor layer 1801 being in the innermost layer of the entire female plug assembly 02.

[0087] In some embodiments, along the direction towards the third end 02a, at least one second conductor layer 18 is respectively provided with a second insertion hole 18a, and the second insertion hole 18a penetrates through the opposite ends of the second conductor layer 18 along the axial direction so that the second conductor layer 18 is generally in a hollow cylindrical shape. Among them, each second conductor layer 18 has conductivity. When the male plug assembly 01 is inserted and fixed to the female plug assembly 02, the second insertion hole 18a of each second conductor layer 18 is used to accommodate the corresponding second insertion portion 31 of a first conductor layer 3, and the inner peripheral wall of the second insertion hole 18a is in partial contact with the second insertion portion 31 so that each second conductor layer 18 conducts electricity with the corresponding first conductor layer 3.

[0088] In some embodiments, there is a gap between two adjacent second conductor layers 18, and each fourth insulating layer 19 is disposed in the gap between the corresponding two adjacent second conductor layers 18 to insulate the two adjacent second conductor layers 18 from each other. Among them, along the direction towards the third end 02a, the fourth insulating layer 19 protrudes from the relatively inner second conductor layer 18 so that when the female plug assembly 02 is inserted into the male plug assembly 01, each fourth insulating layer 19 can cover the corresponding second insertion portion 31 and / or the corresponding second insulating layer 4, and a seal is formed by the abutment between the fourth insulating layer 19 and the second insulating layer 4, thereby preventing the well fluid from communicating between two adjacent second conductor layers 18 and causing insulation failure.

[0089] In some embodiments, along the direction towards the third end 02a, the second insertion holes 18a of at least one second conductor layer 18 are sequentially communicated, and the first insertion hole 16a is communicated with the second insertion hole 18a of the second inner conductor layer 1801.

[0090] In some embodiments, the third insulating layer 17 is provided with a first connection hole 17a. The first insertion hole 16a is communicated with the second insertion hole 18a of the second inner conductor layer 1801 through the first connection hole 17a. The first connection hole 17a is used to receive the first insulating layer 2. When the female plug assembly 02 is inserted into the male plug assembly 01, the first extension portion 203 of the first insulating layer 2 is inserted into the first connection hole 17a, and the outer peripheral wall of the first extension portion 203 abuts against the hole wall of the first connection hole 17a, thereby preventing the well fluid from communicating between the central conductor layer 16 and the second conductor layer 18.

[0091] In some embodiments, a sealing ring is provided in the first sealing groove 231 of the first extension portion 203. The sealing ring is arranged between the first insulating layer 2 and the third insulating layer 17 to ensure the sealing between the central conductor layer 16 and the second conductor layer 18.

[0092] In some embodiments, each fourth insulating layer 19 is respectively provided with a second connection hole 19a. The second insertion holes 18a of two adjacent second conductor layers 18 are communicated through a corresponding second connection hole 19a. Each second connection hole 19a is used to receive a corresponding second insulating layer 4. When the female plug assembly 02 is inserted into the male plug assembly 01, the second extension portion 43 of each second insulating layer 4 is inserted into a corresponding second connection hole 19a, and the outer peripheral wall of the second extension portion 43 abuts against the hole wall of the second connection hole 19a, thereby preventing the well fluid from communicating between two adjacent second conductor layers 18.

[0093] In some embodiments, a sealing ring is provided in the second sealing groove 431 of each second extension portion 43. The sealing ring is arranged between a second insulating layer 4 and a corresponding fourth insulating layer 19 to ensure the sealing between two adjacent second conductor layers 18.

[0094] For the female plug assembly 02 involved in the present application, the first insertion hole 16a of the central conductor layer 16 and the second connection holes 19a of the respective second conductor layers 18 are coaxially arranged. When being inserted into the mating male plug assembly 01, the docking is simple, and the direct docking of the male plug assembly 01 and the female plug assembly 02 can be smoothly achieved.

[0095] In some embodiments, the central conductor layer 16 and at least one second conductor layer 18 are fixed into an integral structure by injection molding. The third insulating layer 17 is an interlayer structure injection molded between the central conductor layer 16 and the second inner conductor layer 1801. Each fourth insulating layer 19 is an interlayer structure injection molded between two adjacent second conductor layers 18.

[0096] In some embodiments, the third insulating layer 17 and the fourth insulating layer 19 are sequentially formed by injection molding. For example, the central conductor layer 16 and at least one second conductor layer 18 are first processed, and then the third insulating layer 17 is filled between the central conductor layer 16 and the second conductor layer 18, and the fourth insulating layer 19 is filled between two adjacent second conductor layers 18. The processing method of the female plug assembly 02 is not limited herein.

[0097] To reduce the situation where the central conductor layer 16 is in contact with the second inner conductor layer 1801 and causes a short circuit, in some embodiments, along the direction towards the third end 02a, the third insulating layer 17 protrudes from the central conductor layer 16.

[0098] To reduce the situation where two adjacent second conductor layers 18 are in contact and cause a short circuit, in some embodiments, along the direction towards the third end 02a, each fourth insulating layer 19 protrudes from the inner second conductor layer 18.

[0099] To provide a reliable electrical connection between the central conductor layer 16 and the submersible pump unit, in some embodiments, the female plug assembly 02 includes a third adapter 20 and a third wire 21. One end of the central conductor layer 16 facing the fourth end 02b is connected to one end of the third adapter 20, the other end of the third adapter 20 is connected to the third wire 21, and the third wire 21 is electrically connected to the submersible pump unit. Among them, one end of the third adapter 20 facing the third end 02a is inserted into the first insertion hole 16a of the central conductor layer 16, and the third adapter 20 contacts the central conductor layer 16 to form electrical conduction.

[0100] In some embodiments, the third adapter 20 is coated with a third adapter insulating layer 25 to prevent the third adapter 20 from contacting the well fluid outside it. Along the direction towards the third end 02a, the third adapter 20 protrudes from the third adapter insulating layer 25, and the part of the third adapter 20 protruding from the third adapter insulating layer 25 is inserted into the first insertion hole 16a. One end of the third adapter insulating layer 25 facing the third end 02a is inserted into the first connection hole 17a of the third insulating layer 17, and the third adapter insulating layer 25 is disposed at one end of the first connection hole 17a facing the fourth end 02b, and the outer wall of the third adapter insulating layer 25 abuts against the hole wall of the first connection hole 17a, thereby isolating the third adapter 20 from the well fluid outside.

[0101] In some embodiments, a third sealing groove 25a is provided outside the third transfer insulating layer 25, and a sealing ring (not shown in the figure) is provided in the third sealing groove 25a. The sealing ring is disposed between the third transfer insulating layer 25 and the third insulating layer 17 to improve the sealing performance between the third transfer insulating layer 25 and the third insulating layer 17.

[0102] In some embodiments, the female plug assembly 02 further includes a first transfer sleeve 26. Two ends of the first transfer sleeve 26 are respectively connected to the third transfer member 20 and the third wire 21. A first transfer hole (not shown in the figure) is provided inside the first transfer sleeve 26. One end of the third transfer member 20 and one end of the third wire 21 are respectively inserted into the first transfer hole to ensure the connection stability between the third transfer member 20 and the third wire 21.

[0103] As Figure 6 shown, to provide a reliable electrical connection between the second conductor layer 18 and the submersible oil pump unit, in some embodiments, the female plug assembly 02 includes a fourth transfer member 22 and a fourth wire 23. One end of the second conductor layer 18 facing the fourth end 02b is connected to one end of the fourth transfer member 22. The other end of the fourth transfer member 22 is connected to the fourth wire 23, and the fourth wire 23 is electrically connected to the submersible oil pump unit. Wherein, one end of the fourth transfer member 22 facing the third end 02a is inserted into the second insertion hole 18a of the second conductor layer 18, and the fourth transfer member 22 contacts the second conductor layer 18 to form conduction.

[0104] In some embodiments, the fourth transfer member 22 is coated with a fourth transfer insulating layer 28 to prevent the fourth transfer member 22 from contacting the well fluid outside it. Along the direction towards the third end 02a, the fourth transfer member 22 protrudes from the fourth transfer insulating layer 28, and the part of the fourth transfer member 22 protruding from the fourth transfer insulating layer 28 is inserted into the second insertion hole 18a. One end of the fourth transfer insulating layer 28 facing the third end 02a is inserted into the second connection hole 19a of the fourth insulating layer 19, and the fourth transfer insulating layer 28 is disposed at one end of the second connection hole 19a facing the fourth end 02b. The outer wall of the fourth transfer insulating layer 28 abuts against the hole wall of the second connection hole 19a, thereby isolating the fourth transfer member 22 from the well fluid outside.

[0105] In some embodiments, a fourth sealing groove 28a is provided outside the fourth transfer insulating layer 28, and a sealing ring (not shown in the figure) is provided in the fourth sealing groove 28a. The sealing ring is disposed between the fourth transfer insulating layer 28 and the fourth insulating layer 19 to improve the sealing performance between the fourth transfer insulating layer 28 and the fourth insulating layer 19.

[0106] In some embodiments, the female plug assembly further includes a second adapter sleeve 29. The two ends of the second adapter sleeve 29 are respectively connected to a fourth adapter 22 and a fourth wire 23. A second adapter hole (not labeled in the figure) is provided inside the second adapter sleeve 29, and one end of the fourth adapter 22 and one end of the fourth wire 23 are respectively inserted into the second adapter hole to ensure the connection stability between the fourth adapter 22 and the fourth wire 23.

[0107] To facilitate storing the excess well fluid after the male plug assembly 01 is inserted into the female plug assembly 02, in some embodiments, the female plug assembly 02 further includes a capsule assembly 24. The capsule assembly 24 is disposed on one side of the central conductor layer 16 facing the fourth end 02b. The interior of the capsule assembly 24 is in communication with the first insertion hole 16a.

[0108] In some embodiments, the capsule assembly 24 includes a first capsule 241. The first insertion hole 16a is in communication with the interior of the first capsule 241, and the first capsule 241 can accommodate the well fluid discharged from the first insertion hole 16a. The first capsule 241 is wrapped around the outside of the first adapter sleeve 26, and one end of the first capsule 241 at least partially wraps around the outside of the third adapter insulating layer 25, and the other end of the first capsule 241 at least partially wraps around the outside of the third wire 21. Wherein, a first liquid passage hole 20a is axially provided inside the third adapter 20, a first liquid guiding hole 26a is radially provided inside the first adapter sleeve 26, and the two ends of the first liquid passage hole 20a are respectively in communication with the first insertion hole 16a and the first liquid guiding hole 26a. The first liquid guiding hole 26a is also in communication with the interior of the first capsule 241, so that the well fluid in the first insertion hole 16a can sequentially pass through the first liquid passage hole 20a and the first liquid guiding hole 26a and enter the interior of the first capsule 241.

[0109] It can be understood that in some other embodiments, the first adapter sleeve 26 can be omitted, the third adapter 20 and the third wire 21 are directly connected, the first capsule 241 respectively wraps around the outside of the third adapter insulating layer 25 and the third wire 21, and the well fluid in the first insertion hole 16a enters the interior of the first capsule 241 through the first liquid passage hole 20a. At the same time, the first capsule 241 can also isolate the connection between the third adapter 20 and the third wire 21 from the outside well fluid.

[0110] It can be understood that in some other embodiments, the third adapter insulating layer 25 can also be omitted, one end of the first capsule 241 directly wraps around the outside of the third adapter 20, and the first capsule 241 can also isolate the third adapter 20 from the outside well fluid.

[0111] In some embodiments, the interior of the capsule assembly 24 is in communication with the second insertion holes 18a of at least one second conductor layer 18.

[0112] In some embodiments, the capsule assembly includes a second capsule 242. The second insertion hole 18a communicates with the interior of the second capsule 242, and the second capsule 242 can accommodate the well fluid discharged from the second insertion hole 18a. The second capsule 242 is wrapped around the second adapter sleeve 29. One end of the second capsule 242 is at least partially wrapped around the fourth adapter insulating layer 28, and the other end of the second capsule 242 is at least partially wrapped around the fourth wire 23. Wherein, a second liquid passing hole 22a is axially provided inside the fourth adapter 22, and a second liquid guiding hole 29a is radially provided inside the second adapter sleeve 29. The second liquid guiding hole 29a also communicates with the interior of the second capsule 242, so that the well fluid in the second insertion hole 18a can sequentially pass through the second liquid passing hole 22a and the second liquid guiding hole 29a and enter the interior of the second capsule 242.

[0113] It can be understood that in some other embodiments, the second adapter sleeve can be omitted, the fourth adapter and the fourth wire are directly connected, one end of the second capsule 242 is directly wrapped around the fourth adapter, and the second capsule 242 can also isolate the fourth adapter from the well fluid outside.

[0114] It can be understood that in some other embodiments, the fourth adapter insulating layer can also be omitted, one end of the second capsule 242 is directly wrapped around the fourth adapter, and the second capsule 242 can also isolate the fourth adapter from the well fluid outside.

[0115] In the embodiments of the present application, since the male plug assembly 01 and the female plug assembly 02 are docked underground and the female plug assembly 02 is first lowered into the well, there will be well fluid in the first insertion hole 16a and the second insertion hole 18a of the female plug assembly 02. When the first insertion part 101 of the male plug assembly 01 is inserted into the first insertion hole 16a of the female plug assembly 02, the well fluid in the first insertion hole 16a can be discharged from the first liquid passing hole 20a and the first liquid guiding hole 26a into the first capsule 241. When each second insertion part 31 is inserted into a corresponding second insertion hole 18a, the well fluid in the second insertion hole 18a can be discharged from the second liquid passing hole 22a and the second liquid guiding hole 29a into the second capsule 242, so as to reduce the force required to overcome the resistance of the well fluid during the docking of the two, thereby ensuring more reliable docking of the male and female connector assemblies. When the male plug assembly 01 is pulled out from the female plug assembly 02, due to the elasticity of the capsule, the well fluid stored last time can be pumped out, and the capsule assembly 24 can continue to store well fluid next time, without affecting the secondary docking of the male plug assembly 01 and the female plug assembly 02.

[0116] In an embodiment of the present application, when the male plug assembly 01 is docked with the female plug assembly 02 in place, the central conductive post 1 of the male plug assembly 01 contacts and conducts electricity with the central conductor layer 16 of the female plug assembly 02, and each first conductor layer 3 contacts and conducts electricity with a corresponding second conductor layer 18, so that the attracting member 15 of the male plug assembly 01 is energized, and the attracting member 15 pushes the locking pin 13 to partially protrude from the locking hole, so that one end of the locking pin 13 is inserted into the female plug assembly 02, thereby realizing stable connection between the male plug assembly 01 and the female plug assembly 02. Among them, the inner wall of the female plug assembly 02 is provided with a plugging hole (not shown in the figure) that cooperates with the locking pin 13. When the male plug assembly 01 is docked with the female plug assembly 02 in place, the plugging hole communicates with the locking hole, and one end of the locking pin 13 passes through the locking hole and is inserted into the plugging hole.

[0117] In an embodiment of the present application, when the male plug assembly 01 is docked with the female plug assembly 02 in place, the first end portion 202 of the first insulating layer 2 abuts against the third insulating layer 17 of the female plug assembly 02, and the second end portion 42 of each second insulating layer 4 abuts against a corresponding fourth insulating layer 19, thereby realizing docking and positioning of the male plug assembly 01 and the female plug assembly 02.

[0118] For the convenience of readers to understand the technical solution of the present application, the male plug assembly 01 and the female plug assembly 02 in specific forms will be described below.

[0119] The fishing cable connector is a three-phase connector. The number of the first conductor layers 3 of the male plug assembly 01 is two. The first conductor layer 3 on the inner side is the first inner conductor layer 301, and the first conductor layer 3 on the outer side is the first outer conductor layer 302. The first inner conductor layer 301 is connected to a second wire 8 through a second adapter 7, and the first outer conductor layer 302 is connected to a second wire 8 through a second adapter 7. The number of the second conductor layers 18 of the female plug assembly is two. The second conductor layer 18 on the inner side is the second inner conductor layer 1801, and the second conductor layer 18 on the outer side is the second outer conductor layer. The second inner conductor layer 1801 is connected to a fourth wire 23 through a fourth adapter 22, and the second outer conductor layer is connected to a fourth wire 23 through a fourth adapter 22.

[0120] In the fishing cable connection device of the present application, the three conductors of the male plug assembly of the connection device are integrated on the same axis and sealed by injection molding. No guiding is required during docking, reducing the risk of jamming during docking. Similarly, the three conductors of the female plug assembly of the connection device are integrated on the same axis and sealed by injection molding, so that it is convenient for the male plug to be inserted during docking to ensure that the docking is in place.

[0121] When the male and female plug components are docked, the sealing rings provided on the first plugging part of the male plug component respectively abut against the first insulating layer and the third insulating layer, and the sealing rings provided on each second plugging part of the male plug component respectively abut against the second insulating layer and the fourth insulating layer, so as to avoid the short-circuit situation caused by the intrusion of well fluid between two adjacent conductor layers. After the male and female plug components are docked in place, the attracting member is energized so that the attracting member drives the locking pin to move to partially protrude outside the locking hole, thereby realizing the connection and locking of the male plug component and the female plug component. This prevents the disconnection of the connection device due to other reasons during operation. Fundamentally, the reliability of the docking process is solved, and the situation of easy jamming during docking is avoided.

[0122] Originally, the well fluid was infiltrated in the first plugging hole and each second plugging hole of the female plug component, and was squeezed into their respective rubber capsules during the docking of the male and female plugs. The capsule component plays a buffering effect, reducing the docking force and further ensuring that the docking is in place. And when the male plug component is pulled out from the female plug component, since the rubber capsule has elasticity, the well fluid stored previously can be squeezed out, which does not affect the secondary docking of the male plug component and the female plug component.

[0123] In another embodiment of the present application, an oil production device is further provided, including the above-mentioned male plug component and / or female plug component. For the specific structures of the male plug component and the female plug component, they will not be elaborated here.

[0124] It should be noted that the description and drawings of the present application give preferred embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments do not serve as additional limitations to the content of the present application. The purpose of providing these embodiments is to make the understanding of the disclosed content of the present application more thorough and comprehensive. And, the above technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as within the scope described in the specification of the present application; further, for those of ordinary skill in the art, they can be improved or transformed according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present application.

Claims

1. A fishing cable connector, characterized in that, Includes a male plug assembly and a female plug assembly; The male plug assembly comprises a first end and a second end which are arranged opposite to each other in the axial direction, wherein the first end is used for plugging with the female plug assembly, and the male plug assembly further comprises: A central conductive column, wherein a first plug-in portion is provided at one end of the central conductive column in a direction toward the first end; A first insulating layer, wherein the first insulating layer covers the outside of the central conductive column, and the first plug-in portion protrudes from the first insulating layer in a direction toward the first end; At least one first conductor layer, the at least one first conductor layer is sleeved in sequence, the at least one first conductor layer includes an innermost first inner conductor layer, the first inner conductor layer is coated outside the first insulating layer, and along the direction toward the first end, the at least one first conductor layer is respectively provided with a second plug-in portion, and the second plug-in portions of the at least one first conductor layer are sequentially distributed along the axial direction; At least one second insulating layer, each of the second insulating layers is coated outside a corresponding first conductive layer; The female plug assembly is provided with a first plug hole and at least one second plug hole, the first plug hole is connected to one of the second plug holes, and the at least one second plug hole is connected in sequence, and the female plug assembly further comprises a capsule assembly, the interior of the capsule assembly is connected to the first plug hole and / or the at least one second plug hole; When the male plug assembly is plugged into the female plug assembly, the first plug-in portion is plugged into the first plug-in hole, and each of the first conductor layers is plugged into a corresponding second plug-in hole, so that the well fluid in the first plug-in hole is discharged to the capsule assembly and / or the well fluid in the second plug-in hole is discharged to the capsule assembly.

2. The fishing cable connector according to claim 1, characterized in that: In a direction toward the first end, the first insulating layer protrudes beyond the first inner conductor layer; and / or, In a direction toward the first end, each of the second insulating layers protrudes from the first conductive layer at its outer layer.

3. The fishing cable connector according to claim 1, characterized in that: The first insulating layer includes a first isolating portion and a first end portion, the first end portion is connected to one end of the first isolating portion facing the first end, one end of the first end portion facing the first isolating portion is provided with a first step surface, one end of the first end portion facing away from the first isolating portion is provided with a first inclined surface, the first isolating portion is arranged between the central conductive column and the first inner conductor layer, the first step surface abuts against the first inner conductor layer, and the first inclined surface is used for guiding during insertion; and / or, Each second insulating layer includes a second isolation portion and a second end portion, the second end portion is connected to one end of the second isolation portion facing the first end, the second end portion facing the second isolation portion is provided with a second step surface, the second end portion is provided with a second inclined surface at one end away from the second isolation portion, the second isolation portion is arranged between two corresponding adjacent first conductor layers, the second step surface abuts against the first conductor layer close to the outer layer, and the second inclined surface is used for guiding during insertion.

4. The fishing cable connector according to claim 1, characterized in that: The male plug assembly further includes a first adapter and a first wire, one end of the first adapter is connected to the first wire, and the other end of the first adapter is connected to an end of the central conductive column toward the second end; and / or, The male plug assembly further includes a second adapter and a second wire, wherein one end of the second adapter is connected to the second wire, and the other end of the second adapter is connected to one end of the first conductor layer toward the second end.

5. The fishing cable connector according to claim 4, characterized in that: The at least one first conductor layer comprises an outermost first outer conductor layer, the at least one second insulating layer comprises an outermost first outer insulating layer, and the first outer insulating layer is coated outside the first outer conductor layer; The male plug assembly also includes a supporting layer and a sleeve, wherein the supporting layer is coated on the outside of the first outer insulating layer, one end of the sleeve is sleeved on the outside of the supporting layer, and the first adapter and the second adapter are arranged in the sleeve.

6. The fishing cable connector according to claim 5, characterized in that: The male plug assembly comprises a limiting cylinder, which is connected to an end of the sleeve away from the supporting layer, and is used for limiting the position during insertion.

7. The fishing cable connector according to claim 6, characterized in that: The male plug assembly also includes a locking pin, which is movably disposed on the limiting cylinder. The locking pin can move radially along the limiting cylinder, and the locking pin is used to move to partially extend out of the limiting cylinder to lock with the female plug assembly.

8. The fishing cable connector according to claim 7, characterized in that: The limiting cylinder comprises a locking hole, the locking hole extends from the outer wall of the limiting cylinder toward the inner wall of the limiting cylinder, and the locking pin is movably disposed in the locking hole; The male plug assembly further comprises an elastic member, one end of which abuts against the locking pin, and the elastic member can drive the locking pin to move toward the inner wall of the limiting cylinder so that the locking pin is received in the locking hole; and / or, The male plug assembly also includes a suction member, which is arranged on the locking pin. The suction member can drive the locking pin to move toward the outer wall of the limiting cylinder so that the locking pin partially extends out of the locking hole.

9. The fishing cable connector according to claim 1, wherein the female plug assembly comprises a third end and a fourth end disposed opposite to each other in the axial direction, wherein the third end is used for plugging with the male plug assembly, and the female plug assembly further comprises: A central conductor layer, wherein the central conductor layer is provided with a first plug hole; a third insulating layer, the third insulating layer covering the outside of the central conductor layer; At least one second conductor layer, the at least one second conductor layer is sleeved in sequence, the at least one second conductor layer includes an innermost second inner conductor layer, the second conductor layer is coated outside the third insulating layer, along the direction towards the third end, the at least one second conductor layer is respectively provided with second insertion holes, and the second insertion holes of the at least one second conductor layer are distributed axially in sequence, wherein the second insertion holes of the at least one second conductor layer are communicated in sequence, and the first insertion hole is communicated with the second insertion hole of the second inner conductor layer; At least one fourth insulating layer, each fourth insulating layer is disposed between two adjacent corresponding second conductor layers.

10. The fishing cable connector according to claim 9, wherein Along the direction towards the third end, the third insulating layer protrudes from the central conductor layer; and / or, Along the direction towards the third end, each fourth insulating layer protrudes from the second conductor layer inside it.

11. The fishing cable connector according to claim 9, wherein The female plug assembly further includes a third adapter and a third wire, one end of the third adapter is connected to the third wire, and the other end of the third adapter is connected to one end of the central conductor layer towards the fourth end; The female plug assembly further includes a fourth adapter and a fourth wire, one end of the fourth adapter is connected to the fourth wire, and the other end of the fourth adapter is connected to one end of the second conductor layer towards the fourth end.

12. The fishing cable connector according to claim 11, wherein The female plug assembly further includes a capsule assembly, the capsule assembly is disposed on one side of the central conductor layer towards the fourth end, the interior of the capsule assembly is communicated with the first insertion hole, and / or, the interior of the capsule assembly is communicated with the second insertion holes of at least one second conductor layer.

13. The fishing cable connector according to claim 12, wherein The capsule assembly includes a first capsule, and the first insertion hole is communicated with the interior of the first capsule; and / or, The capsule assembly includes at least one second capsule, and each second insertion hole is communicated with the interior of a corresponding second capsule.

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