Cable adapter, tubing connection structure, and screw pump

Abstract

The embodiment of the present application relates to the technical field of oil extraction equipment, and discloses a cable adapter, a tubing connection structure and a screw pump, which comprises an adapter body, one end of the adapter body is used for allowing a first cable to pass through, and the other end of the adapter body is used for allowing a second cable to pass through; a conductive connecting piece is arranged in the adapter body, and two ends of the conductive connecting piece are used for connecting the first cable and the second cable respectively; a sleeve is arranged in the adapter body, one end of the sleeve is sleeved outside the conductive connecting piece, and the other end of the sleeve is used for allowing the second cable to pass through; and an insulating layer is arranged at one end of the sleeve away from the conductive connecting piece, and the insulating layer is used for fixedly connecting the second cable to the sleeve. Through the above mode, the sealing performance of the cable in a high-temperature environment can be improved.

Description

Technical Field

[0001] This application relates to the field of oil production equipment technology, and in particular to a cable adapter, an oil pipe connection structure, and a screw pump. Background Technology

[0002] Submersible screw pumps, as a new oil extraction technology, generally consist of tubing and a screw pump unit. The tubing extends from the wellhead downhole to connect with the screw pump unit, allowing the well fluid pumped by the unit to be output to the surface. In related technologies, the tubing is typically connected to the screw pump unit via a cable. The tubing consists of an inner tube and an outer tube, with the outer tube covering the outside of the inner tube. The cable is located between the inner and outer tubes, and the well fluid flows through the inner tube. The outer tube usually also has an adapter for connecting other pipelines. The cable can be threaded through the adapter to connect to the screw pump unit. The adapter typically uses a compression seal to seal the cable.

[0003] The inventors of this application have discovered that during the process of well fluid flowing through the inside of the adapter, the high temperature of the well fluid can easily cause the internal seal of the adapter to fail. Utility Model Content

[0004] In view of the above problems, embodiments of this application provide a cable adapter, an oil pipe connection structure, and a screw pump, which overcome the above problems or at least partially solve the above problems.

[0005] According to one aspect of this application, a cable adapter is provided, comprising an adapter body, one end of which is for a first cable to pass through, and the other end of which is for a second cable to pass through; a conductive connector disposed within the adapter body, the two ends of which are respectively used to connect the first cable and the second cable; a sleeve disposed within the adapter body, one end of which is fitted over the conductive connector, and the other end of which is for the second cable to pass through; and an insulating layer disposed at the end of the sleeve opposite to the conductive connector, the insulating layer being used to fix the second cable to the sleeve.

[0006] In one alternative embodiment, the adapter body is provided with a communicating mounting cavity and a first cable passage hole, and the conductive connector and the sleeve are respectively disposed in the mounting cavity; the first cable passage hole is used for a first cable to pass through, and the mounting cavity is used to accommodate one end of the first cable.

[0007] In one alternative embodiment, the conductive connector is provided with a first connecting groove, which is located at one end of the conductive connector facing the first wire through hole, and the first connecting groove is used to connect a first cable; and / or, the conductive connector is provided with a second connecting groove, which is located at one end of the conductive connector away from the first wire through hole, and the second connecting groove is used to connect a second cable.

[0008] In one alternative embodiment, the sleeve is provided with a mounting groove and a second wire passage hole, the two ends of the mounting groove are respectively connected to the first wire passage hole and the second wire passage hole, and the conductive connector is disposed in the mounting groove; the second wire passage hole is used for a second cable to pass through, and the mounting groove is used to accommodate one end of the second cable; the conductive connector is located in the mounting groove, one end of the second cable is connected to the conductive connector, and the other end of the second cable passes through the second wire passage hole.

[0009] In one alternative embodiment, the end of the sleeve opposite to the conductive connector is provided with a connecting post, and the second wire through hole is at least partially disposed on the connecting post; the insulating layer covers the outer wall of the connecting post, and the insulating layer is also used to cover the second cable.

[0010] In one alternative embodiment, the cable adapter further includes a locking element detachably connected to the adapter body, the locking element abutting against the end of the sleeve opposite to the conductive connector.

[0011] In one alternative embodiment, the cable adapter further includes a limiting member disposed within the adapter body, one end of the limiting member abutting against the adapter body, and the other end of the limiting member abutting against the end of the sleeve opposite to the insulation layer, and / or, the other end of the limiting member abutting against the end of the conductive connector opposite to the insulation layer.

[0012] In one alternative embodiment, the cable adapter further includes a first seal disposed between the conductive connector and the sleeve; and / or, the cable adapter further includes a second seal disposed between the sleeve and the adapter body.

[0013] According to another aspect of this application, an oil pipe connection structure is provided, including a first oil pipe, a second oil pipe, and a cable adapter as described above. A first cable is threaded through the first oil pipe, and a second cable is threaded through the second oil pipe. The two ends of the cable adapter are respectively connected to the first oil pipe and the second oil pipe. The first cable and the second cable are respectively threaded through the cable adapter, and the first cable and the second cable are respectively connected to the cable adapter.

[0014] According to another aspect of this application, a screw pump is provided that includes the cable adapter as described above, or the screw pump includes the tubing connection structure as described above.

[0015] The beneficial effects of this application embodiment are as follows: Unlike the prior art, this application embodiment includes an adapter body, a conductive connector, a sleeve, and an insulating layer. One end of the adapter body is for a first cable to pass through, and the other end is for a second cable to pass through. The conductive connector is disposed within the adapter body, with its two ends used to connect the first and second cables, respectively. The sleeve is disposed within the adapter body, with one end fitted over the conductive connector and the other end for the second cable to pass through. The insulating layer is disposed at the end of the sleeve opposite to the conductive connector, and is used to fix the second cable to the sleeve. This arrangement allows the insulating layer to fix the second cable to the sleeve, providing a sealing and protective function. Simultaneously, the insulating layer provides some isolation against the high temperature generated by the well fluid flowing through the inner tube, reducing the impact of the high-temperature environment on the second cable located inside the sleeve. This ensures that the second cable can be properly sealed under the action of the sleeve, thereby improving the sealing performance of the cable in high-temperature environments. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a partial structural schematic diagram of the oil pipe connection structure according to an embodiment of this application; Figure 2 This is a partial side sectional view of the oil pipe connection structure according to an embodiment of this application; Figure 3 yes Figure 2 Enlarged schematic diagram of the structure at point A in the middle. Detailed Implementation

[0018] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0020] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0021] It should be noted that: In this application, the application of the cable adapter 30 to the oil pipe connection structure 1000 is used as an example for illustration. The cable adapter 30 is used to connect the first cable 11 and the second cable 12. It can be understood that the cable adapter 30 can also be applied to other pipe connection equipment, such as industrial pipeline systems, hydraulic systems, air conditioning systems, etc.

[0022] Please see Figure 1 and Figure 2 The oil pipe connection structure 1000 includes a first oil pipe 10, a second oil pipe 20, and a cable adapter 30. The cable adapter 30 connects the first oil pipe 10 and the second oil pipe 20 respectively, and is used to realize the connection and communication between the first oil pipe 10 and the second oil pipe 20. A first cable 11 is passed through the first oil pipe 10, and a second cable 12 is passed through the second oil pipe 20. The first cable 11 and the second cable 12 are connected through the cable adapter 30.

[0023] For the aforementioned cable adapter 30, such as Figure 2 and Figure 3As shown, the cable adapter 30 includes an adapter body 31, a conductive connector 32, a sleeve 33, and an insulating layer 34. One end of the adapter body 31 is for a first cable 11 to pass through, and the other end is for a second cable 12 to pass through. The conductive connector 32 is disposed inside the adapter body 31, and its two ends are used to connect the first cable 11 and the second cable 12, respectively. The sleeve 33 is disposed inside the adapter body 31, with one end of the sleeve 33 fitted over the conductive connector 32, and the other end for the second cable 12 to pass through. The insulating layer 34 is disposed at the end of the sleeve 33 facing away from the conductive connector 32. The insulating layer 34 is used to fix the second cable 12 to the casing 33. This configuration allows the insulating layer 34 to securely connect the second cable 12 to the casing 33, providing a sealing and protective function for the second cable 12. Simultaneously, the insulating layer 34 provides some isolation from the high temperature generated by the well fluid flowing through the inner casing, reducing the impact of the high-temperature environment on the second cable 12 located within the casing 33. This ensures that the second cable 12 can be properly sealed under the action of the casing 33, thereby improving the sealing performance of the cable in high-temperature environments. In some embodiments, the insulating layer 34 is made of multiple layers of insulating tape, ensuring reliable sealing performance under high temperature and high pressure environments.

[0024] In some embodiments, the adapter body 31 is provided with a communicating mounting cavity 31a and a first wire passage hole 31b. A conductive connector 32 and a sleeve 33 are respectively disposed within the mounting cavity 31a. The first wire passage hole 31b is used for the passage of a first cable 11, and the mounting cavity 31a is used to accommodate one end of the first cable 11. The first cable 11 passes through the first wire passage hole 31b and connects to the conductive connector 32. The mounting cavity 31a can be used to accommodate components such as the sleeve 33 and the conductive connector 32, while the first wire passage hole 31b allows the first cable 11 to pass through.

[0025] In some embodiments, the conductive connector 32 is provided with a first connecting groove 321, which is located at one end of the conductive connector 32 facing the first wire through hole 31b. The first connecting groove 321 is used to connect the first cable 11, thereby realizing the connection between the first cable 11 and the conductive connector 32. It is understood that the first connecting groove 321 on the conductive connector 32 can also be omitted according to actual needs, and the connection method between the conductive connector 32 and the first cable 11 can also be welding, crimping, threaded connection, or snap-fit ​​connection.

[0026] In some embodiments, the conductive connector 32 is provided with a second connecting groove 322, which is located at the end of the conductive connector 32 opposite to the first wire through hole 31b. The second connecting groove 322 is used to connect the second cable 12, thereby realizing the connection between the second cable 12 and the conductive connector 32, and thus completing the electrical connection between the first cable 11 and the second cable 12. It is understood that the second connecting groove 322 on the conductive connector 32 can also be omitted according to actual needs, and the connection method between the conductive connector 32 and the second cable 12 can also be welding, crimping, threaded connection, or snap-fit ​​connection. In some embodiments, the conductive connector 32 is a copper sleeve.

[0027] In some embodiments, the sleeve 33 is provided with a mounting groove 33a and a second wire passage hole 33b. The two ends of the mounting groove 33a are respectively connected to the first wire passage hole 31b and the second wire passage hole 33b. A conductive connector 32 is disposed in the mounting groove 33a. The second wire passage hole 33b is used for the second cable 12 to pass through. The mounting groove 33a is used to accommodate one end of the second cable 12. The conductive connector 32 is located in the mounting groove 33a. One end of the second cable 12 is connected to the conductive connector 32, and the other end of the second cable 12 passes through the second wire passage hole 33b. The sleeve 33 can seal and limit the second cable 12 located therein.

[0028] In some embodiments, the end of the sleeve 33 facing away from the conductive connector 32 is provided with a connecting post 332, and a second wire through hole 33b is at least partially provided in the connecting post 332. The second cable 12 passes through the connecting post 332, and an insulating layer 34 covers the outer wall of the connecting post 332. The insulating layer 34 is also used to cover the second cable 12. The connecting post 332 allows the second cable 12 to pass through, and at the same time, the second cable 12 is fixedly connected to the connecting post 332 through the insulating layer 34.

[0029] In some embodiments, the sleeve 33 includes a tube body 331 that is interconnected with the connecting post 332, wherein the diameter of the connecting post 332 is smaller than the diameter of the tube body 331.

[0030] In some embodiments, the insulating layer 34 includes a first heat-insulating column 341, a heat-insulating cone 342, and a second heat-insulating column 343 connected in sequence. The first heat-insulating column 341 covers the connecting column 332 and is located between the limiting member 38 and the connecting column 332. The second heat-insulating column 343 covers the outer wall of the second cable 12. The first heat-insulating column 341 reduces the impact of the high temperature generated by the well fluid flowing through the inner tube on the connecting column 332 and the second cable 12 located on the connecting column 332. The heat-insulating cone 342 provides heat insulation for the second cable 12 extending from the mounting cavity 31a. The second heat-insulating column 343 provides heat insulation for the second cable 12 located outside the mounting cavity 31a, thereby achieving heat insulation for the second cable 12 at different locations. In some embodiments, the insulating layer 34 is an insulating sealing tape, which is installed on the casing 33 by wrapping.

[0031] In some embodiments, the cable adapter 30 further includes a locking member 35, which is detachably connected to the adapter body 31. The locking member 35 abuts against the end of the sleeve 33 facing away from the conductive connector 32, and is used to confine the sleeve 33 within the adapter body 31. In some embodiments, the end of the tube body 331 near the connecting post 332 abuts against the locking member 35. The locking member 35 abuts against the end of the tube body 331 near the connecting post 332 to limit and fix the sleeve 33 within the mounting cavity 31a of the adapter body 31, while also restricting axial movement of the sleeve 33. In some embodiments, the locking member 35 is a nut, and the nut is threadedly connected to the adapter body 31.

[0032] In some embodiments, the cable adapter 30 further includes a limiting member 38 disposed within the adapter body 31. One end of the limiting member 38 abuts against the adapter body 31, and the other end abuts against the end of the sleeve 33 opposite to the insulation layer 34. The limiting member 38 can limit the sleeve 33, reducing axial movement of the sleeve 33. In some embodiments, the other end of the limiting member 38 abuts against the end of the conductive connector 32 opposite to the insulation layer 34. The limiting member 38 can limit the conductive connector 32, preventing axial movement of the conductive connector 32 under high voltage conditions.

[0033] In some embodiments, the limiting member 38 is made of a non-metallic material, including but not limited to one or more of flexible graphite and polytetrafluoroethylene.

[0034] In some embodiments, the cable adapter 30 further includes a first seal 36 disposed between the conductive connector 32 and the sleeve 33. The first seal 36 improves the airtightness between the conductive connector 32 and the sleeve 33, and reduces gas retention between the sleeve 33 and the conductive connector 32, preventing gas expansion within the sleeve 33 under high-temperature conditions. Simultaneously, when gas expands within the sleeve 33, a gap can easily appear between the sleeve 33 and the second cable 12. Under external high temperature and pressure conditions, a portion of the insulation layer 34 can be squeezed into the gap between the sleeve 33 and the second cable 12, potentially causing seal failure. In some embodiments, the first seal 36 is a sealing ring. It is understood that the first seal 36 can also be omitted as needed.

[0035] In some embodiments, the cable adapter 30 further includes a second seal 37 disposed between the sleeve 33 and the adapter body 31. The second seal 37 can be used to improve the airtightness between the sleeve 33 and the adapter body 31, preventing leakage through the gap between the sleeve 33 and the adapter body 31. In some embodiments, the second seal 37 is a sealing ring. It is understood that the second seal 37 may also be omitted as needed.

[0036] For the first oil pipe 10 and the second oil pipe 20 mentioned above, as Figures 1-3 As shown, a first oil pipe 10 is fitted with a first cable 11, and a second oil pipe 20 is fitted with a second cable 12. The two ends of a cable adapter 30 are connected to the first oil pipe 10 and the second oil pipe 20, respectively. The first cable 11 and the second cable 12 are connected to the cable adapter 30, respectively. It can be understood that the connection methods between the first oil pipe 10 and the cable adapter 30, and between the second oil pipe 20 and the cable adapter 30, include, but are not limited to, threaded connections, flange connections, welded connections, compression fitting connections, barbed connections, etc.

[0037] In some embodiments, the second oil pipe 20 extends radially with a limiting protrusion 201, and the limiting protrusion 201 is provided with a third cable passage hole 201a. The third cable passage hole 201a communicates with the mounting cavity 31a, and the connecting cable 11 can extend out from the third cable passage hole 201a. During the process of connecting the second oil pipe 20 to the cable adapter 30, the limiting protrusion 201 can be used to restrict the second oil pipe 20 from moving axially toward the cable adapter 30, and the third cable passage hole 201a allows the second cable 12 to pass through and connect to other electrical equipment.

[0038] In this embodiment, an adapter body 31, a conductive connector 32, a sleeve 33, and an insulating layer 34 are provided. One end of the adapter body 31 is for a first cable 11 to pass through, and the other end is for a second cable 12 to pass through. The conductive connector 32 is disposed inside the adapter body 31, and its two ends are used to connect the first cable 11 and the second cable 12, respectively. The sleeve 33 is disposed inside the adapter body 31, with one end fitted over the conductive connector 32 and the other end for the second cable 12 to pass through. The insulating layer 34 is disposed at the end of the sleeve 33 facing away from the conductive connector 32, and the insulating layer 34 is used for... The second cable 12 is fixedly connected to the casing 33. With this configuration, the insulation layer 34 can fix the second cable 12 to the casing 33. The insulation layer 34 can seal and protect the second cable 12, preventing external liquid from entering the casing 33. At the same time, the insulation layer 34 can isolate the high temperature generated by the well fluid flowing through the inner tube, so as to reduce the impact of the high temperature environment on the second cable 12 located in the casing 33. This ensures that the second cable 12 can be properly sealed under the action of the casing 33, thereby improving the sealing performance of the cable in the high temperature environment.

[0039] This application also provides an embodiment of a screw pump, which includes the cable adapter 30 as described above. The function and structure of the cable adapter 30 can be found in the above embodiments, and will not be repeated here.

[0040] This application also provides an embodiment of a screw pump, which includes the oil pipe connection structure 1000 as described above. The function and structure of the oil pipe connection structure 1000 can be found in the above embodiments, and will not be repeated here.

[0041] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A cable adapter for connecting a first cable and a second cable, characterized in that, include: An adapter body, one end of which is used for a first cable to pass through, and the other end of which is used for a second cable to pass through; A conductive connector is disposed within the adapter body, and the two ends of the conductive connector are respectively used to connect a first cable and a second cable; A sleeve is disposed within the body of the adapter, one end of which is fitted over the conductive connector, and the other end of which is used for the passage of a second cable. An insulating layer is provided at one end of the sleeve away from the conductive connector, and the insulating layer is used to fix the second cable to the sleeve.

2. The cable adapter according to claim 1, characterized in that, The adapter body is provided with a connected mounting cavity and a first wire passage hole, and the conductive connector and the sleeve are respectively disposed in the mounting cavity; The first cable pass-through hole is used for the first cable to pass through, and the mounting cavity is used to accommodate one end of the first cable.

3. The cable adapter according to claim 2, characterized in that, The conductive connector is provided with a first connecting groove, which is located at one end of the conductive connector facing the first wire through hole, and the first connecting groove is used to connect a first cable; and / or The conductive connector is provided with a second connecting groove, which is located at one end of the conductive connector away from the first wire hole, and the second connecting groove is used to connect a second cable.

4. The cable adapter according to claim 2, characterized in that, The sleeve is provided with a mounting groove and a second wire passage hole. The two ends of the mounting groove are respectively connected to the first wire passage hole and the second wire passage hole. The conductive connector is disposed in the mounting groove. The second cable pass hole is used for the second cable to pass through, and the mounting groove is used to receive one end of the second cable; The conductive connector is located in the mounting groove, one end of the second cable is connected to the conductive connector, and the other end of the second cable passes through the second wire hole.

5. The cable adapter according to claim 4, characterized in that, The end of the sleeve away from the conductive connector is provided with a connecting post, and the second wire hole is at least partially provided on the connecting post; The insulating layer covers the outer wall of the connecting post, and the insulating layer is also used to cover the second cable.

6. The cable adapter according to claim 1, characterized in that, The cable adapter also includes a locking element, which is detachably connected to the adapter body and abuts against the end of the sleeve opposite to the conductive connector.

7. The cable adapter according to claim 1, characterized in that, The cable adapter also includes a limiting member, which is disposed in the adapter body, and one end of the limiting member abuts against the adapter body; The other end of the limiting member abuts against the end of the sleeve opposite to the insulating layer, and / or the other end of the limiting member abuts against the end of the conductive connector opposite to the insulating layer.

8. The cable adapter according to any one of claims 1-7, characterized in that, The cable adapter further includes a first seal disposed between the conductive connector and the sleeve; and / or The cable adapter also includes a second seal, which is disposed between the sleeve and the adapter body.

9. A tubing connection structure, characterized in that, include: A first oil pipe, through which a first cable is threaded; A second oil pipe, through which a second cable is threaded; The cable adapter as described in any one of claims 1-8, wherein the two ends of the cable adapter are respectively connected to the first oil pipe and the second oil pipe, the first cable and the second cable are respectively passed through the cable adapter, and the first cable and the second cable are respectively connected to the cable adapter.

10. A screw pump, characterized in that, include: The cable adapter as described in any one of claims 1-8; or, The oil pipe connection structure as described in claim 9.

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