Gas channeling prevention equipment for gas drive oil production wellhead

Abstract

This utility model provides a gas-driven oil wellhead anti-gas-channeling device, including an oil wellhead and further comprising: a first pipe fixedly connected to the oil wellhead via a flange, a second pipe fixedly connected to the side wall of the first pipe, and a third pipe fixedly connected to the side wall of the second pipe. When the first solenoid valve malfunctions, the second solenoid valve opens, allowing gas to be transported through the third vent pipe to a collection point for collection. This facilitates effective automatic gas channeling prevention at the oil wellhead even when the first solenoid valve malfunctions. This application provides two gas release pipes, namely the second and third vent pipes. When the first solenoid valve malfunctions and cannot release pressure, the second solenoid valve can be opened promptly for pressure release, providing double pressure relief protection at the oil inlet and further preventing accidents.

Description

Technical Field

[0001] This utility model relates to the field of gas channeling prevention technology at oil wellheads, and in particular to gas channeling prevention equipment at gas-driven oil wellheads. Background Technology

[0002] During oil extraction, injecting gas increases reservoir pressure, promotes crude oil flow, and also helps to promote groundwater flow, thus improving oil recovery and water drive performance. Gas drive technology can reduce crude oil viscosity, decrease capillary forces around the well, and promote the flow of crude oil and groundwater, thereby improving water treatment efficiency. During gas drive deoiling, depressurization is usually required. Because gas leakage at the wellhead can cause internal pressure build-up in the pipeline, anti-gas leakage devices are typically installed at the wellhead to prevent operators from manually depressurizing the overpressured wellhead.

[0003] In the existing Chinese utility model publication CN219034673U, a carbon dioxide-driven oil wellhead gas channeling prevention device is disclosed. The device includes an oil wellhead, a first pipe fixedly connected to the top of the wellhead, a second pipe fixedly connected to the outside of the first pipe, a connecting pipe fixedly connected to the top of the second pipe, a groove inside the connecting pipe, a sliding plate slidably connected inside the groove, a connecting rod fixedly connected to the bottom of the sliding plate, a pressure sensor fixedly connected to the top of the groove, a baffle fixedly connected to the bottom of the connecting rod extending to the outside of the groove, the bottom of the baffle fitting against the bottom of the connecting pipe, a spring sleeved on the outside of the connecting rod above the baffle, and a third pipe fixedly connected to the outside of the connecting pipe, away from the first pipe. The beneficial effect of this utility model is that by controlling the opening of the solenoid valve through a controller, the automatic release operation of gas channeling at the oil wellhead can be better completed, ensuring the safety of operators while reducing the labor intensity.

[0004] Referring to the aforementioned carbon dioxide-driven oil wellhead gas channeling prevention device, this device can only release gas through a third pipeline during venting operations. If the solenoid valve on the third pipeline malfunctions and cannot open properly, gas cannot be released, preventing timely pressure relief and potentially causing an accident. Therefore, how to ensure effective automatic gas channeling prevention at the oil wellhead even when a solenoid valve malfunctions is a crucial issue that needs to be addressed in the design of gas-driven oil wellhead gas channeling prevention equipment. Utility Model Content

[0005] This invention provides a gas-proof device for preventing gas leakage at the wellhead of a gas-driven oil well to solve the problem of solenoid valves failing to perform pressure relief operations in a timely manner.

[0006] This utility model solves the above-mentioned technical problems through the following technical solutions:

[0007] This utility model provides a gas-driven oil wellhead anti-gas channeling device, including an oil wellhead, and further comprising: a first pipe fixedly connected to the oil wellhead via a flange, a second pipe fixedly connected to the side wall of the first pipe, and a third pipe fixedly connected to the side wall of the second pipe.

[0008] A pressing structure is provided at the top of pipe three;

[0009] A sealing structure is provided below a pressing structure, which opens synchronously when the pressing structure rises.

[0010] Preferably, a fixed pipe and a vent pipe one are fixedly connected to the side wall of the third pipe, a vent pipe two and a vent pipe three are fixedly connected to the side wall of the first vent pipe, a solenoid valve one is fixedly installed on the side wall of the second vent pipe, and a solenoid valve two is fixedly installed on the side wall of the third vent pipe.

[0011] In this technical solution, solenoid valve one blocks vent pipe two, and solenoid valve two blocks vent pipe three.

[0012] Preferably, a pressure sensor 1 is fixedly connected to the inner wall of the top of the pipe 3, a pressure sensor 2 is fixedly connected to the inner wall of the fixed pipe, and a sealing plate 3 is fixedly connected to the side wall of the pressure sensor 2.

[0013] In this technical solution, the sealing plate three is pushed, and the pressure of the sealing plate three is transmitted to the pressure sensor two.

[0014] Preferably, controller one, controller two and wireless signal transmitter are fixedly connected to the front side wall of the pipeline three. Controller one is electrically connected to pressure sensor one, solenoid valve one and wireless signal transmitter, and controller two is electrically connected to pressure sensor two, solenoid valve two and wireless signal transmitter.

[0015] In this technical solution, the signal from pressure sensor one is transmitted to controller one, controller one controls the wireless signal transmitter to transmit the signal to the remote receiving terminal, the monitoring personnel receive the signal, and control solenoid valve one to open through controller one; the signal from pressure sensor two is transmitted to controller two, controller two controls the wireless signal transmitter to transmit the signal to the remote receiving terminal, the monitoring personnel receive the signal, and control solenoid valve two to open through controller two.

[0016] Preferably, one end of pipe 1, pipe 2, pipe 3, fixed pipe and vent pipe 1 is open, and the other end of pipe 1, pipe 2, pipe 3, fixed pipe and vent pipe 1 is closed.

[0017] Preferably, the pressing structure includes a fixed sleeve, a spring, a sliding rod, a fixed block, a connecting rod, and a sealing plate. The fixed sleeve is fixedly connected to the side wall of the pressure sensor. The sliding rod is slidably connected inside the fixed sleeve. A spring is fixedly connected between the sliding rod and the inner side wall of the fixed sleeve. The bottom of the sliding rod is fixedly connected to the sealing plate. Two connecting rods are fixedly connected to the top side wall of the sealing plate. The fixed block is fixedly connected to the inner side walls on both sides of the pipe. The connecting rod is slidably connected to the side wall of the fixed block.

[0018] In this technical solution, the continuous increase of gas in pipeline 1 will push the sealing plate 1 to move upward. The sealing plate body will drive the sliding rod 1, connecting rod 1 and fixed rod to move upward. The sliding rod 1 slides upward in the fixed sleeve and squeezes the spring 1. The elastic force generated by the compressed spring 1 pushes the fixed sleeve in the opposite direction. The fixed sleeve transmits the pressure to the pressure sensor 1.

[0019] Preferably, the size of the sealing plate is consistent with the size of the inner wall of the pipe.

[0020] Preferably, a fixing bracket is fixedly connected to the inner wall of the third pipe.

[0021] Preferably, the sealing structure includes a second sealing plate, a connecting block, a second fixing block, and a second connecting rod. The connecting block is fixedly connected to the top inner side wall of the fixing frame. The second sealing plate is rotatably connected between the connecting blocks. The second sealing plate seals the end of the fixing pipe. The second fixing block is fixedly connected to the side wall of the second sealing plate. The second connecting rod is rotatably connected between the second fixing blocks.

[0022] In this technical solution, the connecting rod 2 pulls the sealing plate 2 to rotate, causing the end of the fixed tube to open, and gas rushes into the fixed tube, pushing the sealing plate 3.

[0023] Preferably, the sealing structure includes a fixed rod, a second sliding rod, a second spring, a third fixed block, and a sliding groove. The fixed rod is fixedly connected to the bottom side wall of the sealing plate. A sliding groove is formed in the side wall of the fixed rod, and the second sliding rod is slidably connected in the sliding groove. The second sliding rod is slidably connected to the side wall of the fixed frame. The bottom of the second sliding rod is rotatably connected to the other end of the second connecting rod. Two third fixed blocks are fixedly connected to the side wall of the second sliding rod, and a second spring is fixedly connected between the third fixed block and the fixed frame.

[0024] In this technical solution, the sealing plate 1 rises, causing the fixed rod to move upward. The fixed rod then slides upward along the sliding rod 2. When the bottom of the sliding rod 2 contacts the bottom of the sliding groove inside the fixed rod, the fixed rod, as it continues to rise with the sealing plate 1, will cause the sliding rod 2 to rise. The sliding rod 2 then causes the fixed block 3 and the connecting rod 2 to rise, and the spring 2 is compressed.

[0025] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0026] The positive and progressive effects of this utility model are as follows:

[0027] 1. When the solenoid valve 1 malfunctions, the gas cannot be discharged and will continue to accumulate in pipe 3, pushing the sealing plate 1 to continue rising. As the sealing plate 1 rises, the fixing rod pulls the sealing plate 2 to rotate, causing the end of the fixing pipe to open. Gas rushes into the fixing pipe, pushing the sealing plate 3. The pressure of the sealing plate 3 is transmitted to the pressure sensor 2. The signal from the pressure sensor 2 is transmitted to the controller 2. The controller 2 controls the wireless signal transmitter to transmit the signal to the remote receiving terminal. The monitoring personnel receive the signal and control the solenoid valve 2 to open through the controller 2, allowing the gas to be transported through the vent pipe 3 to the collection point for collection. This facilitates the automatic release of gas leakage at the oil wellhead even when the solenoid valve 1 malfunctions.

[0028] 2. This application provides two gas venting pipes, namely vent pipe two and vent pipe three. When solenoid valve one malfunctions and cannot vent, solenoid valve two can be opened in time to vent, so that the oil inlet has double pressure relief protection, thereby further preventing accidents from occurring. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0030] Figure 2 This is a schematic diagram of the overall internal structure of this utility model.

[0031] Figure 3 The whole of this utility model Figure 2 A magnified schematic diagram of the structure at point A.

[0032] Explanation of reference numerals in the attached figures

[0033] 1. Oil wellhead; 2. Pipeline 1; 3. Pipeline 2; 4. Pipeline 3; 5. Controller 1; 6. Controller 2; 7. Wireless signal transmitter; 8. Fixed pipe; 9. Vent pipe 1; 10. Vent pipe 2; 11. Solenoid valve 1; 12. Vent pipe 3; 13. Solenoid valve 2; 14. Pressurized structure; 1401. Fixed sleeve; 1402. Spring 1; 1403. Sliding rod 1; 1404. Fixed block 1; 140 5. Connecting rod one; 1406. Sealing plate one; 15. Pressure sensor one; 16. Pressure sensor two; 17. Sealing structure; 1701. Sealing plate two; 1702. Connecting block; 1703. Fixing block two; 1704. Connecting rod two; 1711. Fixing rod; 1712. Sliding rod two; 1713. Spring two; 1714. Fixing block three; 1715. Sliding groove; 18. Fixing frame; 19. Sealing plate three. Detailed Implementation

[0034] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments described herein.

[0035] like Figure 1-3 As shown, the gas-driven oil wellhead anti-gas channeling device includes an oil wellhead 1, and also includes: the oil wellhead 1 is fixedly connected to a first pipe 2 via a flange, the side wall of the first pipe 2 is fixedly connected to a second pipe 3, and the side wall of the second pipe 3 is fixedly connected to a third pipe 4.

[0036] A pressing structure 14 is provided at the top of the pipe 3 4;

[0037] A sealing structure 17 is disposed below the pressing structure 14. When the pressing structure 14 rises, it simultaneously drives the sealing structure 17 to open.

[0038] A fixed pipe 8 and a vent pipe 9 are fixedly connected to the side wall of the pipe 3 4. A vent pipe 2 10 and a vent pipe 3 12 are fixedly connected to the side wall of the vent pipe 1 9. A solenoid valve 11 is fixedly installed on the side wall of the vent pipe 2 10. A solenoid valve 2 13 is fixedly installed on the side wall of the vent pipe 3 12.

[0039] Solenoid valve 11 blocks vent pipe 20, and solenoid valve 23 blocks vent pipe 32.

[0040] A pressure sensor 15 is fixedly connected to the inner wall of the top of the pipe 3 4, a pressure sensor 2 16 is fixedly connected to the inner wall of the fixed pipe 8, and a sealing plate 3 19 is fixedly connected to the side wall of the pressure sensor 2 16.

[0041] When the sealing plate 319 is pushed, the pressure of the sealing plate 319 will be transmitted to the pressure sensor 216.

[0042] Controller 1 5, Controller 2 6 and Wireless Signal Transmitter 7 are fixedly connected to the front side wall of Pipe 3 4. Controller 1 5 is electrically connected to Pressure Sensor 15, Solenoid Valve 11 and Wireless Signal Transmitter 7. Controller 2 6 is electrically connected to Pressure Sensor 2 16, Solenoid Valve 2 13 and Wireless Signal Transmitter 7.

[0043] The signal from pressure sensor 15 is transmitted to controller 5. Controller 5 controls wireless signal transmitter 7 to transmit the signal to a remote receiving terminal. The monitoring personnel receive the signal and control solenoid valve 11 to open via controller 5. The signal from pressure sensor 16 is transmitted to controller 6. Controller 6 controls wireless signal transmitter 7 to transmit the signal to a remote receiving terminal. The monitoring personnel receive the signal and control solenoid valve 13 to open via controller 6.

[0044] One end of each of the pipes 1-2, 2-3, 3-4, 8-fixed pipe, and 9-ventilation pipe is open, while the other end of each of the pipes 1-2, 2-3, 3-4, 8-fixed pipe, and 9-ventilation pipe is closed.

[0045] The pressure structure 14 includes a fixed sleeve 1401, a spring 1402, a sliding rod 1403, a fixed block 1404, a connecting rod 1405, and a sealing plate 1406. The fixed sleeve 1401 is fixedly connected to the side wall of the pressure sensor 15. The sliding rod 1403 is slidably connected inside the fixed sleeve 1401. The spring 1402 is fixedly connected between the sliding rod 1403 and the inner side wall of the fixed sleeve 1401. The sealing plate 1406 is fixedly connected to the bottom of the sliding rod 1403. Two connecting rods 1405 are fixedly connected to the top side wall of the sealing plate 1406. The fixed block 1404 is fixedly connected to the inner side walls on both sides of the pipe 4. The connecting rod 1405 is slidably connected to the side wall of the fixed block 1404.

[0046] As the gas in pipe 12 continues to increase, it will push the sealing plate 1406 upward. The sealing plate will drive the sliding rod 1403, the connecting rod 1405 and the fixing rod 1711 to move upward. The sliding rod 1403 slides upward in the fixing sleeve 1401, compressing the spring 1402. The elastic force generated by the compressed spring 1402 pushes the fixing sleeve 1401 in the opposite direction. The fixing sleeve 1401 transmits the pressure to the pressure sensor 15.

[0047] The size of the sealing plate 1406 is consistent with the size of the inner wall of pipe 4.

[0048] A fixing bracket 18 is fixedly connected to the inner wall of the pipe 3 4.

[0049] The sealing structure 17 includes a second sealing plate 1701, a connecting block 1702, a second fixing block 1703, and a second connecting rod 1704. The connecting block 1702 is fixedly connected to the inner top wall of the fixing frame 18. The second sealing plate 1701 is rotatably connected between the connecting blocks 1702. The second sealing plate 1701 seals the end of the fixing pipe 8. The second fixing block 1703 is fixedly connected to the side wall of the second sealing plate 1701. The second connecting rod 1704 is rotatably connected between the second fixing blocks 1703.

[0050] The connecting rod 1704 pulls the sealing plate 1701 to rotate, causing the end of the fixed tube 8 to open, and gas rushes into the fixed tube 8, pushing the sealing plate 19.

[0051] The sealing structure 17 includes a fixed rod 1711, a sliding rod 1712, a spring 1713, a fixing block 1714, and a sliding groove 1715. The fixed rod 1711 is fixedly connected to the bottom side wall of the sealing plate. The sliding groove 1715 is provided in the side wall of the fixed rod 1711. The sliding rod 1712 is slidably connected in the sliding groove 1715. The sliding rod 1712 is slidably connected to the side wall of the fixing frame 18. The bottom of the sliding rod 1712 is rotatably connected to the other end of the connecting rod 1704. Two fixing blocks 1714 are fixedly connected to the side wall of the sliding rod 1712. The spring 1713 is fixedly connected between the fixing block 1714 and the fixing frame 18.

[0052] As the sealing plate 1406 rises, it causes the fixing rod 1711 to move upward. The fixing rod 1711 then slides upward along the sliding rod 1712. When the bottom of the sliding rod 1712 contacts the bottom of the sliding groove 1715 inside the fixing rod 1711, the fixing rod 1711 will drive the sliding rod 1712 to rise as the sealing plate 1406 continues to rise. The sliding rod 1712 will drive the fixing block 1714 and the connecting rod 1704 to rise, and the spring 1713 will be compressed.

[0053] In use, all electrical components mentioned in this application are connected to an external power supply and control switch. When there is gas leakage inside the wellhead 1, the gas enters the pipeline 2. The continuous increase of gas in the pipeline 2 will push the sealing plate 1406 to move upward. The sealing plate 1406 drives the sliding rod 1403, the connecting rod 1405 and the fixing rod 1711 to move upward. The sliding rod 1403 slides upward in the fixing sleeve 1401 and squeezes the spring 1402. The elastic force generated by the compressed spring 1402 pushes the fixing sleeve 1401 in the opposite direction. The fixing sleeve 1401 transmits the pressure to the pressure sensor 15, while the fixing rod 1711 slides upward along the sliding rod 1712.

[0054] When the bottom of sliding rod 1712 just contacts the bottom of sliding groove 1715 inside fixed rod 1711, the pressure sensor 15 is subjected to pressure exceeding the set value. The signal from pressure sensor 15 is transmitted to controller 5. Controller 5 controls wireless signal transmitter 7 to transmit the signal to remote receiving terminal. The monitoring personnel receive the signal and control solenoid valve 11 to open through controller 5. The gas is transported to the collection point through vent pipe 10 for collection, thereby completing the automatic release operation of gas leakage at wellhead 1.

[0055] If the solenoid valve 11 malfunctions and fails to open, the gas cannot be discharged and will continue to accumulate in the pipe 4, pushing the sealing plate 1406 to continue rising. Since the bottom of the sliding rod 1712 has already contacted the bottom of the sliding groove 1715 in the fixed rod 1711, the fixed rod 1711 will drive the sliding rod 1712 to rise as the sealing plate 1406 continues to rise. The sliding rod 1712 will drive the fixed block 1714 and the connecting rod 1704 to rise, the spring 1713 will be compressed, and the connecting rod 1704 will pull the sealing plate 1701 to rotate, causing the end of the fixed pipe 8 to open, and the gas will rush into the fixed pipe 8, pushing the sealing plate 19. The pressure of the sealing plate 19 is transmitted to the pressure sensor 16.

[0056] The signal from pressure sensor 216 is transmitted to controller 26. Controller 26 controls wireless signal transmitter 7 to transmit the signal to remote receiving terminal. The monitoring personnel receive the signal and control solenoid valve 213 to open through controller 26, so that the gas is transported to the recovery point through vent pipe 312 for collection. This facilitates the automatic release of gas leakage at the wellhead 1 even if solenoid valve 11 fails.

[0057] This utility model is not limited to the above-described embodiments. Any changes in its shape or structure fall within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A gas channeling prevention device for gas-lift oil production wellhead, comprising an oil production wellhead (1), characterized in that, Also includes: The wellhead (1) is fixedly connected to pipe one (2) via a flange. Pipe two (3) is fixedly connected to the side wall of pipe one (2). Pipe three (4) is fixedly connected to the side wall of pipe two (3). A pressure structure (14) is provided at the top of the pipe three (4); A sealing structure (17) is provided below a pressing structure (14). The pressing structure (14) rises and simultaneously drives the sealing structure (17) to open.

2. The gas channeling prevention device at the gas-driven oil wellhead as described in claim 1, characterized in that: A fixed pipe (8) and a vent pipe (9) are fixedly connected to the side wall of the third pipe (4). A vent pipe (2) and a vent pipe (3) are fixedly connected to the side wall of the first vent pipe (9). A solenoid valve (11) is fixedly installed on the side wall of the second vent pipe (10). A solenoid valve (2) is fixedly installed on the side wall of the third vent pipe (12).

3. The gas channeling prevention device at the gas-driven oil wellhead as described in claim 2, characterized in that: Pressure sensor 1 (15) is fixedly connected to the inner wall of the top of the pipe 3 (4), pressure sensor 2 (16) is fixedly connected to the inner wall of the fixed pipe (8), and sealing plate 3 (19) is fixedly connected to the side wall of pressure sensor 2 (16).

4. The gas channeling prevention device at the gas-driven oil wellhead as described in claim 1, characterized in that: The front side wall of the pipe three (4) is fixedly connected to controller one (5), controller two (6) and wireless signal transmitter (7). Controller one (5) is electrically connected to pressure sensor one (15), solenoid valve one (11) and wireless signal transmitter (7). Controller two (6) is electrically connected to pressure sensor two (16), solenoid valve two (13) and wireless signal transmitter (7).

5. The gas channeling prevention device at the gas-driven oil wellhead as described in claim 1, characterized in that: One end of the first pipe (2), the second pipe (3), the third pipe (4), the fixed pipe (8) and the first vent pipe (9) are open, and the other end of the first pipe (2), the second pipe (3), the third pipe (4), the fixed pipe (8) and the first vent pipe (9) are closed.

6. The gas channeling prevention device at the gas-driven oil wellhead as described in claim 1, characterized in that: The pressure structure (14) includes a fixed sleeve (1401), a spring (1402), a sliding rod (1403), a fixing block (1404), a connecting rod (1405), and a sealing plate (1406). The fixed sleeve (1401) is fixedly connected to the side wall of the pressure sensor (15). The sliding rod (1403) is slidably connected inside the fixed sleeve (1401). The sliding rod (1403) and the fixed sleeve A spring (1402) is fixedly connected between the inner walls of (1401). A sealing plate (1406) is fixedly connected to the bottom of the sliding rod (1403). Two connecting rods (1405) are fixedly connected to the top side wall of the sealing plate (1406). A fixing block (1404) is fixedly connected to the inner walls on both sides of the pipe (4). The connecting rod (1405) is slidably connected to the side wall of the fixing block (1404).

7. The gas channeling prevention device at the gas-driven oil wellhead as described in claim 6, characterized in that: The size of the sealing plate one (1406) is consistent with the size of the inner wall of pipe three (4).

8. The gas channeling prevention device at the gas-driven oil wellhead as described in claim 1, characterized in that: A fixing bracket (18) is fixedly connected to the inner wall of the pipe three (4).

9. The gas channeling prevention device at the gas-driven oil wellhead as described in claim 1, characterized in that: The sealing structure (17) includes a second sealing plate (1701), a connecting block (1702), a second fixing block (1703), and a second connecting rod (1704). The connecting block (1702) is fixedly connected to the top inner side wall of the fixing frame (18). The second sealing plate (1701) is rotatably connected between the connecting blocks (1702). The second sealing plate (1701) seals the end of the fixing pipe (8). The second fixing block (1703) is fixedly connected to the side wall of the second sealing plate (1701). The second connecting rod (1704) is rotatably connected between the second fixing blocks (1703).

10. The gas channeling prevention device at the gas-driven oil wellhead as described in claim 9, characterized in that: The sealing structure (17) includes a fixed rod (1711), a sliding rod two (1712), a spring two (1713), a fixed block three (1714), and a sliding groove (1715). The fixed rod (1711) is fixedly connected to the bottom side wall of the sealing plate. A sliding groove (1715) is provided in the side wall of the fixed rod (1711). The sliding rod two (1712) is slidably connected in the sliding groove (1715). The sliding rod two (1712) is slidably connected to the side wall of the fixed frame (18). The bottom of the sliding rod two (1712) is rotatably connected to the other end of the connecting rod two (1704). Two fixed blocks three (1714) are fixedly connected to the side wall of the sliding rod two (1712). A spring two (1713) is fixedly connected between the fixed block three (1714) and the fixed frame (18).

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