A cable insulation crossing device for oil wellheads

Abstract

The application relates to a petroleum wellhead cable insulation crossing device, belonging to the technical field of oil and gas exploitation, which comprises a flange, a cable crossing device arranged on the top of the flange and a connecting sleeve fixedly connected to the top of the flange, the cable crossing device is fixedly connected to the top of the connecting sleeve, a transmission structure for assisting cable body transmission is arranged on the outside of the cable crossing device, and a conveying structure for conveying heated water is arranged on the outside of the cable crossing device. The petroleum wellhead cable insulation crossing device is characterized in that the guide wheel rotates to assist cable transmission, the piston pump rod is driven to reciprocate in the pump shell, the heated water is conveyed to the annular installation pipe through the conveying pipe and the annular installation pipe, the annular installation pipe is heated and protected, a circulating loop is formed, the heated water flow is automatically adjusted according to the cable moving speed, the formation of condensed water and the deposition of wax are effectively prevented, the safety protection barrier of the wellhead is increased, and the self-adaptive protection effect is good.

Description

Technical Field

[0001] This invention relates to the field of oil and gas extraction technology, specifically to an oil wellhead cable insulation crossing device. Background Technology

[0002] In the process of oil extraction, when there is not enough pressure at the bottom of the well to drive crude oil to form a self-flowing capacity, it is necessary to put an electric submersible pump into the oil layer to work. The electric submersible pump is usually powered by a connecting cable. When connecting the cable, it must pass through the pump wellhead device. To pass through the wellhead, a cable passer must be used to ensure pressure resistance and sealing during the pass.

[0003] Chinese utility model patent CN219554437U discloses an underground cable crossing device, including a fixed frame. A fixed shaft is fixedly connected to the top of the fixed frame. A cable coil is rotatably fitted to the outside of the fixed shaft. A wire is provided outside the cable coil. A threaded sleeve is inserted into one end of the wire. A threaded block is threadedly connected to one end of the threaded sleeve. Support sleeves are fixedly connected to both sides of one end of the fixed frame. A threaded groove is opened in the middle of the top of the support sleeve. A threaded rod is threadedly connected inside the threaded groove. A handwheel is fixedly connected to the top of the threaded rod.

[0004] The above-mentioned patent has the following shortcomings: In low temperature or high humidity environments, condensation is easily formed inside the cable and the cable itself. At the same time, wax deposits inside the well may also block the cable channel, affecting the normal operation of the cable. It cannot adaptively adjust according to the actual moving speed of the cable and the temperature change of the cable body, resulting in poor protection effect or energy waste.

[0005] Therefore, it is urgent to improve the cable insulation crossing device at oil wellheads to solve the aforementioned problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an oil wellhead cable insulation crossing device with advantages such as good adaptive protection. It solves the problems of existing downhole cable crossing devices, which are prone to condensation in low-temperature or high-humidity environments, and the potential blockage of cable channels by wax deposits in the well, affecting the normal operation of the cable. Furthermore, these devices cannot adaptively adjust according to the actual moving speed of the cable and the temperature changes of the crossing device, resulting in poor protection or energy waste.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an oil wellhead cable insulation crossing device, comprising a flange, a cable crossing device disposed on the top of the flange, and a connecting sleeve fixedly connected to the top of the flange, wherein the cable crossing device is fixedly connected to the top of the connecting sleeve, and the cable crossing device is provided with a transmission structure for assisting the transmission of the cable body, and the cable crossing device is provided with a conveying structure for conveying heated water.

[0008] The transmission structure includes a mounting sleeve detachably connected to the outside of the cable passer, a connecting plate fixedly connected to the outside of the mounting sleeve, a fixing frame fixedly connected to the end of the connecting plate away from the mounting sleeve, a transmission shaft extending to the outside of the fixing frame being rotatably connected inside the fixing frame, and a guide wheel fixedly connected to the outside of the transmission shaft.

[0009] The conveying structure includes a pump casing fixedly connected to the outside of the cable passer, a heating water tank disposed outside the cable passer, an annular mounting pipe fixedly installed outside the connecting sleeve, and a transmission gear fixedly installed at the left end of the transmission shaft. A driven gear is rotatably connected to the outside of the fixed frame. A swing rod is hinged to the outside of the driven gear. A connecting rod is hinged to the end of the swing rod away from the driven gear. A piston pump rod is hinged to the end of the connecting rod away from the swing rod.

[0010] Furthermore, the outer diameter of the cable passer is adapted to the inner diameter of the mounting sleeve, the mounting sleeve is fixedly connected to the outside of the cable passer by bolts, the guide wheel is rotatably connected to the outside of the cable passer, and the cable body is kinetically connected to the outside of the guide wheel.

[0011] Furthermore, the transmission gear and the driven gear are meshed with each other, and the swing rod and the connecting rod are both swing-connected to the outside of the driven gear.

[0012] Furthermore, the piston pump rod is slidably connected to the inside of the pump housing and extends to its outside. A water pumping pipe is fixedly connected between the heating water tank and the pump housing. A one-way valve is fixedly installed inside the water pumping pipe. A limiting seat adapted to the piston pump rod is fixedly connected to the outside of the pump housing. The piston pump rod is slidably connected to the inside of the limiting seat.

[0013] Furthermore, there are several annular mounting tubes, which are distributed at equal intervals on the outside of the connecting sleeve. Connecting tubes are fixedly connected between the several annular mounting tubes, and a conveying tube is fixedly connected between the top annular mounting tube and the pump casing.

[0014] Furthermore, a circulation pipe is fixedly connected between the bottom annular mounting pipe and the heating water tank, a heating resistance wire is fixedly installed inside the heating water tank, a water inlet is opened on the outside of the heating water tank, and a sealing plug is detachably installed inside the water inlet.

[0015] Furthermore, a limiting component is provided on the outside of the fixing frame. The limiting component includes a mounting plate fixedly connected to the outside of the fixing frame. A threaded rod extending to the lower surface of the mounting plate is threadedly connected to the upper surface of the mounting plate. A connecting frame is rotatably connected to the bottom end of the threaded rod. A limiting wheel is rotatably connected inside the connecting frame, and the limiting wheel is located on the upper surface of the guide wheel. A knob is fixedly connected to the top end of the threaded rod.

[0016] Furthermore, the connecting frame is externally fixedly connected to a limiting block extending into the interior of the fixed frame, and the interior of the fixed frame is provided with a sliding groove that matches the limiting block, and the limiting block and the sliding groove are slidably connected.

[0017] Furthermore, the end of the cable passer away from the connecting sleeve is bent at a right angle, and the end of the cable passer away from the connecting sleeve is fixedly connected to an inlet nut.

[0018] Furthermore, a number of springs are fixedly connected to the inner wall of the cable passer, and a pointed cone is fixedly connected between the springs.

[0019] Compared with the prior art, the present invention provides an oil wellhead cable insulation crossing device, which has the following beneficial effects:

[0020] 1. This oil wellhead cable insulation crossing device, by setting up a guide wheel to assist cable transmission, significantly reduces cable friction during transmission. The rotation of the drive shaft drives the drive gear to rotate and mesh with the driven gear, causing the driven gear to rotate and drive the swing rod and connecting rod to move. This in turn drives the piston pump rod to slide back and forth inside the pump casing. Heated water is drawn from the heating water tank through the pumping pipe and transported to the inside of the annular installation pipe for heating and protection through the delivery pipe and the annular installation pipe, forming a circulation loop. This automatically adjusts the heating water flow rate according to the cable movement speed, improving the protection effect, reducing energy waste, effectively preventing the formation of condensate and the deposition of wax, and increasing the safety protection barrier at the wellhead, achieving the advantages of good adaptive protection.

[0021] 2. This oil wellhead cable insulation crossing device uses a knob to rotate a threaded rod. The bottom end of the threaded rod drives a limit wheel to move up and down through a connecting frame. The position of the limit wheel can be adjusted according to the cable diameter and transmission status to ensure the stability of the cable during transmission. By setting springs and cones, cables of different diameters can be firmly fixed, increasing the stability of the cable and further improving the protective performance and stability of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an oil wellhead cable insulation crossing device according to the present invention;

[0023] Figure 2 This is a three-dimensional structural view of the limiting component, transmission structure, and conveying structure of an oil wellhead cable insulation crossing device according to the present invention.

[0024] Figure 3 This is a three-dimensional structural view of the transmission structure and conveying structure of an oil wellhead cable insulation crossing device according to the present invention;

[0025] Figure 4 This invention relates to an oil wellhead cable insulation crossing device. Figure 2 A magnified structural diagram of structure A is shown below;

[0026] Figure 5 This is a three-dimensional cross-sectional view of the cable crossing device of an oil wellhead cable insulation crossing device according to the present invention.

[0027] In the diagram: 1. Flange; 2. Cable runner; 3. Connecting sleeve; 4. Inlet nut; 5. Mounting sleeve; 6. Connecting plate; 7. Fixing bracket; 8. Drive shaft; 9. Guide wheel; 10. Pump casing; 11. Heating water tank; 12. Drive gear; 13. Driven gear; 14. Swing rod; 15. Connecting rod; 16. Piston pump rod; 17. Annular mounting pipe; 18. Pumping pipe; 19. Delivery pipe; 20. Circulation pipe; 21. Limit seat; 22. Mounting plate; 23. Threaded rod; 24. Connecting bracket; 25. Limit wheel; 26. Knob; 27. Limit block; 28. Slide groove; 29. ​​Spring; 30. Cone. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1 to 5 This embodiment of an oil wellhead cable insulation crossing device includes a flange 1, a cable crossing device 2 disposed on the top of the flange 1, and a connecting sleeve 3 fixedly connected to the top of the flange 1. The cable crossing device 2 is fixedly connected to the top of the connecting sleeve 3. The cable crossing device 2 is provided with a transmission structure for assisting the transmission of the cable body and a conveying structure for conveying heated water. The transmission structure includes a mounting sleeve 5 detachably connected to the outside of the cable crossing device 2. A connecting plate 6 is fixedly connected to the outside of the mounting sleeve 5. A fixing frame 7 is fixedly connected to the end of the connecting plate 6 away from the mounting sleeve 5. A drive shaft 8 extending to the outside of the fixing frame 7 is rotatably connected inside the fixing frame 7. A guide wheel 9 is fixedly connected to the outside of the drive shaft 8.

[0030] The outer diameter of the cable puller 2 is matched with the inner diameter of the mounting sleeve 5. The mounting sleeve 5 is fixedly connected to the outside of the cable puller 2 by bolts. The guide wheel 9 is rotatably connected to the outside of the cable puller 2. The cable body is driven and connected to the outside of the guide wheel 9.

[0031] Specifically, the end of the cable passer away from the connecting sleeve 3 is bent at a right angle, and the end of the cable passer away from the connecting sleeve 3 is fixedly connected to the inlet nut 4.

[0032] Please see Figures 1 to 5 In this embodiment, the conveying structure includes a pump housing 10 fixedly connected to the outside of the cable passer 2, a heating water tank 11 disposed outside the cable passer 2, an annular mounting pipe 17 fixedly installed outside the connecting sleeve 3, and a transmission gear 12 fixedly installed on the left end of the transmission shaft 8. A driven gear 13 is rotatably connected to the outside of the fixed frame 7. A swing rod 14 is hinged to the outside of the driven gear 13. A connecting rod 15 is hinged to the end of the swing rod 14 away from the driven gear 13. A piston pump rod 16 is hinged to the end of the connecting rod 15 away from the swing rod 14.

[0033] In this configuration, the transmission gear 12 and the driven gear 13 are meshed with each other, and the swing rod 14 and the connecting rod 15 are both swing-connected to the outside of the driven gear 13.

[0034] Specifically, the piston pump rod 16 is slidably connected to the inside of the pump housing 10 and extends to the outside of it. A water pumping pipe 18 is fixedly connected between the heating water tank 11 and the pump housing 10. A one-way valve is fixedly installed inside the water pumping pipe 18. A limiting seat 21 adapted to the piston pump rod 16 is fixedly connected to the outside of the pump housing 10. The piston pump rod 16 is slidably connected to the inside of the limiting seat 21.

[0035] It should be noted that there are several annular mounting pipes 17, which are distributed at equal intervals on the outside of the connecting sleeve 3. Connecting pipes are fixedly connected between the several annular mounting pipes 17, and a conveying pipe 19 is fixedly connected between the top annular mounting pipe 17 and the pump casing 10.

[0036] In addition, a circulation pipe 20 is fixedly connected between the bottom annular mounting pipe 17 and the heating water tank 11. A heating resistance wire is fixedly installed inside the heating water tank 11. A water inlet is opened on the outside of the heating water tank 11. A sealing plug is detachably installed inside the water inlet.

[0037] In this embodiment, the cable body is connected to the outside of the guide wheel 9. The rotation of the guide wheel 9 assists in the movement of the cable, reducing friction during transmission. When the cable moves, the guide wheel 9 drives the transmission gear 12 to rotate via the transmission shaft 8. The rotation of the transmission gear 12 further drives the driven gear 13. The rotation of the driven gear 13 is transmitted to the piston pump rod 16 via the swing rod 14 and the connecting rod 15. The piston pump rod 16 slides inside the pump housing 10, drawing hot water from the heating water tank 11 through the pump pipe 18 and delivering the hot water to the annular mounting pipe 17 through the delivery pipe 19. A one-way valve inside the pump pipe 18 ensures that the hot water can only flow in one direction, preventing backflow. The annular mounting pipes 17 are connected sequentially by connecting pipes. The top annular mounting pipe 17 is connected to the pump housing 10 via the delivery pipe 19, and the bottom annular mounting pipe 17 is connected to the heating water tank 11 via the circulation pipe 20, forming a hot water circulation system. The heating resistance wire inside the heating water tank 11 is used to heat the cooled water, ensuring the continuous operation of the hot water circulation system. The pumping frequency of the piston pump is automatically adjusted according to the moving speed of the cable, thereby controlling the flow of hot water. In this way, the protection effect can be improved and energy waste can be reduced.

[0038] Please see Figures 1 to 5 In this embodiment, a limiting component is provided on the outside of the fixing frame 7. The limiting component includes a mounting plate 22 fixedly connected to the outside of the fixing frame 7. A threaded rod 23 extending to its lower surface is threadedly connected to the upper surface of the mounting plate 22. A connecting frame 24 is rotatably connected to the bottom end of the threaded rod 23. A limiting wheel 25 is rotatably connected inside the connecting frame 24, and the limiting wheel 25 is located on the upper surface of the guide wheel 9. A knob 26 is fixedly connected to the top end of the threaded rod 23.

[0039] The connecting frame 24 is externally fixedly connected to a limiting block 27 extending into the interior of the fixed frame 7. The interior of the fixed frame 7 is provided with a sliding groove 28 that is adapted to the limiting block 27. The limiting block 27 and the sliding groove 28 are slidably connected.

[0040] Please see Figure 1 and Figure 5 In this embodiment, a number of springs 29 are fixedly connected to the inner wall of the cable passer 2, and a pointed cone 30 is fixedly connected between the springs 29.

[0041] In this embodiment, when the threaded rod 23 is rotated by the knob 26, the bottom end of the threaded rod 23 drives the limit wheel 25 to move up and down through the connecting frame 24. The position of the limit wheel 25 can be adjusted according to the diameter of the cable and the transmission status to ensure the stability of the cable during transmission.

[0042] The working principle of the above embodiments is as follows:

[0043] In use, the threaded rod 23 is raised or lowered by manually rotating the knob 26, thereby adjusting the height of the connecting frame 24 and the limiting wheel 25 to limit the vertical position of the cable. The right-angle bend of the cable passer 2 and the design of the inlet nut 4 facilitate the introduction and fixation of the cable. The cable moves on the guide wheel 9, which drives the drive shaft 8 to rotate. The rotation of the drive shaft 8 drives the drive gear 12 to rotate. The drive gear 12 meshes with the driven gear 13, causing the driven gear 13 to rotate, which in turn drives the swing rod 14 to swing. The swing rod 14 drives the connecting rod 15 to move. The connecting rod 15 drives the piston pump rod 16 to slide back and forth inside the pump housing 10. Heated water is drawn from the heating water tank 11 through the water pumping pipe 18 and transported to the outside of the cable passer 2 through the delivery pipe 19 and the annular mounting pipe 17. The annular mounting pipe 17 at the bottom is connected to the heating water tank 11 through the circulation pipe 20 to form a hot water circulation system. This system realizes the assistance of cable transmission, the delivery and circulation of heated water, the limitation of the cable, and the improvement of overall performance. It is suitable for oil extraction operations in various low temperature or high humidity environments.

[0044] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. Any method that can achieve its beneficial effect can be implemented. In addition, the electrical components in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can control the electrical components through simple programming. Moreover, the existing disclosed power connection technology is also common knowledge in the field. Therefore, the specific structural composition and working principle will not be described in detail in this embodiment.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cable insulation crossing device for oil wellheads, characterized in that: Includes a flange (1), a cable passer (2) disposed on the top of the flange (1), and a connecting sleeve (3) fixedly connected to the top of the flange (1). The cable passer (2) is fixedly connected to the top of the connecting sleeve (3). The cable passer (2) is provided with a transmission structure for assisting the transmission of the cable body, and the cable passer (2) is provided with a conveying structure for conveying heated water. The transmission structure includes a mounting sleeve (5) detachably connected to the outside of the cable passer (2), a connecting plate (6) fixedly connected to the outside of the mounting sleeve (5), a fixing frame (7) fixedly connected to the end of the connecting plate (6) away from the mounting sleeve (5), a transmission shaft (8) extending to the outside of the fixing frame (7) rotatably connected inside the fixing frame (7), and a guide wheel (9) fixedly connected to the outside of the transmission shaft (8). The conveying structure includes a pump casing (10) fixedly connected to the outside of the cable passer (2), a heating water tank (11) disposed outside the cable passer (2), an annular mounting pipe (17) fixedly installed outside the connecting sleeve (3), and a transmission gear (12) fixedly installed on the left end of the transmission shaft (8). A driven gear (13) is rotatably connected to the outside of the fixed frame (7). A swing rod (14) is hinged to the outside of the driven gear (13). A connecting rod (15) is hinged to the end of the swing rod (14) away from the driven gear (13). A piston pump rod (16) is hinged to the end of the connecting rod (15) away from the swing rod (14).

2. The oil wellhead cable insulation crossing device according to claim 1, characterized in that: The outer diameter of the cable passer (2) is adapted to the inner diameter of the mounting sleeve (5). The mounting sleeve (5) is fixedly connected to the outside of the cable passer (2) by bolts. The guide wheel (9) is rotatably connected to the outside of the cable passer (2). The cable body is drivenly connected to the outside of the guide wheel (9).

3. The oil wellhead cable insulation crossing device according to claim 1, characterized in that: The transmission gear (12) and the driven gear (13) are meshed with each other, and the swing rod (14) and the connecting rod (15) are both swing-connected to the outside of the driven gear (13).

4. The oil wellhead cable insulation crossing device according to claim 1, characterized in that: The piston pump rod (16) is slidably connected to the inside of the pump housing (10) and extends to the outside of it. The heating water tank (11) and the pump housing (10) are fixedly connected by a water pump pipe (18). A one-way valve is fixedly installed inside the water pump pipe (18). A limiting seat (21) adapted to the piston pump rod (16) is fixedly connected to the outside of the pump housing (10). The piston pump rod (16) is slidably connected to the inside of the limiting seat (21).

5. The oil wellhead cable insulation crossing device according to claim 1, characterized in that: The number of the annular mounting pipes (17) is several, and the several annular mounting pipes (17) are distributed at equal intervals on the outside of the connecting sleeve (3). The several annular mounting pipes (17) are connected to each other by a connecting pipe. The top annular mounting pipe (17) is connected to the pump casing (10) by a conveying pipe (19).

6. The oil wellhead cable insulation crossing device according to claim 5, characterized in that: A circulation pipe (20) is fixedly connected between the bottom annular mounting pipe (17) and the heating water tank (11). A heating resistance wire is fixedly installed inside the heating water tank (11). A water inlet is opened on the outside of the heating water tank (11). A sealing plug is detachably installed inside the water inlet.

7. The oil wellhead cable insulation crossing device according to claim 1, characterized in that: The fixed frame (7) is provided with a limiting component on its exterior. The limiting component includes a mounting plate (22) fixedly connected to the exterior of the fixed frame (7). The upper surface of the mounting plate (22) is threadedly connected to a threaded rod (23) extending to its lower surface. The bottom end of the threaded rod (23) is rotatably connected to a connecting frame (24). The interior of the connecting frame (24) is rotatably connected to a limiting wheel (25), and the limiting wheel (25) is located on the upper surface of the guide wheel (9). The top end of the threaded rod (23) is fixedly connected to a knob (26).

8. The oil wellhead cable insulation crossing device according to claim 7, characterized in that: The connecting frame (24) is externally fixedly connected to a limiting block (27) extending into the interior of the fixing frame (7). The interior of the fixing frame (7) is provided with a sliding groove (28) that is adapted to the limiting block (27). The limiting block (27) and the sliding groove (28) are slidably connected.

9. The oil wellhead cable insulation crossing device according to claim 1, characterized in that: The cable passer (2) is bent at a right angle at the end away from the connecting sleeve (3), and the end of the cable passer (2) away from the connecting sleeve (3) is fixedly connected to the inlet nut (4).

10. The oil wellhead cable insulation crossing device according to claim 1, characterized in that: The inner wall of the cable passer (2) is fixedly connected with a number of springs (29), and a pointed cone (30) is fixedly connected between the springs (29).

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