Coal seam gas extraction and water injection one-hole multi-purpose wellhead device and control method

Abstract

The invention discloses a coal seam gas extraction and water injection one-hole multipurpose wellhead device and a control method. The device comprises an outer frame body and an inner frame, a placing eave is fixedly mounted at the top of the outer frame body, a mounting groove is formed in the top of the placing eave, supporting rings are fixedly mounted on the two sides of an inner cavity of the mounting groove, and a mounting plate is fixedly mounted at the bottom of the inner frame; when the intelligent control valve arranged on the outer side of the gas pumping pipe is opened, the intelligent control valve arranged on the outer side of the water injection pipe is closed, external gas extraction equipment can extract gas in a coal seam through the gas pumping pipe, and when the intelligent control valve arranged on the outer side of the water injection pipe is opened, the intelligent control valve arranged on the outer side of the gas pumping pipe is closed; external water injection equipment can inject water into the coal seam, the function that one hole has multiple purposes can be achieved, gas in the coal seam can be effectively extracted, water injection operation can be conducted on the coal seam, meanwhile, the pressure and the gas concentration in the coal seam can be monitored in real time, and a powerful guarantee is provided for safe mining of the coal seam.

Description

Technical Field

[0001] This invention relates to the field of coal mining technology, specifically to a multi-purpose wellhead device and control method for coal seam gas extraction and water injection. Background Technology

[0002] In coal mining, coalbed methane and coal dust are two major safety hazards. Gas explosions and coal dust explosions not only cause serious casualties but also lead to enormous property damage, severely hindering safe and efficient coal mine production. Coalbed methane drainage technology effectively prevents gas explosions by pre-extracting methane from the coal seam, reducing its content and pressure. Simultaneously, coalbed water injection technology pre-wets the coal seam with pressurized water, reducing coal dust generation and decreasing the probability of rockbursts, coal and gas outbursts, and spontaneous combustion. Therefore, coalbed methane drainage and water injection technologies are indispensable and crucial links in ensuring safe coal mine production.

[0003] In traditional coal mine production, gas drainage boreholes and coal seam water injection boreholes are usually constructed separately. This means that in the same coal seam area, gas drainage boreholes and water injection boreholes need to be constructed separately, which not only increases the number of boreholes but also extends the construction period. This repetitive construction not only leads to frequent equipment movement and adjustments, increasing equipment wear and maintenance costs, but also significantly increases the labor intensity of workers and reduces work efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-purpose wellhead device and control method for coal seam gas extraction and water injection, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-purpose wellhead device for coal seam gas extraction and water injection, comprising an outer frame and an inner frame. A placement eave is fixedly installed on the top of the outer frame, and an installation groove is formed on the top of the placement eave. Support rings are fixedly installed on both sides of the inner cavity of the installation groove. An installation plate is fixedly installed on the bottom of the inner frame. An installation pipe is fixedly installed inside the installation plate via bearings. A pressure sensor and a gas concentration detector are installed at the bottom end of the installation pipe. A control box is fixedly installed on the top of the installation pipe. A gas extraction pipe and a water injection pipe are fixedly installed inside the installation pipe and the control box. Intelligent control valves are fixedly installed on the outside of both the gas extraction pipe and the water injection pipe. A control box is fixedly installed inside the control box, and a junction box is fixedly installed on the outside of the control box. An installation ring is fixedly installed on the top of the inner frame, and a drive assembly is installed on the top of the installation ring. A sealing and locking assembly is installed inside the inner frame.

[0006] Preferably, the inner frame is movably installed inside the outer frame, and a snap-fit ​​ring is fixedly installed at the bottom of the mounting ring, and the snap-fit ​​ring is snap-fitted inside the mounting groove.

[0007] Preferably, the drive assembly includes a servo motor and a rotating ring. A bevel gear is fixedly mounted on the output end of the servo motor, and a bevel tooth arc is fixedly mounted on the top of the rotating ring. The outer side of the bevel gear meshes with the outer side of the bevel tooth arc. A connecting block is fixedly mounted on one side of the bevel tooth arc, and a connecting rod is fixedly mounted on the bottom of the connecting block. A fixing plate is fixedly mounted on the bottom of the servo motor, and one side of the fixing plate is fixedly mounted on one side of the mounting ring.

[0008] Preferably, the sealing and locking assembly includes a sealing assembly and a locking assembly. The sealing assembly includes a sealing disc, the sealing disc having a second through groove inside. The sealing disc is rotatably mounted inside the top of the mounting plate, and the mounting plate has a first through groove inside.

[0009] Preferably, the specifications of the first through groove and the second through groove are the same, and the positions of the first through groove and the second through groove correspond to each other. The end of the connecting rod away from the connecting block is fixedly connected to the top of the sealing plate.

[0010] Preferably, a limiting plate is fixedly installed inside the inner frame, and the bottom of the limiting plate is in contact with the top of the sealing plate.

[0011] Preferably, the locking assembly includes three arc-shaped blocks, each with a water injection pipe inside one side, an arc-shaped slider fixedly installed inside each arc-shaped groove, and a locking rod fixedly installed at one end of each arc-shaped slider.

[0012] Preferably, a sleeve ring is fixedly installed on the outer side of the outer frame, and rectangular grooves are opened inside the outer frame, the sleeve ring and the inner frame. The end of the locking rod away from the arc-shaped slider is slidably inserted into the inside of the rectangular groove.

[0013] Preferably, a fixing pin is movably installed inside the mounting slot, and an anti-detachment block is fixedly installed on the top of each fixing pin.

[0014] A control method for a multi-purpose wellhead device for coal seam gas extraction and water injection includes the following steps: S1: First, connect the gas extraction pipe to the external gas extraction equipment and the water injection pipe to the external water injection equipment. Then, connect the pipe to the remote control equipment through the junction box. The pressure sensor and gas concentration detector at the bottom of the pipe can detect the pressure and gas concentration in the coal seam. The detection results can be transmitted to the control box and then to the remote control equipment through the junction box. The remote control equipment can control the intelligent control valves on the outside of the gas extraction pipe and the water injection pipe based on the pressure and gas concentration data.

[0015] S2: When the intelligent control valve on the outside of the gas extraction pipe is open, the intelligent control valve on the outside of the water injection pipe is closed. External gas extraction equipment can extract gas from the coal seam through the gas extraction pipe. When the intelligent control valve on the outside of the water injection pipe is open, the intelligent control valve on the outside of the gas extraction pipe is closed. External water injection equipment can inject water into the coal seam.

[0016] S3: When a blowout occurs, the remote control device can start the servo motor. The output end of the servo motor can drive the bevel gear to rotate, thereby driving the bevel gear arc to move and causing the rotating ring to rotate on the mounting ring. The movement of the bevel gear arc can drive the connecting block to move, thereby driving the sealing disc to move through the connecting rod. This causes the second through groove inside the sealing disc to be misaligned with the first through groove inside the mounting plate, thereby sealing through grooves one and two and stopping the blowout.

[0017] S4: When the sealing disc rotates, it can drive the arc-shaped block to rotate, thereby driving the locking rod to move inside the rectangular groove through the cooperation of the arc-shaped groove and the arc-shaped slider. This allows one end of the locking rod to be inserted into the inside of the well wall, reinforcing the device inside the wellhead and effectively preventing blowout.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: when the intelligent control valve on the outside of the gas extraction pipe is opened, the intelligent control valve on the outside of the water injection pipe is closed, and the external gas extraction equipment can extract gas from the coal seam through the gas extraction pipe. When the intelligent control valve on the outside of the water injection pipe is opened, the intelligent control valve on the outside of the gas extraction pipe is closed, and the external water injection equipment can inject water into the coal seam. This enables the multi-purpose function of a single hole, which can effectively extract gas from the coal seam, perform water injection operations on the coal seam, and monitor the pressure and gas concentration in the coal seam in real time, providing a strong guarantee for the safe mining of coal seams. In addition, when a blowout occurs, the remote control equipment can activate the servo motor. The output of the servo motor can drive the bevel gear to rotate, thereby moving the bevel gear arc and causing the rotating ring to rotate on the mounting ring. The movement of the bevel gear arc can also move the connecting block, which in turn moves the sealing disc through the connecting rod. This causes the second through-slot inside the sealing disc to be misaligned with the first through-slot inside the mounting plate, thus sealing both through-slots and effectively preventing the continued ejection of fluid from the well. This achieves emergency sealing of the blowout, enabling a rapid response the instant a blowout occurs and completing the sealing task in an efficient and reliable manner, providing strong protection for the safety of downhole operations. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-dimensional appearance structure of the present invention.

[0020] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective.

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention without the inner frame.

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the inner frame of the present invention.

[0023] Figure 5 This is a three-dimensional structural diagram of the driving component and the sealing and locking component of the present invention.

[0024] Figure 6 This is a three-dimensional structural diagram of the sealing and locking component of the present invention.

[0025] Figure 7 This is a schematic diagram of the three-dimensional structure of the locking rod of the present invention.

[0026] Figure 8 This is a three-dimensional structural diagram of the control box of the present invention.

[0027] In the diagram: 1. Outer frame; 2. Placement eaves; 3. Connecting ring; 4. Mounting pipe; 5. Fixed pin; 6. Rotating ring; 7. Control box; 8. Gas extraction pipe; 9. Water injection pipe; 10. Servo motor; 11. Bevel gear; 12. Fixing plate; 13. Bevel gear arc; 14. Connecting rod; 15. Rectangular groove; 16. Mounting plate; 17. Through groove one; 18. Locking rod; 19. Inner frame; 20. Limiting plate; 21. Mounting ring; 22. Through groove two; 23. Sealing plate; 24. Intelligent control valve; 25. Control box; 26. Junction box; 27. Connecting block; 28. Arc block; 29. ​​Arc slide groove; 30. Support ring; 31. Arc slider; 32. Mounting groove; 33. Anti-detachment block. 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 1-8This invention provides a technical solution: a multi-purpose wellhead device for coal seam gas extraction and water injection, comprising an outer frame 1 and an inner frame 19. A placement eave 2 is fixedly installed on the top of the outer frame 1, and an installation groove 32 is formed on the top of the placement eave 2. Support rings 30 are fixedly installed on both sides of the inner cavity of the installation groove 32. An installation plate 16 is fixedly installed on the bottom of the inner frame 19. An installation pipe 4 is fixedly installed inside the installation plate 16 via bearings. A pressure sensor and a gas concentration detector are installed at the bottom end of the installation pipe 4. A control box 7 is fixedly installed on the top of the installation pipe 4. A gas extraction pipe 8 and a water injection pipe are fixedly installed inside the installation pipe 4 and the control box 7. Intelligent control valves 24 are fixedly installed on the outside of pipe 9, gas extraction pipe 8 and water injection pipe 9. Control box 25 is fixedly installed inside control box 7. Junction box 26 is fixedly installed on the outside of control box 7. Mounting ring 21 is fixedly installed on the top of inner frame 19. Drive assembly is installed on the top of mounting ring 21. Sealing and locking assembly is installed inside inner frame 19. Inner frame 19 is movably installed inside outer frame 1. Snap ring is fixedly installed at the bottom of mounting ring 21 and snap ring is snapped into the inside of mounting groove 32. Fixed pin 5 is movably installed inside mounting groove 32. Anti-detachment block 33 is fixedly installed on the top of fixed pin 5.

[0030] The working principle of the above technical solution is as follows: First, place the outer frame 1 inside the drilled wellhead, ensuring the outer side of the connecting ring 3 contacts the well wall. Then, insert the fixing pin 5 into the soil along the edge of the wellhead. Next, place the bottom of the mounting ring 21 on top of the support ring 30 inside the mounting groove 32 at the top of the placement eaves 2, so that the inner frame 19 is located inside the outer frame 1. Then, connect the gas extraction pipe 8 to the external gas extraction equipment and the water injection pipe 9 to the external water injection equipment. Finally, connect the device to the remote control equipment through the junction box 26. The pressure sensor and gas concentration detector at the bottom of the mounting pipe 4 can detect the pressure and gas concentration in the coal seam. The detection results can be transmitted to the control box 25 and then to the remote control equipment through the junction box 26. The remote control equipment can control the intelligent control valves 24 on the outside of the gas extraction pipe 8 and the water injection pipe 9 based on pressure and gas concentration data. When the intelligent control valve 24 on the outside of the gas extraction pipe 8 is open, the intelligent control valve 24 on the outside of the water injection pipe 9 is closed, allowing external gas extraction equipment to extract gas from the coal seam through the gas extraction pipe 8. When the intelligent control valve 24 on the outside of the water injection pipe 9 is open, the intelligent control valve 24 on the outside of the gas extraction pipe 8 is closed, allowing external water injection equipment to inject water into the coal seam. This multi-functional system can effectively extract gas from the coal seam, inject water into the coal seam, and monitor the pressure and gas concentration in the coal seam in real time, providing a strong guarantee for safe coal mining.

[0031] In another implementation scheme, such as Figures 1-8As shown, the drive assembly includes a servo motor 10 and a rotating ring 6. A bevel gear 11 is fixedly mounted on the output end of the servo motor 10. A bevel tooth arc 13 is fixedly mounted on the top of the rotating ring 6. The outer sides of the bevel gear 11 and the outer sides of the bevel tooth arc 13 mesh with each other. A connecting block 27 is fixedly mounted on one side of the bevel tooth arc 13. A connecting rod 14 is fixedly mounted on the bottom of the connecting block 27. A fixing plate 12 is fixedly mounted on the bottom of the servo motor 10. One side of the fixing plate 12 is fixedly mounted on one side of the mounting ring 21. The sealing and locking assembly includes a sealing assembly and a locking assembly. The sealing assembly includes a sealing disc 23, with a second through groove 22 inside the sealing disc 23. The sealing disc 23 is rotatably mounted inside the top of the mounting plate 16. The mounting plate 16 has a first through groove 17 inside the mounting plate 16. The specifications of the first through groove 17 and the second through groove 22 are the same, and the positions of the first through groove 17 and the second through groove 22 correspond to each other. The end of the connecting rod 14 away from the connecting block 27 is fixedly connected to the top of the sealing disc 23. A limiting plate 20 is fixedly installed inside the inner frame 19, and the bottom of the limiting plate 20 is in contact with the top of the sealing disc 23.

[0032] When a blowout occurs, the remote control device can activate the servo motor 10. The output of the servo motor 10 can drive the bevel gear 11 to rotate, thereby moving the bevel gear arc 13 and causing the rotating ring 6 to rotate on the mounting ring 21. The movement of the bevel gear arc 13 can also move the connecting block 27, which in turn moves the sealing disc 23 via the connecting rod 14. This causes the second through groove 22 inside the sealing disc 23 to be misaligned with the first through groove 17 inside the mounting plate 16, thus sealing both through groove 17 and through groove 22. This effectively prevents the continued ejection of fluid from the well, achieving emergency sealing of the blowout. It can react quickly at the moment a blowout occurs, completing the sealing task in an efficient and reliable manner, providing strong protection for the safety of downhole operations.

[0033] In another implementation scheme, such as Figures 1-8 As shown, the locking assembly includes three arc-shaped blocks 28. Each of the three arc-shaped blocks 28 has a water injection pipe 9 inside one side. Arc-shaped sliders 31 are fixedly installed inside the arc-shaped sliding grooves 29. A locking rod 18 is fixedly installed at one end of the arc-shaped sliders 31. A sleeve ring 3 is fixedly installed on the outside of the outer frame 1. Rectangular grooves 15 are opened inside the outer frame 1, the sleeve ring 3, and the inner frame 19. The end of the locking rod 18 away from the arc-shaped sliders 31 is slidably inserted into the rectangular groove 15.

[0034] When the inner frame 19 is installed inside the outer frame 1, the rectangular grooves 15 can be aligned together. Then, the locking rod 18 is slid into the inside of the rectangular groove 15. When the sealing disc 23 rotates, it can drive the arc block 28 to rotate. Thus, the cooperation of the arc groove 29 and the arc slider 31 drives the locking rod 18 to move inside the rectangular groove 15, so that one end of the locking rod 18 is inserted into the inside of the well wall, and the device is reinforced inside the wellhead. This reinforcement method makes full use of the stability of the well wall, so that the device can remain stable when facing the huge pressure and impact force generated by the blowout, effectively preventing the device from being blown out of the wellhead by the powerful force of the blowout, thereby avoiding the further expansion of the blowout accident.

[0035] A control method for a multi-purpose wellhead device for coal seam gas extraction and water injection includes the following steps: S1: First, the gas extraction pipe 8 is connected to the external gas extraction equipment, and the water injection pipe 9 is connected to the external water injection equipment. Then, the pipe is connected to the remote control equipment through the junction box 26. The pressure sensor and gas concentration detector at the bottom of the pipe 4 can detect the pressure and gas concentration in the coal seam. The detection results can be transmitted to the control box 25, and then transmitted to the remote control equipment through the junction box 26. The remote control equipment can control the intelligent control valve 24 on the outside of the gas extraction pipe 8 and the water injection pipe 9 according to the pressure and gas concentration data.

[0036] S2: When the intelligent control valve 24 on the outside of the gas extraction pipe 8 is opened, the intelligent control valve 24 on the outside of the water injection pipe 9 is closed, and the external gas extraction equipment can extract gas from the coal seam through the gas extraction pipe 8. When the intelligent control valve 24 on the outside of the water injection pipe 9 is opened, the intelligent control valve 24 on the outside of the gas extraction pipe 8 is closed, and the external water injection equipment can inject water into the coal seam.

[0037] S3: When a blowout occurs, the remote control device can start the servo motor 10. The output end of the servo motor 10 can drive the bevel gear 11 to rotate, thereby driving the bevel gear arc 13 to move, and driving the rotating ring 6 to rotate on the mounting ring 21. The movement of the bevel gear arc 13 can drive the connecting block 27 to move, thereby driving the sealing disc 23 to move through the connecting rod 14. This causes the second through groove 22 inside the sealing disc 23 to be misaligned with the first through groove 17 inside the mounting plate 16, thereby sealing the first through groove 17 and the second through groove 22, and sealing the blowout.

[0038] S4: When the sealing disc 23 rotates, it can drive the arc block 28 to rotate, thereby driving the locking rod 18 to move inside the rectangular groove 15 in cooperation with the arc groove 29 and the arc slider 31, so that one end of the locking rod 18 is inserted into the inside of the well wall, and the device is reinforced inside the wellhead, effectively preventing blowout.

[0039] 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 multi-purpose wellhead device for coal seam gas extraction and water injection, comprising an outer frame (1) and an inner frame (19), characterized in that: The top of the outer frame (1) is fixedly equipped with a placement eave (2), and the top of the placement eave (2) is provided with a mounting groove (32). Support rings (30) are fixedly installed on both sides of the inner cavity of the mounting groove (32). The bottom of the inner frame (19) is fixedly equipped with a mounting plate (16). The inside of the mounting plate (16) is fixedly equipped with a mounting tube (4) through a bearing. The bottom end of the mounting tube (4) is equipped with a pressure sensor and a gas concentration detector. The top of the mounting tube (4) is fixedly equipped with a control box (7). (4) and the control box (7) are fixedly installed with a gas extraction pipe (8) and a water injection pipe (9). A smart control valve (24) is fixedly installed on the outside of the gas extraction pipe (8) and the water injection pipe (9). A control box (25) is fixedly installed inside the control box (7). A junction box (26) is fixedly installed on the outside of the control box (7). An installation ring (21) is fixedly installed on the top of the inner frame (19). A drive assembly is installed on the top of the installation ring (21). A sealing and locking assembly is installed inside the inner frame (19).

2. The multi-purpose wellhead device for coal seam gas extraction and water injection according to claim 1, characterized in that: The inner frame (19) is movably installed on the inner side of the outer frame (1), and a snap-fit ​​ring is fixedly installed at the bottom of the mounting ring (21), and the snap-fit ​​ring is snap-fitted on the inner side of the mounting groove (32).

3. The multi-purpose wellhead device for coal seam gas extraction and water injection according to claim 2, characterized in that: The drive assembly includes a servo motor (10) and a rotating ring (6). A bevel gear (11) is fixedly installed at the output end of the servo motor (10). A bevel tooth arc (13) is fixedly installed at the top of the rotating ring (6). The outer side of the bevel gear (11) meshes with the outer side of the bevel tooth arc (13). A connecting block (27) is fixedly installed on one side of the bevel tooth arc (13). A connecting rod (14) is fixedly installed at the bottom of the connecting block (27). A fixing plate (12) is fixedly installed at the bottom of the servo motor (10). One side of the fixing plate (12) is fixedly installed on one side of the mounting ring (21).

4. The multi-purpose wellhead device for coal seam gas extraction and water injection according to claim 3, characterized in that: The blocking and locking assembly includes a blocking assembly and a locking assembly. The blocking assembly includes a blocking disc (23). The blocking disc (23) has a through groove two (22) inside. The blocking disc (23) is rotatably mounted inside the top of the mounting plate (16). The mounting plate (16) has a through groove one (17) inside.

5. The multi-purpose wellhead device for coal seam gas extraction and water injection according to claim 4, characterized in that: The specifications of the first through slot (17) and the second through slot (22) are the same, and the positions of the first through slot (17) and the second through slot (22) correspond to each other. The end of the connecting rod (14) away from the connecting block (27) is fixedly connected to the top of the sealing plate (23).

6. The multi-purpose wellhead device for coal seam gas extraction and water injection according to claim 5, characterized in that: The inner frame (19) is fixedly installed with a limiting plate (20), and the bottom of the limiting plate (20) is in contact with the top of the sealing plate (23).

7. The multi-purpose wellhead device for coal seam gas extraction and water injection according to claim 6, characterized in that: The locking assembly includes three arc-shaped blocks (28), each of which has a water injection pipe (9) inside one side. Each of the arc-shaped slides (29) has an arc-shaped slider (31) fixedly installed inside, and a locking rod (18) is fixedly installed at one end of the arc-shaped slider (31).

8. The multi-purpose wellhead device for coal seam gas extraction and water injection according to claim 7, characterized in that: A sleeve ring (3) is fixedly installed on the outside of the outer frame (1). A rectangular groove (15) is opened inside the outer frame (1), the sleeve ring (3) and the inner frame (19). The locking rod (18) is slidably inserted into the rectangular groove (15) at one end away from the arc-shaped slider (31).

9. A multi-purpose wellhead device for coal seam gas extraction and water injection according to claim 8, characterized in that: The mounting slot (32) is equipped with a fixed pin (5), and the top of each fixed pin (5) is fixedly equipped with an anti-detachment block (33).

10. A control method for a multi-purpose wellhead device for coal seam gas extraction and water injection as described in claims 1-9, characterized in that: Includes the following steps: S1: First, connect the gas extraction pipe (8) to the external gas extraction equipment and the water injection pipe (9) to the external water injection equipment. Then, connect the pipe to the remote control equipment through the junction box (26). The pressure sensor and gas concentration detector at the bottom of the pipe (4) can detect the pressure and gas concentration in the coal seam. The detection results can be transmitted to the control box (25) and then transmitted to the remote control equipment through the junction box (26). The remote control equipment can control the intelligent control valve (24) outside the gas extraction pipe (8) and the water injection pipe (9) according to the pressure and gas concentration data. S2: When the intelligent control valve (24) outside the gas extraction pipe (8) is opened, the intelligent control valve (24) outside the water injection pipe (9) is closed, and the external gas extraction equipment can extract gas from the coal seam through the gas extraction pipe (8). When the intelligent control valve (24) outside the water injection pipe (9) is opened, the intelligent control valve (24) outside the gas extraction pipe (8) is closed, and the external water injection equipment can inject water into the coal seam. S3: When a blowout occurs, the remote control device can control the servo motor (10) to start. The output end of the servo motor (10) can drive the bevel gear (11) to rotate, thereby driving the bevel tooth arc (13) to move, and driving the rotating ring (6) to rotate on the mounting ring (21). The movement of the bevel tooth arc (13) can drive the connecting block (27) to move, thereby driving the sealing plate (23) to move through the connecting rod (14). This causes the second through groove (22) inside the sealing plate (23) to be misaligned with the first through groove (17) inside the mounting plate (16), thereby sealing the first through groove (17) and the second through groove (22) to block the blowout. S4: When the sealing disc (23) rotates, it can drive the arc block (28) to rotate, thereby driving the locking rod (18) to move inside the rectangular groove (15) in cooperation with the arc groove (29) and the arc slider (31), so that one end of the locking rod (18) is inserted into the inside of the well wall, and the device is reinforced inside the wellhead, effectively preventing blowout.

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