Male plug assembly, female plug assembly, throwing-fishing cable connector and oil extraction equipment

Abstract

The invention relates to the technical field of oil extraction equipment, and discloses a male plug assembly, a female plug assembly, a throwing-fishing cable connector and oil extraction equipment, and the male plug assembly comprises a first end and a second end which are oppositely arranged in the axial direction; the array substrate further comprises a central conductive column, a first insulating layer, at least one first conductor layer and at least one second conductor layer. A first inserting part is arranged at one end of the central conductive column along the direction towards the first end; the first insulating layer wraps the center conductive column, and the first inserting part protrudes out of the first insulating layer in the direction towards the first end; the at least one first conductor layer is sequentially sleeved, the at least one first conductor layer comprises a first inner conductor layer on the innermost layer, the first inner conductor layer wraps the first insulating layer, the at least one first conductor layer is provided with a second inserting part in the direction facing the first end, and the second inserting parts of the at least one first conductor layer are sequentially distributed in the axial direction; each second insulating layer is arranged between two corresponding adjacent first conductor layers.

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 oil production equipment. Background Art

[0002] Conventional fishing cable connectors are divided into two parts when used in oil wells: the upper connector and the lower connector. The upper connector is connected to the lower connector by the traditional three-core plug connection method. The upper connector is connected to the oil pipe through several thousand meters of flexible cable. Because it is a three-core plug, it is connected by the traditional plug-in method. The connection needs to be carried out in an insulating medium, which is difficult to achieve in water. In addition, it is easy to get stuck or not connect properly during connection, resulting in connection failure. 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 salvaging cable connection device and oil production equipment to facilitate the plugging of the upper and lower connectors of the salvaging cable connector.

[0004] According to a first aspect of an embodiment of the present application, a male plug assembly is provided, comprising a first end and a second end arranged opposite to each other in the axial direction, wherein the first end is used to be plugged into a female plug assembly; the male plug assembly also comprises a central conductive column, a first insulating layer, at least one first conductor layer and at least one second insulating layer; a first plug-in portion is provided at one end of the central conductive column in a direction toward the first end; the first insulating layer is coated on 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; the at least one first conductor layer is sequentially sleeved, and the at least one first conductor layer comprises an innermost first inner conductor layer, the first inner conductor layer is coated on the outside of the first insulating layer, and the at least one first conductor layer is respectively provided with a second plug-in portion in a direction toward the first end, and the second plug-in portions of the at least one first conductor layer are sequentially distributed along the axial direction; each second insulating layer is arranged between two corresponding adjacent first conductor layers.

[0005] In one or more optional embodiments above, along a direction toward the first end, the first insulating layer protrudes beyond the first inner conductor layer.

[0006] In one or more optional embodiments above, along the direction toward the first end, each of the second insulating layers protrudes from the first conductor layer of its outer layer.

[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; 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.

[0012] 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.

[0013] In one or more of the above optional embodiments, the male plug assembly also includes a locking pin, which is movably disposed on the limiting cylinder, and 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.

[0014] In one or more optional embodiments above, the limiting cylinder includes 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. 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.

[0015] In one or more of the above optional embodiments, the male plug assembly further includes a suction member, which is disposed on the locking pin and 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.

[0016] According to the second aspect of the present application, a female plug assembly is provided, comprising a third end and a fourth end arranged opposite to each other in the axial direction, the third end being used to be plugged into a male plug assembly; the female plug assembly also comprises 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 plug-in hole; the third insulating layer is coated on the outside of the central conductor layer; the at least one second conductor layer is sequentially sleeved, the at least one second conductor layer comprises an innermost second inner conductor layer, the second conductor layer is coated on the outside of the third insulating layer, and along the direction toward the third end, the at least one second conductor layer is respectively provided with a second plug-in hole, the second plug-in holes of the at least one second conductor layer are sequentially distributed along the axial direction, wherein the second plug-in holes of the at least one second conductor layer are sequentially connected, and the first plug-in hole is connected to the second plug-in hole of the second inner conductor layer; each fourth insulating layer is arranged between two corresponding adjacent second conductor layers.

[0017] In one or more of the above optional embodiments, along a direction toward the third end, the third insulating layer protrudes beyond the central conductor layer.

[0018] In one or more optional embodiments above, along the direction toward the third end, each of the fourth insulating layers protrudes from the second conductor layer within it.

[0019] In one or more optional embodiments above, 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 center conductor layer toward the fourth end; The female plug assembly also 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 an end of the second conductor layer facing the fourth end.

[0020] In one or more of the above optional embodiments, the female plug assembly also includes a capsule assembly, which is arranged on the side of the central conductor layer facing the fourth end, and the interior of the capsule assembly is connected to the first plug-in hole, and / or the interior of the capsule assembly is connected to the second plug-in hole of at least one second conductor layer.

[0021] In one or more optional embodiments above, the capsule assembly includes a first capsule, the first capsule is coated on the outside of the third adapter, and the first plug hole is connected to the interior of the first capsule.

[0022] In one or more optional embodiments above, the capsule assembly includes at least one second capsule, the second capsule is coated on the outside of the fourth adapter, and the second plug hole is connected to the interior of the second capsule.

[0023] According to a third aspect of the present application, there is provided a fishing cable connector, comprising the male plug assembly described above; and / or the female plug assembly described above.

[0024] According to a fourth aspect of the present application, there is provided an oil production equipment, comprising the male plug assembly described above; and / or, the female plug assembly described above.

[0025] The male plug assembly involved in the present application has a first plug-in portion of the central conductive column and a second plug-in portion of each first conductor layer coaxially arranged. When plugged into a matching female plug assembly, alignment is simple, and direct docking of the male plug assembly and the female plug assembly can be smoothly achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0027] Figure 1 A cross-sectional view of a fishing cable connector provided in one embodiment of the present application; Figure 2A cross-sectional view of a male plug assembly provided in one embodiment of the present application; Figure 3 for Figure 2 A partial enlarged view of the male plug assembly is shown; Figure 4 A cross-sectional view of another male plug assembly provided in one embodiment of the present application; Figure 5 A cross-sectional view of a female plug assembly provided in one embodiment of the present application; Figure 6 A cross-sectional view of another female plug assembly provided in one embodiment of the present application; Figure 7 for Figure 6 A partial enlarged view showing the capsule assembly of the female plug assembly being covered on the third adapter; Figure 8 for Figure 6 A partial enlarged view showing the capsule assembly of the female plug assembly being covered on the fourth adapter; Reference numerals: 01, male plug assembly; 01a, first end; 01b, second end; 1, central conductive column; 101, first plug-in portion; 2, first insulating layer; 201, first isolation portion; 202, first end portion; 2021, first step surface; 2022, first outer peripheral surface; 2023, first inclined surface; 203, first extension portion; 231, first sealing groove; 3, first conductor layer; 301, first inner conductor layer; 302, first outer conductor layer; 31, second plug-in portion; 4, second insulating layer; 41, second isolating portion; 42, second end portion; 421, second stepped surface; 422, second outer peripheral surface; 423, second inclined surface; 43, second extension portion; 431, second sealing groove; 401, first outer insulating layer; 5, first adapter; 6, first conductor; 7, second adapter; 8, second conductor; 9, second adapter insulating layer; 10, supporting layer; 11, sleeve; 12, limiting cylinder; 13, locking pin; 14, elastic member; 15, suction member; 02, female plug assembly; 02a, third end; 02b, fourth end; 16, center conductor layer; 16a, first plug hole; 17, third insulating layer; 17a, first connection hole; 18, second conductor layer; 1801, second inner conductor layer; 18a, second plug hole; 18b, flow passage; 19, fourth insulating layer; 19a, second connection hole; 20, third adapter; 20a, first liquid hole; 21, third conductor; 22, fourth adapter; 22a, second liquid hole; 23, fourth conductor; 24, capsule assembly; 241, first capsule; 242, second capsule; 25, third transfer insulating layer; 25a, third sealing groove; 26, first transfer sleeve; 26a, first liquid guide hole; 28, fourth transfer insulating layer; 28a, fourth sealing groove; 29, second transfer sleeve; 29a, second liquid guide hole. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without carrying out creative work are within the scope of protection of this application.

[0029] Technologies, methods, and apparatus known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, such technologies, methods, and apparatus should be considered part of the authorization specification.

[0030] In the description of the present application, it should be noted that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present application. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0031] In the description of the present application, it should be noted that the use of terms such as "first" and "second" to limit components is merely to facilitate the distinction between corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present application.

[0032] The technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0033] Figure 1 This is a cross-sectional view of a fishing cable connector provided in one embodiment of the present application, which is applied to a vertical well or an inclined well. For ease of description, the application of the fishing cable connector to a vertical well is used as an example.

[0034] See also Figure 1 The fishing cable connector includes a male plug assembly 01 and / or a female plug assembly 02. 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 connected to an oil pipe and a submersible unit.

[0035] During the process of lowering the submersible unit, the lead cable is connected to the female plug assembly 02 for electrical conduction, and then one end of the oil pipe is embedded in the female plug assembly 02. After the submersible unit, the female plug assembly 02 and the oil pipe are all lowered into the vertical well, the male plug assembly 01 is inserted from the oil pipe on the ground to be plugged with the female plug assembly 02 to achieve electrical conduction between the submersible unit and the power supply.

[0036] When the submersible unit is in operation, the oil pumped out by it can be transported to the ground through the oil pipeline.

[0037] like Figures 2 to 4 As shown, one embodiment of the present application provides a male plug assembly 01, which includes a first end 01a and a second end 01b arranged opposite to each other along the axial direction. The first end 01a is used to plug with the female plug assembly 02, and the second end 01b is used to be electrically connected to a power supply.

[0038] 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. In the direction toward the first end 01a, a first plug-in portion 101 is provided at one end of the central conductive column 1. The first insulating layer 2 is coated on the outside of the central conductive column 1, and in the direction toward the first end 01a, the first plug-in portion 101 protrudes from the first insulating layer 2. At least one first conductor layer 3 is sequentially sleeved, 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 on the outside of the first insulating layer 2. In the direction toward the first end 01a, at least one first conductor layer 3 is respectively provided with a second plug-in portion 31, and the second plug-in portion 31 of at least one first conductor layer 3 is sequentially distributed along the axial direction. Each second insulating layer 4 is coated on the outside of a corresponding first conductor layer 3. Among them, the above-mentioned axial direction refers to the direction from the first end 01a to the second end 01b.

[0039] In some embodiments, the central conductive column 1 is conductive and generally has a slender columnar structure. When the male plug assembly 01 is plugged into the female plug assembly 02, the first plug portion 101 is used to at least partially contact the female plug assembly to form electrical conduction. One end of the central conductive column 1 facing the second end 01b is electrically connected to a power supply.

[0040] like Figure 2 As shown, in some embodiments, along the radial direction of the male plug assembly 01 from the inside to the outside, the central conductive column 1, the first insulating layer 2, and the first inner conductor layer 301 are sequentially arranged. The first insulating layer 2 is generally cylindrical, and the first insulating layer 2 is arranged between the central conductive column 1 and the first inner conductor layer 301, so that the central conductive column 1 and the first inner conductor layer 301 are insulated. In the direction toward the first end 01a, the first plug portion 101 protrudes from the first insulating layer 2, so that the first plug portion 101 can contact the female plug assembly.

[0041] like Figure 2 As shown, in some embodiments, at least one first conductor layer 3 is respectively in the shape of a hollow cylinder, and the inner diameter of at least one first conductor layer 3 increases successively from the inside to the outside along the circumference of the male plug assembly 01, so that at least one first conductor layer 3 can be sequentially sleeved, and at least one first conductor layer 3 is coaxially arranged with the central conductive column 1.

[0042] It should be noted that the first inner conductor layer 301 is located in the innermost layer relative to the layout position of each first conductor layer 3, that is, the first inner conductor layer 301 is located in the innermost layer of at least one first conductor layer 3, but does not mean that the first inner conductor layer 301 is located in the innermost layer of the entire male plug assembly 01.

[0043] Please combine Figure 2 See also Figure 4 In some embodiments, each first conductor layer 3 is conductive. When the male plug assembly 01 is plugged and fixed to the female plug assembly 02, the second plug portion 31 is used to at least partially contact the female plug assembly 02 for electrical conduction. One end of each first conductor layer 3 facing the second end 01b is electrically connected to the power supply. Among them, the second plug portion 31 of at least one first conductor layer 3 is distributed in sequence along the axial direction of the male plug assembly 01, that is, along the direction toward the first end 01a, the second plug portion 31 of the first conductor layer 3 located relatively in the inner layer protrudes from the second plug portion 31 of the first conductor layer 3 located relatively in the outer layer.

[0044] In some embodiments, a gap is provided between two adjacent first conductor layers 3, and each second insulating layer 4 is disposed in the gap between the corresponding two adjacent first conductor layers 3, so that the two adjacent first conductor layers 3 are insulated by the second insulating layer 4. In the direction toward the first end 01a, the first conductor layer 3 located at the inner layer relatively to the second insulating layer 4 has its second plug-in portion 31 protruding from the second insulating layer 4, so that the second plug-in portion 31 of each first conductor layer 3 can contact the female plug assembly.

[0045] In this embodiment, the number of the first conductor layer 3 is two for illustration. 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 a second plug-in portion 31. 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, and the second insulating layer 4 is coated outside the first inner conductor layer 301, and the first outer conductor layer 302 is coated outside the second insulating layer 4, so that the first inner conductor layer 301 and the first outer conductor layer 302 are insulated. In the direction toward 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 plug-in portion 31 of the first inner conductor layer 301 and the second plug-in portion 31 of the first outer conductor layer 302 are sequentially distributed along the axial direction, and the second plug-in portion 31 of the first inner conductor layer 301 protrudes from the second insulating layer 4, so that the second plug-in portion 31 of the first inner conductor layer 301 and the second plug-in portion 31 of the first outer conductor layer 302 can both contact with 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 one or three, which is not limited here. 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.

[0046] The male plug assembly 01 involved in the present application, the first plug-in portion 101 of the central conductive column 1 and the second plug-in portion 31 of each first conductor layer 3 are coaxially arranged. When plugged into the female plug assembly 02 adapted thereto, alignment is simple, and direct docking of the male plug assembly 01 and the female plug assembly can be smoothly achieved.

[0047] In some embodiments, the first insulating layer 2 and the second insulating layer 4 are sequentially formed by injection molding, 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 here.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] It should be noted that the aforementioned first plug-in portion 101 protrudes from the first insulating layer 2 along the direction toward the first end 01a specifically refers to: when the first insulating layer 2 includes the first isolating portion 201 and the first end portion 202, but does not include the first extension portion 203, along the direction toward the first end 01a, the first plug-in portion 101 protrudes from the first end portion 202. When the first insulating layer 2 includes the first isolating portion 201, the first end portion 202 and the first extension portion 203, along the direction toward the first end 01a, the first plug-in portion 101 protrudes from the first extension portion 203.

[0053] In order to reduce the situation where two adjacent first inner conductor layers 301 are in contact and 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 plug-in portion 31 of the first conductor layer 3 of its outer layer, but does not protrude from the second plug-in portion 31 of the first conductor layer 3 of its inner layer. In this way, the second plug-in portions 31 of two adjacent first conductor layers 3 are separated by the portion of the first insulating layer 2 protruding from the second plug-in portions 31. Compared with the presence of a gap between two adjacent second plug-in portions 31, the situation where two adjacent second plug-in portions 31 are short-circuited due to the adhesion of liquid dielectric (such as water contained in well fluid) to the gap between two adjacent second plug-in portions 31 and the second plug-in portions 31 is avoided.

[0054] To facilitate the insertion of the male plug assembly 01 and the female plug assembly 02, 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 step surface 421 is provided at one end of the second end portion 42 facing the second isolation portion 41, and the second step surface 421 abuts against the first conductor layer 3 on the outer layer. A second inclined surface 423 is provided at one 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.

[0055] Furthermore, in the direction toward the first end 01a, the second stepped surface 421 is connected to the second inclined surface 423 through the second outer peripheral surface 422. From the inside to the outside along the radial direction of the male plug assembly 01, the second outer peripheral surface 422 and the outer peripheral surface of the second plug-in portion 31 of the first conductor layer 3 facing away from the central conductive column 1 are flush. Therefore, along the plug-in direction of the male plug assembly 01, the second end portion 42 contacts the female plug assembly 02 before the second plug-in portion 31 of the first conductor layer 3, thereby ensuring the strength of the first conductor layer 3.

[0056] 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 to guide when plugging. The outer peripheral surface of the second extension portion 43 is provided with a second sealing groove 431, and a sealing ring (not marked in the figure) is provided in the second sealing groove 431. When the male plug assembly 01 is plugged into the female plug assembly, the sealing ring is used to abut against the female plug assembly to form a seal, so as to prevent the well fluid between the two adjacent first conductor layers 3 from being connected and causing insulation failure.

[0057] In order to provide a reliable electrical connection between the central conductive column 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 column 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 secure and stable connection can be provided through the first adapter 5, the reliability of electrical contact is improved, and the problem of current interruption or poor contact is avoided.

[0058] In order 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 secure and stable connection can be provided through the second adapter 7, the reliability of electrical contact is improved, and the problem of current interruption or poor contact is avoided.

[0059] In some embodiments, a first transition insulating layer (not marked in the figure) is provided between the first transition component 5 and the adjacent second transition component 7 to prevent electrical conduction between the first transition component 5 and the second transition component 7. It is understandable that in some other embodiments, the first transition insulating layer may be an end of the first insulating layer 2 facing the second end 01b.

[0060] In some embodiments, a second transition insulating layer 9 is disposed between two adjacent second transition members 7 to prevent conduction between the two adjacent second transition members 7. It is understood that in some other embodiments, the second transition insulating layer 9 may be an end of the second insulating layer 4 facing the second end 01b.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] In some embodiments, the male plug assembly 01 also includes a suction member 15. The suction member 15 is arranged on the locking pin 13, and the suction member 15 can drive the locking pin 13 to move toward the outer wall of the limiting cylinder 12, so that the locking pin 13 partially extends out of the locking hole. The suction member 15 is electrically connected to the first wire 6 and / or the second wire 8. When the male plug assembly 01 is plugged into the female plug assembly, the first wire 6 and the second wire 8 are energized to supply power to the suction member 15, so that the suction member 15 drives the locking pin 13 to move to partially extend out of the locking hole, thereby making the locking pin 13 connected and locked with the female plug assembly. The suction member 15 is an electromagnet. It can be understood that in some other embodiments, the suction member 15 can also be set to other structures, such as a motor, etc., which are not limited here.

[0068] like Figures 5 to 8 As shown, one embodiment of the present application provides a female plug assembly 02, which includes a third end 02a and a fourth end 02b arranged opposite to each other in the axial direction. The third end 02a is used to plug with the male plug assembly 01, and the fourth end 02b is used to connect with the oil pipe and the submersible unit.

[0069] 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 plug hole 16a, and the third insulating layer 17 is coated on the outside of the central conductor layer 16. At least one second conductor layer 18 is sequentially sleeved, and at least one second conductor layer 18 includes an innermost second inner conductor layer 1801, and the second inner conductor layer 1801 is coated on the outside of the third insulating layer 17. In the direction toward the third end 02a, at least one second conductor layer 18 is respectively provided with a second plug hole 18a, and the second plug holes 18a of at least one second conductor layer 18 are sequentially distributed along the axial direction, wherein the second plug holes 18a of at least one second conductor layer 18 are sequentially connected, and the first plug hole 16a is connected to the second plug hole 18a of the second inner conductor layer 1801. Each fourth insulating layer 19 is coated on the outside of a corresponding second conductor layer 18.

[0070] In some embodiments, the first plug hole 16a penetrates the opposite ends of the central conductor layer 16 along the axial direction, so that the central conductor layer 16 is roughly in the shape of a through hollow cylinder. The central conductor layer 16 is conductive, and the first plug hole 16a is used to accommodate the first plug portion 101 when the male plug assembly 01 is plugged and fixed to the female plug assembly 02, and the inner peripheral wall of the first plug hole 16a contacts the first plug portion 101, so that the central conductor layer 16 and the central conductive column 1 are electrically conductive.

[0071] In some embodiments, the central conductor layer 16, the third insulating layer 17, and the second inner conductor layer 1801 are sequentially arranged along the radial direction of the female plug assembly 02 from the inside to the outside. The third insulating layer 17 is roughly cylindrical, and the third insulating layer 17 is arranged between the central conductor layer 16 and the second inner conductor layer 1801, so that the central conductor layer 16 and the second inner conductor layer 1801 are insulated. In the direction toward 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 plugged into the male plug assembly 01, the third insulating layer 17 can be covered outside the first insulating layer 2, thereby preventing the well fluid between the central conductor layer 16 and the second conductor layer 18 from communicating and causing insulation failure.

[0072] In some embodiments, along the radial direction of the female plug assembly 02 from the inside to the outside, the inner diameter of at least one second conductor layer 18 increases successively, so that at least one second conductor layer 18 is sequentially arranged, and at least one second conductor layer 18 is coaxially arranged with the center conductor layer 16.

[0073] It should be noted that the second inner conductor layer 1801 is located in the innermost layer relative to the layout position of each second conductor layer 18, that is, the second inner conductor layer 1801 is located in the innermost layer of at least one second conductor layer 18, but does not mean that the second inner conductor layer 1801 is located in the innermost layer of the entire female plug assembly 02.

[0074] In some embodiments, along the direction toward the third end 02a, at least one second conductor layer 18 is provided with a second plug hole 18a, and the second plug hole 18a penetrates the two opposite ends of the second conductor layer 18 along the axial direction, so that the second conductor layer 18 is roughly in the shape of a hollow cylinder. Each second conductor layer 18 is conductive, and when the male plug assembly 01 is plugged and fixed to the female plug assembly 02, the second plug hole 18a of each second conductor layer 18 is used to accommodate the second plug portion 31 of a corresponding first conductor layer 3, and the inner peripheral wall of the second plug hole 18a is in partial contact with the second plug portion 31, so that each second conductor layer 18 is conductive with a corresponding first conductor layer 3.

[0075] In some embodiments, a gap is provided between two adjacent second conductor layers 18, and each fourth insulating layer 19 is provided in the gap between the corresponding two adjacent second conductor layers 18, so that the two adjacent second conductor layers 18 are insulated by the fourth insulating layer 19. In the direction toward the third end 02a, the fourth insulating layer 19 protrudes from the second conductor layer 18 of the relatively inner layer, so that when the female plug assembly 02 is plugged into the male plug assembly 01, each fourth insulating layer 19 can be covered on the outside of a corresponding second plug-in portion 31 and / or a corresponding second insulating layer 4, and a seal is formed by abutting between the fourth insulating layer 19 and the second insulating layer 4, thereby avoiding the well fluid connection between the two adjacent second conductor layers 18 and causing insulation failure.

[0076] In some embodiments, along the direction toward the third end 02a, the second plugging holes 18a of at least one second conductor layer 18 are connected in sequence, and the first plugging hole 16a and the second plugging hole 18a of the second inner conductor layer 1801 are connected.

[0077] In some embodiments, the third insulating layer 17 is provided with a first connection hole 17a, and the first plug hole 16a is connected to the second plug hole 18a of the second inner conductor layer 1801 through the first connection hole 17a, and the first connection hole 17a is used to accommodate the first insulating layer 2. When the female plug assembly 02 is plugged 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 between the central conductor layer 16 and the second conductor layer 18 from being connected.

[0078] In some embodiments, a sealing ring is provided in the first sealing groove 231 of the first extension portion 203 . The sealing ring is disposed between the first insulating layer 2 and the third insulating layer 17 to ensure sealing between the central conductor layer 16 and the second conductor layer 18 .

[0079] In some embodiments, each fourth insulating layer 19 is provided with a second connection hole 19a, and the second plug holes 18a of two adjacent second conductor layers 18 are connected through a corresponding second connection hole 19a, and each second connection hole 19a is used to accommodate a corresponding second insulating layer 4. When the female plug assembly 02 is plugged 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 being connected between the two adjacent second conductor layers 18.

[0080] In some embodiments, a sealing ring is provided in the second sealing groove 431 of each second extension portion 43 , and the sealing ring is disposed between a second insulating layer 4 and a corresponding fourth insulating layer 19 to ensure the sealing between two adjacent second conductor layers 18 .

[0081] The female plug assembly 02 involved in the present application has the first connecting hole 16a of the central conductor layer 16 and the second connecting holes 19a of each second conductor layer 18 coaxially arranged. When plugged into the male plug assembly 01 that matches it, the docking is simple, and the direct docking of the male plug assembly 01 and the female plug assembly 02 can be smoothly achieved.

[0082] 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.

[0083] In some embodiments, the third insulating layer 17 and the fourth insulating layer 19 are sequentially molded 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 here.

[0084] To reduce the possibility of short circuit between the central conductor layer 16 and the second inner conductor layer 1801 , in some embodiments, the third insulating layer 17 protrudes from the central conductor layer 16 along a direction toward the third end 02 a .

[0085] To reduce the possibility of short circuit due to contact between two adjacent second conductor layers 18 , in some embodiments, each fourth insulating layer 19 protrudes from the second conductor layer 18 within it along a direction toward the third end 02 a .

[0086] In order to provide a reliable electrical connection between the central conductor layer 16 and the submersible 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, and 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 unit. Among them, one end of the third adapter 20 facing the third end 02a is plugged into the first plug hole 16a of the central conductor layer 16, and the third adapter 20 contacts the central conductor layer 16 to form conduction.

[0087] In some embodiments, the third adapter 20 is coated with a third transfer insulating layer 25 to prevent the third adapter 20 from contacting the well fluid outside it. In the direction toward the third end 02a, the third adapter 20 protrudes from the third transfer insulating layer 25, and the portion of the third adapter 20 protruding from the third transfer insulating layer 25 is inserted into the first plug hole 16a. The end of the third transfer 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 transfer insulating layer 25 is arranged at the end of the first connection hole 17a facing the fourth end 02b, and the outer wall of the third transfer 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.

[0088] In some embodiments, a third sealing groove 25a is provided outside the third transition insulation layer 25, and a sealing ring (not marked in the figure) is provided inside the third sealing groove 25a. The sealing ring is arranged between the third transition insulation layer 25 and the third insulation layer 17 to improve the sealing between the third transition insulation layer 25 and the third insulation layer 17.

[0089] In some embodiments, the female plug assembly 02 further includes a first adapter sleeve 26, and the two ends of the first adapter sleeve 26 are respectively connected to the third adapter 20 and the third wire 21. A first adapter hole (not marked in the figure) is provided inside the first adapter sleeve 26, and one end of the third adapter 20 and one end of the third wire 21 are respectively inserted into the first adapter hole to ensure the connection stability of the third adapter 20 and the third wire 21.

[0090] like Figure 6 As shown, in order to provide a reliable electrical connection between the second conductor layer 18 and the submersible unit, in some embodiments, the female plug assembly 02 includes a fourth adapter 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 adapter 22, and the other end of the fourth adapter 22 is connected to the fourth wire 23, and the fourth wire 23 is electrically connected to the submersible unit. Among them, one end of the fourth adapter 22 facing the third end 02a is plugged into the second plug hole 18a of the second conductor layer 18, and the fourth adapter 22 contacts the second conductor layer 18 to form conduction.

[0091] In some embodiments, the fourth adapter 22 is coated with a fourth transfer insulating layer 28 to prevent the fourth adapter 22 from contacting the well fluid outside the fourth adapter 22. Along the direction toward the third end 02a, the fourth adapter 22 protrudes from the fourth transfer insulating layer 28, and the portion of the fourth adapter 22 protruding from the fourth transfer insulating layer 28 is plugged into the second plug hole 18a. The end of the fourth transfer insulating layer 28 facing the third end 02a is plugged into the second connection hole 19a of the fourth insulating layer 19, and the fourth transfer insulating layer 28 is arranged at the end of the second connection hole 19a facing the fourth end 02b, and 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 adapter 22 from the well fluid outside.

[0092] In some embodiments, a fourth sealing groove 28a is provided outside the fourth transfer insulation layer 28, and a sealing ring (not marked in the figure) is provided inside the fourth sealing groove 28a. The sealing ring is arranged between the fourth transfer insulation layer 28 and the fourth insulation layer 19 to improve the sealing between the fourth transfer insulation layer 28 and the fourth insulation layer 19.

[0093] In some embodiments, the female plug assembly further includes a second adapter sleeve 29. Two ends of the second adapter sleeve 29 are respectively connected to the fourth adapter 22 and the fourth wire 23. A second adapter hole (not marked 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 of the fourth adapter 22 and the fourth wire 23.

[0094] To facilitate storage of excess well fluid after the male plug assembly 01 is plugged 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 the side of the central conductor layer 16 facing the fourth end 02b. The interior of the capsule assembly 24 is communicated with the first plug hole 16a.

[0095] In some embodiments, the capsule assembly 24 includes a first capsule 241, the first plug hole 16a is connected to the interior of the first capsule 241, and the first capsule 241 can contain the well fluid discharged from the first plug hole 16a. The first capsule 241 is coated on the outside of the first adapter sleeve 26, and one end of the first capsule 241 is at least partially coated on the outside of the third adapter insulation layer 25, and the other end of the first capsule 241 is at least partially coated on the outside of the third wire 21. Among them, the inside of the third adapter 20 is provided with a first liquid hole 20a along the axial direction, and the inside of the first adapter sleeve 26 is provided with a first liquid guide hole 26a along the radial direction. The two ends of the first liquid hole 20a are respectively connected to the first plug hole 16a and the first liquid guide hole 26a, and the first liquid guide hole 26a is also connected to the inside of the first capsule 241, so that the well fluid in the first plug hole 16a can enter the inside of the first capsule 241 through the first liquid hole 20a and the first liquid guide hole 26a in sequence.

[0096] 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 is respectively covered on the third adapter insulation layer 25 and the third wire 21, and the well fluid in the first plug hole 16a enters the first capsule 241 through the first liquid 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 well fluid on the outside.

[0097] It is understandable that in some other embodiments, the third adapter insulation layer 25 may be omitted, one end of the first capsule 241 is directly covered on the outside of the third adapter 20, and the first capsule 241 may also isolate the third adapter 20 from the external well fluid.

[0098] In some embodiments, the interior of the capsule assembly 24 is in communication with the second insertion hole 18 a of the at least one second conductor layer 18 .

[0099] In some embodiments, the capsule assembly includes a second capsule 242, the second plug hole 18a is connected to the interior of the second capsule 242, and the second capsule 242 can accommodate the well fluid discharged from the second plug hole 18a. The second capsule 242 is coated on the outside of the second adapter sleeve 29, one end of the second capsule 242 is at least partially coated on the outside of the fourth adapter insulation layer 28, and the other end of the second capsule 242 is at least partially coated on the outside of the fourth conductor 23. Among them, the inside of the fourth adapter 22 is provided with a second liquid hole 22a along the axial direction, and the inside of the second adapter sleeve 29 is provided with a second liquid guide hole 29a along the radial direction. The second liquid guide hole 29a is also connected to the inside of the second capsule 242, so that the well fluid in the second plug hole 18a can enter the inside of the second capsule 242 through the second liquid hole 22a and the second liquid guide hole 29a in sequence.

[0100] It is understandable 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 covered outside the fourth adapter, and the second capsule 242 liquid can also isolate the fourth adapter from the outside well fluid.

[0101] It is understandable that in some other embodiments, the fourth transition insulation layer may be omitted, and one end of the second capsule 242 is directly covered on the outside of the fourth transition piece. The second capsule 242 may also isolate the fourth transition piece from the external well fluid.

[0102] In the embodiment of the present application, since the male plug assembly 01 and the female plug assembly 02 are docked underground, the female plug assembly 02 is first put into the underground, so there will be well fluid in the first plug hole 16a and the second plug hole 18a of the female plug assembly 02. When the first plug part 101 of the male plug assembly 01 is inserted into the first plug hole 16a of the female plug assembly 02, the well fluid in the first plug hole 16a can be discharged from the first liquid hole 20a and the first liquid guide hole 26a to the first capsule 241, and when each second plug part 31 is inserted into a corresponding second plug hole 18a, the well fluid in the second plug hole 18a can be discharged from the second liquid hole 22a and the second liquid guide hole 29a to the second capsule 242, so as to reduce the force required to overcome the resistance to the well fluid when the two are docked, thereby ensuring that the docking of the male and female connector assemblies is more reliable. When the male plug assembly 01 is pulled out from the female plug assembly 02, the well fluid stored last time can be extracted due to the elasticity of the capsule, and the capsule assembly 24 can continue to store the well fluid next time without affecting the secondary docking of the male plug assembly 01 and the female plug assembly 02.

[0103] In the embodiment of the present application, when the male plug assembly 01 and the female plug assembly 02 are docked in place, the central conductive column 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 suction member 15 of the male plug assembly 01 is energized, and the suction member 15 pushes the locking pin 13 to partially extend out of the locking hole, so that one end of the locking pin 13 is inserted into the female plug assembly 02, thereby achieving a 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 plug hole (not shown in the figure) that matches the locking pin 13. When the male plug assembly 01 and the female plug assembly 02 are docked in place, the plug hole is connected to the locking hole, and one end of the locking pin 13 passes through the locking hole and is inserted into the plug hole.

[0104] In an embodiment of the present application, when the male plug assembly 01 is docked with the female plug assembly 02, the first end 202 of the first insulating layer 2 abuts against the third insulating layer 17 of the female plug assembly 02, and the second end 42 of each second insulating layer 4 abuts against a corresponding fourth insulating layer 19, thereby achieving docking and positioning of the male plug assembly 01 and the female plug assembly 02.

[0105] To facilitate readers' understanding of the technical solution of the present application, a description is given below in combination with specific forms of the male plug assembly 01 and the female plug assembly 02 .

[0106] 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 located on the inner side is the first inner conductor layer 301, and the first conductor layer 3 located 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 located on the inner side is the second inner conductor layer 1801, and the second conductor layer 18 located 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.

[0107] In the fishing cable connection device of the present application, the three conductors of the male plug assembly of the connection device are integrated into the same axis, sealed by injection molding, and no guide 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 into the same axis, sealed by injection molding, and easy for the male plug to be inserted during docking to ensure that the docking is in place.

[0108] When the male and female plug assemblies are docked, the sealing ring provided on the first plug-in part of the male plug assembly abuts the first insulating layer and the third insulating layer respectively, and the sealing ring provided on each second plug-in part of the male plug assembly abuts the second insulating layer and the fourth insulating layer respectively, so as to avoid short circuit between two adjacent conductor layers due to mixing of well fluid. After the male and female plug assemblies are docked in place, the suction part is energized so that the suction part drives the locking pin to move partially out of the locking hole, thereby realizing the connection and locking of the male plug assembly and the female plug assembly. Prevent the connection device from being disengaged due to other reasons during operation. Fundamentally solve the reliability of the docking process and avoid the situation where the docking is easy to get stuck.

[0109] The first plug hole and each second plug hole on the female plug assembly are originally soaked with well fluid, which is squeezed into the respective rubber capsules during the docking of the male and female plugs. The capsule assembly has a buffering effect, reduces the docking force, and further ensures that the docking is in place. And when the male plug assembly is pulled out from the female plug assembly, the rubber capsule has elasticity and can squeeze out the well fluid stored in the front, without affecting the secondary docking of the male plug assembly and the female plug assembly.

[0110] In another embodiment of the present application, an oil production equipment is provided, including the above-mentioned male plug assembly and / or female plug assembly, and the specific structures of the male plug assembly and the female plug assembly are not described in detail herein.

[0111] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not used as additional limitations on the content of the present application. The purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the description of the present application; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the present application.

Claims

1. A male plug assembly, comprising a first end and a second end arranged opposite to each other in the axial direction, wherein the first end is used for plugging with a female plug assembly, characterized in that: Also includes: 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 conductor layer.

2. The male plug assembly 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 male plug assembly 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 male plug assembly 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 male plug assembly 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 male plug assembly 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 male plug assembly 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 male plug assembly 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. A female plug assembly, comprising 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 a male plug assembly, characterized in that: Also includes: 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, and along the direction toward the third end, the at least one second conductor layer is respectively provided with second plugging holes, the second plugging holes of the at least one second conductor layer are sequentially distributed along the axial direction, wherein the second plugging holes of the at least one second conductor layer are sequentially connected, and the first plugging hole is connected to the second plugging hole of the second inner conductor layer; At least one fourth insulating layer, each fourth insulating layer is disposed between two corresponding adjacent second conductor layers.

10. The female plug assembly according to claim 9, characterized in that: In a direction toward the third end, the third insulating layer protrudes beyond the central conductor layer; and / or, Along the direction toward the third end, each of the fourth insulating layers protrudes from the second conductive layer inside thereof.

11. The female plug assembly according to claim 9, characterized in that: 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 toward the fourth end; The female plug assembly also 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 an end of the second conductor layer facing the fourth end.

12. The female plug assembly according to claim 11, characterized in that: The female plug assembly also includes a capsule assembly, which is arranged on the side of the central conductor layer facing the fourth end, the interior of the capsule assembly is connected to the first plug hole, and / or the interior of the capsule assembly is connected to the second plug hole of at least one second conductor layer.

13. The female plug assembly according to claim 12, characterized in that: The capsule assembly includes a first capsule, the first plug hole is connected to the interior of the first capsule; and / or, The capsule assembly includes at least one second capsule, and each of the second insertion holes is communicated with the interior of a corresponding one of the second capsules.

14. A fishing cable connector, characterized in that: include: The male plug assembly according to any one of claims 1 to 8; and / or, A female plug assembly as described in any one of claims 9 to 13.

15. An oil production equipment, characterized in that: include: The male plug assembly according to any one of claims 1 to 8; and / or, A female plug assembly as described in any one of claims 9 to 13.

Images