A new type of downhole sensor steel pipe cable connecting device

Abstract

The utility model relates to oil exploitation submersible electric pump downhole sensor steel pipe cable coupling matching facility technical field, it is a kind of new downhole sensor steel pipe cable connecting device, including device body shell, sleeve pipe joint suite, electric connection A, electric connection B, O type sealing ring, motor oil temperature sensor cable;Device body shell and sleeve pipe joint suite are connected by through-hole structure, the axis included angle of device body shell and sleeve pipe joint suite is 30 °;Device body shell includes motor joint and downhole sensor joint, there is spacer in motor joint and downhole sensor joint, spacer is equipped with electric connection hole A and electric connection hole B, electric connection hole A and electric connection A are connected, electric connection hole B and electric connection B are connected, are all fixed by fastening thread installation, brass welding cup is exposed in downhole sensor joint cable cavity, two motor oil temperature sensor cables one end respectively connect motor oil temperature sensor cable joint A and motor oil temperature sensor cable joint B, and the other end of two motor oil temperature sensor cables is welded on the brass welding cup of electric connection A and electric connection B respectively.

Description

Technical Field

[0001] This utility model relates to the technical field of steel pipe and cable connection facilities for downhole sensors of submersible electric pumps in oil extraction, and is a new type of downhole sensor steel pipe and cable connection device. Background Technology

[0002] In the downhole environment of oil extraction, the independent signal lines of downhole sensors are laid using steel conduit cables for connection, which protects the cables from the effects of high pressure, high temperature, and corrosive fluids. In the high-pressure, high-temperature, and corrosive fluid environment of downhole, the steel conduit cables must reliably connect to the sealed downhole sensors. On the one hand, the external mechanical structure must be sealed, resistant to high temperatures and high pressures; on the other hand, the internal electrical connections must be reliable and well-insulated.

[0003] Existing technologies use precision connectors and specialized tools, resulting in high processing barriers and high prices. Summary of the Invention

[0004] This invention provides a novel steel pipe cable connection device for downhole sensors to solve the problems mentioned in the background art.

[0005] The technical problem solved by this utility model is achieved by the following technical solution: A novel downhole sensor steel pipe cable connection device includes a device body shell, a ferrule fitting kit, electrical connection A, electrical connection B, an O-ring, and a motor oil temperature sensor cable; the device body shell and the ferrule fitting kit are connected by a through-hole structure, and the included angle between the axes of the device body shell and the ferrule fitting kit is 30°; the device body shell includes a motor connector and a downhole sensor connector, with an isolation plate between the motor connector and the downhole sensor connector, and electrical connection holes A and B are provided on the isolation plate. Electrical connection holes A and A are connected, and electrical connection holes B and B are connected, both fixed by fastening threads. Brass solder cups are exposed inside the cable cavity of the downhole sensor connector. One end of each of the two motor oil temperature sensor cables is connected to motor oil temperature sensor cable connector A and motor oil temperature sensor cable connector B, respectively, and the other end of each of the two motor oil temperature sensor cables is soldered to the brass solder cups of electrical connection A and electrical connection B, respectively.

[0006] Furthermore, the outer shell of the device is made of 30Cr13 stainless steel.

[0007] Furthermore, the upper part of the electrical connection hole A is an electrical connection sealing cavity, and the lower part of the electrical connection hole A is an electrical connection threaded hole.

[0008] Furthermore, the isolation plate, electrical connection and electrical connection B (18) are all single-core pressure-bearing sealing structural components.

[0009] Furthermore, the motor connector includes 6 motor connector bolt holes, 2 motor connector diagonally disassembly threaded holes, and 2 O-rings.

[0010] Furthermore, the downhole sensor connector is a standard 4.5-inch outer diameter downhole sensor flange concave structure, including 6 standard threaded holes.

[0011] Furthermore, the through-hole structure includes a 30° platform, a ferrule threaded hole, and a cable hole, wherein the ferrule threaded hole includes a cable cavity; the diameter of the cable hole is smaller than the diameter of the cable cavity.

[0012] Furthermore, the ferrule fitting kit includes a ferrule nut kit for connecting the steel pipe cable, an O-ring B, and a straight threaded connector for connecting the housing of the device body. The ferrule fitting kit is installed downwards on the threaded hole of the ferrule connector. One end of the downhole sensor inlet cable is fitted with the downhole sensor inlet cable connector, and the other end passes through the cable hole, is knotted, and then pulled back to place the bare wire of the downhole sensor inlet cable into the cable cavity.

[0013] Beneficial technical effects: This utility model relates to a novel downhole sensor steel pipe cable connection device. The outer shell of the device is made of 30Cr13 stainless steel, and the ferrule fitting is made of 316L stainless steel. Both meet the structural requirements for high pressure resistance, high temperature resistance, and corrosion resistance in the high-pressure, high-temperature, and corrosive fluid environments of oilfields. On one hand, the device solves the problem of mismatched specifications between the downhole sensor flange and the motor flange, enabling a variable-diameter connection between the downhole sensor and the submersible motor. On the other hand, it solves the problem of connecting the steel pipe cable and the downhole sensor, eliminating the need for additional, expensive dedicated steel pipe cable connection kits, thus significantly reducing costs. The device integrates variable-diameter connection and steel pipe cable connection functions, offering high integration, good economy, simple installation and wiring, good insulation, low professional requirements, and strong adaptability. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is an assembly diagram of the present invention; Figure 3 This is a side sectional view of the outer shell of the device body of this utility model; Figure 4 This is a partial sectional view of the outer casing of the device body of this utility model; Figure 5 This is a front view of the outer casing of the device body of this utility model; Figure 6 This is a bottom view of the outer casing of the device body of this utility model; Figure 7 This is a front view of the compression fitting kit of this utility model; Figure 8 This is a three-dimensional structural diagram of the electrical connection structure of this utility model; In the diagram: 1. Device body housing; 2. Motor connector; 3. Downhole sensor connector; 4. Compression fitting kit; 6. Electrical connection A; 9. Downhole sensor inlet cable; 10. Motor oil temperature sensor cable; 11. 30° platform; 12. Cable cavity; 13. Cable hole; 14. Electrical connection hole A; 15. Electrical connection hole B; 16. Electrical connection sealing cavity; 17. Electrical connection threaded hole; 18. Electrical connection B; 19. Compression fitting threaded hole; 21. O-ring groove; 22. Motor connector cavity; 3. Downhole sensor connector cable cavity; 24. Downhole sensor connector recess; 25. Motor connector diagonal disassembly threaded hole; 26. Motor connector bolt hole; 27. Downhole sensor connector threaded hole; 35. Compression fitting nut kit; 36. O-ring B; 37. Straight thread connector; 38. Brass solder cup; 39. Insulation layer 3; 40. Double O-ring; 41. Thread A; 51. Downhole sensor inlet cable connector; 52. Motor oil temperature sensor cable connector A; 53. Motor oil temperature sensor cable connector B. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings. A novel downhole sensor steel pipe cable connection device includes a device body housing 1, a ferrule fitting kit 4, an electrical connection A, an electrical connection B18, an O-ring seal 36, and a motor oil temperature sensor cable 10. The device body housing 1 and the ferrule fitting kit 4 are connected by a through-hole structure, and the included angle between the axes of the device body housing 1 and the ferrule fitting kit 4 is 30°. The device body housing 1 includes a motor connector 2 and a downhole sensor connector 3, with a partition plate between the motor connector 2 and the downhole sensor connector 3. The partition plate is equipped with... Electrical connection holes A14 and B15 are connected to electrical connection A, and electrical connection holes B15 and B18 are connected, all fixed by fastening threads. Brass solder cup 38 is exposed inside the downhole sensor connector cable 9 cavity. One end of the two motor oil temperature sensor cables 10 is connected to motor oil temperature sensor cable connector A52 and motor oil temperature sensor cable connector B53 respectively, and the other end of the two motor oil temperature sensor cables 10 is soldered to the brass solder cup 38 of electrical connection A and electrical connection B18 respectively.

[0016] Furthermore, the outer shell 1 of the device body is made of 30Cr13 stainless steel.

[0017] Furthermore, the upper part of the electrical connection hole A14 is the electrical connection sealing cavity 16, and the lower part of the electrical connection hole A14 is the electrical connection threaded hole 17.

[0018] Furthermore, the isolation plate, electrical connection, and electrical connection B18 are all single-core pressure-bearing and sealing structural components.

[0019] Furthermore, the motor connector 2 includes 6 motor connector bolt holes 26, 2 motor connector diagonal disassembly threaded holes 25, and 2 O-rings 36.

[0020] Furthermore, the downhole sensor connector 3 is a standard 4.5-inch outer diameter downhole sensor flange concave structure, including 6 standard threaded holes.

[0021] Furthermore, the through-hole structure includes a 30° platform 11, a ferrule threaded hole 19, and a cable hole 13. The ferrule threaded hole 19 includes a cable cavity 12. The diameter of the cable hole 13 is smaller than the diameter of the cable cavity 12.

[0022] Furthermore, the ferrule fitting kit 4 includes a ferrule nut kit 35 for connecting the steel pipe cable, an O-ring B, and a straight threaded connector for connecting the housing of the device body. The ferrule fitting kit 4 is installed downward on the threaded hole 19 of the ferrule fitting. One end of the downhole sensor inlet cable is installed with the downhole sensor inlet cable connector 51, and the other end passes through the cable hole. After knotting, it is pulled back to place the bare wire of the downhole sensor inlet cable into the cable cavity 12.

[0023] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution of this utility model, or by designing a similar technical solution inspired by the technical solution of this utility model, falls within the protection scope of this utility model.

Claims

1. A novel steel pipe cable connection device for downhole sensors, characterized in that: The device includes a housing, a tubing fitting, electrical connection A, electrical connection B, an O-ring, and motor oil temperature sensor cables. The housing and the tubing fitting are connected via a through-hole structure, with an included angle of 30° between their axes. The housing includes a motor connector and a downhole sensor connector, separated by an isolation plate. The isolation plate has electrical connection holes A and B, which are connected to each other via fastening threads. Brass solder cups are exposed inside the cable cavity of the downhole sensor connector. One end of each motor oil temperature sensor cable is connected to motor oil temperature sensor cable connector A and motor oil temperature sensor cable connector B, respectively, and the other ends are soldered to the brass solder cups of electrical connection A and electrical connection B, respectively.

2. The novel downhole sensor steel pipe cable connection device according to claim 1, characterized in that: The outer shell of the device is made of 30Cr13 stainless steel.

3. The novel downhole sensor steel pipe cable connection device according to claim 1, characterized in that: The upper part of the electrical connection hole A is an electrical connection sealing cavity, and the lower part of the electrical connection hole A is an electrical connection threaded hole.

4. A novel downhole sensor steel pipe cable connection device according to claim 1, characterized in that: The isolation plate, electrical connection and electrical connection B (18) are all single-core pressure-bearing and sealing structural components.

5. A novel steel pipe cable connection device for downhole sensors according to claim 1, characterized in that: The motor connector includes 6 motor connector bolt holes, 2 motor connector diagonally disassembly threaded holes, and 2 O-rings.

6. A novel downhole sensor steel pipe cable connection device according to claim 1, characterized in that: The downhole sensor connector is a standard 4.5-inch outer diameter downhole sensor flange concave structure, including 6 standard threaded holes.

7. A novel downhole sensor steel pipe cable connection device according to claim 1, characterized in that: The through-hole structure includes a 30° platform, a ferrule threaded hole, and a cable hole. The ferrule threaded hole includes a cable cavity. The diameter of the cable hole is smaller than the diameter of the cable cavity.

8. A novel downhole sensor steel pipe cable connection device according to claim 1, characterized in that: The described ferrule fitting kit includes a ferrule nut kit for connecting the steel pipe cable, an O-ring B, and a straight threaded connector for connecting the outer shell of the device body. The ferrule fitting kit is installed downward on the threaded hole of the ferrule connector. One end of the downhole sensor inlet cable is fitted with a downhole sensor inlet cable connector, and the other end passes through the cable hole, is knotted, and then pulled back to place the bare wire of the downhole sensor inlet cable into the cable cavity.

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