Leakage-proof wellhead device for geological storage of water depth of mine

Abstract

The invention discloses a leakage-proof well head device for geological storage of a water depth part of a mine, and relates to the technical field of well head sealing, the leakage-proof well head device comprises a well head pressure-bearing module, an axial displacement compensation module, a shearing module and a sealing module, the lower end of the wellhead pressure-bearing module is connected with the upper end of the axial displacement compensation module, the lower end of the axial displacement compensation module is connected with the upper end of the sealing module, and the shearing module is arranged in the sealing module and used for crushing impurities in mine water entering the wellhead pressure-bearing module. The lower end of the sealing module is used for being arranged on the periphery of the upper end of a well mouth casing pipe in a sleeving mode, and the sealing module is used for preventing mine water in the well mouth casing pipe from flowing out. The problem of mine water leakage can be effectively solved, and meanwhile impurity accumulation and blockage in mine water are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of wellhead sealing, and particularly to a leak-proof wellhead device for deep geological storage of mine water depth. Background Art

[0002] In coal mining areas, the problem of high-salt water is often encountered, which poses a great threat to coal mining and the safety of miners. To solve this problem, deep geological storage methods for high-salt water have begun to be applied. The wellhead device is a key component of deep geological storage equipment. As an important device connecting the pumping station pipeline and the injection well, it plays an important role in bearing water pressure, monitoring pressure, and preventing leakage during the water injection process. During use, high-intensity water injection will have an adverse impact on the pressure resistance performance and service life of the wellhead device. Therefore, there is a particular need for a leak-proof wellhead device that can be applied to deep geological storage of mine water depth.

[0003] Existing wellhead devices usually have certain drawbacks. Since they usually use flanges to directly connect the wellhead device and the injection wellhead, there is a problem of stress concentration, and leakage is likely to occur when there is a large water pressure inside the pipeline for a long time; moreover, the mine water in coal mines contains impurities such as high salt content, high hardness, and suspended particulate matter. These impurities will have an adverse impact on the service life and performance of the wellhead device due to accumulation during the storage process, resulting in device failures and reduced efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a leak-proof wellhead device for deep geological storage of mine water depth to solve the problems existing in the above-mentioned prior art, effectively solve the problem of mine water leakage, and at the same time avoid the accumulation and blockage of impurities in the mine water.

[0005] To achieve the above purpose, the present invention provides the following solutions: The present invention provides a leak-proof wellhead device for deep geological storage of mine water depth, including a wellhead pressure-bearing module, an axial displacement compensation module, a shear module, and a sealing module. The wellhead pressure-bearing module is used to connect the wellhead casing and the ground pipeline, and the lower end of the wellhead pressure-bearing module is connected to the upper end of the axial displacement compensation module. The lower end of the axial displacement compensation module is connected to the upper end of the sealing module. The shear module is arranged inside the sealing module, and the shear module is used to break the impurities in the mine water entering the wellhead pressure-bearing module. The lower end of the sealing module is used to sleeve the outer periphery of the upper end of the wellhead casing, and the sealing module is used to prevent the mine water in the wellhead casing from flowing out.

[0006] Preferably, a plurality of communication ports are provided on the side wall of the wellhead pressure-bearing module. The communication ports are used to connect the ground pipeline through flanges, and the flanges and the ground pipeline are in transitional fit.

[0007] Preferably, the axial displacement compensation module is a corrugated compensation pipe. The upper end of the corrugated compensation pipe is connected to the lower end of the wellhead pressure-bearing module by submerged arc welding, and the lower end of the corrugated compensation pipe is detachably connected to the sealing module.

[0008] Preferably, the sealing module includes a sealing housing and a sealing assembly. The shearing module is installed in the upper part of the sealing housing, and the sealing assembly is installed in the middle of the sealing housing. The upper end of the sealing housing is detachably connected to the axial displacement compensation module. The lower end of the sealing housing is welded and fixed to the outer periphery of the wellhead casing. The sealing assembly is used to be arranged at the upper end of the wellhead casing.

[0009] Preferably, the upper end of the sealing housing and the axial displacement compensation module are connected by a clamp.

[0010] Preferably, the sealing assembly includes a mechanical seal element, a metal self-tightening ring and an adsorption element. The adsorption element is located below the shearing module, and the adsorption element is used to filter impurities in the mine water. The mechanical seal element is located below the adsorption element, and the metal self-tightening ring is located below the mechanical seal element. A circular groove is provided on the inner wall of the sealing housing corresponding to the position of the metal self-tightening ring, and the metal self-tightening ring is installed in the circular groove. The mechanical seal element is arranged corresponding to the upper end of the wellhead casing, and the metal self-tightening ring is arranged corresponding to the outer periphery of the upper end of the wellhead sleeve.

[0011] Preferably, the mechanical seal element includes a stationary ring and a rotating ring. The stationary ring is located below the rotating ring, and the rotating ring is sleeved on the outer periphery of a rotating shaft. The stationary ring is connected to the inner wall of the sealing housing. The rotating shaft can drive the rotating ring to rotate. A plurality of grooves are provided at the lower end of the outer edge of the rotating ring, and a plurality of diversion holes are provided at the outer edge of the stationary ring. A metal sheet is rotatably connected in each of the diversion holes. When the water flows from top to bottom, the metal sheet can rotate to open the diversion hole. When the water flows from bottom to top, the metal sheet can rotate to block the diversion hole.

[0012] Preferably, the adsorption element is a nano-composite material layer.

[0013] Preferably, the shearing module includes a connecting shaft, a fixing ring and a plurality of rotating blades. A water passing plate is provided in the sealing housing, and the water passing plate can allow the mine water to pass through. The connecting shaft is installed in the middle of the upper end of the water passing plate. The fixing ring is rotatably installed on the outer periphery of the connecting shaft. The plurality of rotating blades are evenly arranged around the outer periphery of the fixing ring, and the first end of the rotating blade is fixed to the outer wall of the fixing ring, and the second end of the rotating blade extends towards the inner wall of the sealing housing.

[0014] Preferably, the shearing module further includes a fixed blade, which is installed on the connecting shaft and arranged around the outer periphery of the connecting shaft. The fixed blade is located below the rotating blade, and when the rotating blade rotates, it can jointly shear and crush the impurities in the mine water with the fixed blade.

[0015] The present invention has achieved the following technical effects compared with the prior art: The anti-leakage wellhead device for deep geological sequestration of mine water provided by the present invention includes a wellhead pressure-bearing module, an axial displacement compensation module, a shearing module and a sealing module. The wellhead pressure-bearing module is used to connect the wellhead casing and the ground pipeline, so as to introduce the mine water into the wellhead casing through the ground pipeline, and bear the pressure through the wellhead pressure-bearing component to improve the stability of the overall structure. The lower end of the wellhead pressure-bearing module is connected to the upper end of the axial displacement compensation module, and the lower end of the axial displacement compensation module is connected to the upper end of the sealing module. Then, the axial displacement compensation module is used to compensate the axial displacement caused by the formation movement process and absorb mechanical vibration. The shearing module is arranged in the sealing module, and the shearing module is used to crush the impurities in the mine water entering the wellhead pressure-bearing module, and then shear and crush the larger particle size impurities into smaller particle sizes, so as to avoid the accumulation of large particle size impurities in the anti-leakage wellhead device for deep geological sequestration of mine water and damage its internal structure, affecting the normal operation. The lower end of the sealing module is used to sleeve the outer periphery of the upper end of the wellhead casing, and the sealing module is used to prevent the mine water in the wellhead casing from flowing back from bottom to top, and avoid leakage at the connection between the sealing module and the wellhead casing due to excessive pressure during the process of injecting mine water into the wellbore. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the anti-leakage wellhead device for deep geological sequestration of mine water in the present invention; Figure 2 It is a schematic structural diagram of the shearing module in the present invention; Figure 3 It is a schematic structural diagram of the sealing module in the present invention; In the figure: 1 - Wellhead pressure-bearing module, 2 - Axial displacement compensation module, 3 - Sealing housing, 4 - Rotary blade, 5 - Fixed blade, 6 - Connecting shaft, 7 - Water passing plate, 8 - Fixed ring, 9 - Adsorption element, 10 - Rotary ring, 11 - Static ring, 12 - Metal self-tightening ring, 13 - Wellhead casing, 14 - Rotary shaft, 15 - Groove, 16 - Diversion hole, 17 - Metal sheet. Specific implementation manner

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] The purpose of the present invention is to provide a leak-proof wellhead device for deep geological storage of mine water to solve the problems existing in the prior art, effectively solve the problem of mine water leakage, and at the same time avoid the accumulation and blockage of impurities in mine water.

[0020] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0021] As Figures 1 - 3 shown, this embodiment provides a leak-proof wellhead device for deep geological storage of mine water, including a wellhead pressure-bearing module 1, an axial displacement compensation module 2, a shearing module and a sealing module. The wellhead pressure-bearing module 1 is used to connect the wellhead casing 13 and the ground pipeline, so as to introduce mine water into the wellhead casing 13 through the ground pipeline, and bear the pressure through the wellhead pressure-bearing assembly to improve the stability of the overall structure. The lower end of the wellhead pressure-bearing module 1 is connected to the upper end of the axial displacement compensation module 2, and the lower end of the axial displacement compensation module 2 is connected to the upper end of the sealing module. Furthermore, the axial displacement compensation module 2 is used to compensate the axial displacement caused during the formation movement and absorb mechanical vibration. The shearing module is arranged in the sealing module, and the shearing module is used to crush the impurities in the mine water entering the wellhead pressure-bearing module 1, and then shear and crush the larger particle size impurities into smaller particle sizes, so as to avoid the accumulation of large particle size impurities in the leak-proof wellhead device for deep geological storage of mine water and damage its internal structure, affecting normal operation. The lower end of the sealing module is used to sleeved on the outer periphery of the upper end of the wellhead casing 13, and the sealing module is used to prevent the mine water in the wellhead casing 13 from flowing back from bottom to top, and avoid the phenomenon of leakage at the connection between the sealing module and the wellhead casing 13 due to excessive pressure during the process of injecting mine water into the wellbore.

[0022] Specifically, a number of communication ports are provided on the side wall of the wellhead pressure-bearing module 1. The communication ports are used to connect to the ground pipeline through a flange, and the flange and the ground pipeline are in transitional fit. Thus, a detachable connection between the wellhead pressure-bearing module 1 and the ground pipeline is achieved through the flange, so as to form a first-stage pressure barrier above the wellhead casing 13.

[0023] The axial displacement compensation module 2 is a corrugated compensator. The corrugated compensator can be used to achieve the axial compensation of the wellhead casing 13, and has a large compensation amount. Thus, it can compensate for the axial displacement caused during the formation movement. The upper end of the corrugated compensator is connected to the lower end of the wellhead pressure-bearing module 1 by submerged arc welding, and the lower end of the corrugated compensator is detachably connected to the sealing module. Those skilled in the art can also select other connection methods according to actual needs.

[0024] The sealing module includes a sealing housing 3 and a sealing assembly. The shearing module is installed in the upper part of the sealing housing 3, and the sealing assembly is installed in the middle part of the sealing housing 3. The shearing module can shear the impurities in the mine water after the mine water enters the sealing housing 3 from the upper end of the sealing housing 3 and before reaching the sealing assembly, so as to avoid the accumulation of large-particle impurities in the mine water at the sealing assembly, which affects the normal operation and service life of the equipment. The upper end of the sealing housing 3 is detachably connected to the axial displacement compensation module 2, the lower end of the sealing housing 3 is welded and fixed to the outer circumference of the wellhead casing 13, and the sealing assembly is used to connect to the upper end of the wellhead casing 13 to achieve pressure gradient sealing.

[0025] The upper end of the sealing housing 3 and the axial displacement compensation module 2 are connected by a clamp, which not only ensures the connection stability but also facilitates installation and disassembly.

[0026] The sealing assembly includes a mechanical seal element, a metal self-tightening ring 12 and an adsorption element 9, forming a three-stage sealing structure. The adsorption element 9 is located below the shearing module. After the shearing element cuts large-particle impurities in the mine water into small particles, the adsorption element 9 can further filter the impurities in the mine water, improving the impurity treatment effect and efficiency. The mechanical seal element is located below the adsorption element 9, so that the mine water adsorbed by the adsorption element 9 can flow through the mechanical seal element and enter the wellhead casing 13. The mechanical seal element is sleeved on the outer periphery of the upper end of the wellhead casing 13. The metal self-tightening ring 12 is located below the mechanical seal element, and a circular groove is formed at the position corresponding to the metal self-tightening ring 12 on the inner wall of the sealing housing 3. The metal self-tightening ring 12 is installed in the circular groove. As a preferred solution in this embodiment, the lower end of the sealing housing 3 extends towards the central axis of the sealing housing 3 to form a stepped surface. The upper end of the stepped surface and the inner side wall of the sealing housing 3 can form a circular groove. The metal self-tightening ring 12 is arranged corresponding to the outer periphery of the upper end of the wellhead casing 13 to seal the connection between the sealing housing 3 and the wellhead casing 13. In the initial state, the metal self-tightening ring 12 has a certain pre-tightening force due to its own elasticity. During operation, when the mine water contacts the inner surface of the metal self-tightening ring 12 in the sealing housing 3, a relatively high pressure is generated at this time, making the contact between the metal self-tightening ring 12 and the wellhead casing 13 and the contact between the metal self-tightening ring 12 and the sealing housing 3 closer, and thus making the seal more reliable. When the pressure in the sealing housing 3 decreases, the pressure acting on the sealing housing 3 also decreases accordingly. While ensuring good sealing, the pressure of the metal self-tightening ring 12 on the connection between the wellhead casing 13 and the sealing housing 3 decreases, and thus the wear can be reduced.

[0027] The mechanical seal element includes a stationary ring 11 and a rotating ring 10. The stationary ring 11 is located below the rotating ring 10, and the rotating ring 10 is sleeved on the outer periphery of a rotating shaft 14. The stationary ring 11 is connected to the inner wall of the seal housing 3. The rotating shaft 14 can drive the rotating ring 10 to rotate. Through the rotation of the rotating ring 10 relative to the stationary ring 11, the sealing function can be realized. The rotating ring 10 is preferably made of wear-resistant materials (such as tungsten carbide), and the stationary ring 11 is preferably made of corrosion-resistant non-metallic materials (such as graphite). The contact surface between the rotating ring 10 and the stationary ring 11 is precisely ground and polished to form a micron-level fitting gap. After the mine water enters the inside of the seal housing 3, the water pressure acts on the back surface of the rotating ring 10, pushing the rotating ring 10 to press tightly against the stationary ring 11, enhancing the fitting force of the sealing surface. A number of grooves 15 are evenly machined on the edge of the sealing surface of the rotating ring 10, and diversion holes 16 are machined at positions corresponding to the grooves 15 on the edge of the sealing surface of the stationary ring 11. A movable metal sheet 17 is arranged in each diversion hole 16. The metal sheet 17 is hinged to the hole wall of the diversion hole 16 through a pin shaft, and the top can rotate around the pin shaft. In the initial state, the metal sheet 17 fits against the inner wall of the diversion hole 16 to block the channel. When the mine water flows from top to bottom, it flows into the diversion hole 16 through the groove 15 and pushes the metal sheet 17 to rotate around the pin shaft. At this time, the metal sheet 17 rotates to open the diversion hole 16, completing one-way conduction, enabling the mine water to pass through the diversion hole 16. When the mine water attempts to flow in the reverse direction (i.e., from bottom to top), the pressure pushes the metal sheet 17 to rotate in the reverse direction and makes the metal sheet 17 rotate to closely fit the sealing surface of the rotating ring 10, realizing the blocking of the diversion hole 16, so that the mine water cannot pass through the diversion hole 16. Under the action of the reverse water pressure, the rotating ring 10 further presses tightly against the stationary ring 11, forming a zero-gap seal between the metal sheet 17 and the rotating ring 10, blocking the water flow back and forming an axial seal. At the same time, when designing the metal sheet 17, a torsion spring structure can be designed at the pin shaft, so that in the state without external force, the metal sheet 17 is in the state of blocking the diversion hole 16. When the water flows from top to bottom, the pressure of the water flow can overcome the elastic force of the torsion spring and push open the metal sheet 17. When the water flow stops, the metal sheet 17 returns to the state of blocking the diversion hole 16 under the drive of the torsion spring. Moreover, in order to further prevent the metal sheet 17 from opening when the water flows from bottom to top, a limiting block can be fixed at a position corresponding to the upper part of the free end of the metal sheet 17 on the inner wall of the diversion hole 16. When the water rotates from top to bottom, the metal sheet 17 is limited below the limiting block and thus cannot continue to rotate, realizing the effective blocking of the diversion hole 16. The adsorption element 9 is a nanocomposite material layer, such as graphene-modified polymer, ceramic-based nanomaterial, etc., which has excellent corrosion resistance. Those skilled in the art can select specific materials according to actual needs.

[0028] The shearing module includes a connecting shaft 6, a fixing ring 8 and a plurality of rotary blades 4. A water passing plate 7 is arranged in the sealing housing 3. The water passing plate 7 enables mine water to pass through. The connecting shaft 6 is installed in the middle of the upper end of the water passing plate 7. Thus, through the arrangement of the water passing plate 7, while ensuring that the mine water can pass through smoothly, it is also convenient to install the connecting shaft 6. The fixing ring 8 is rotatably installed on the outer periphery of the connecting shaft 6. The plurality of rotary blades 4 are evenly arranged around the outer periphery of the fixing ring 8. The first end of the rotary blade 4 is fixed to the outer wall of the fixing ring 8, and the second end of the rotary blade 4 extends towards the inner wall of the sealing housing 3. Thus, with the introduction of the mine water, the mine water can push the rotary blades 4 to rotate and cut the impurities in the mine water.

[0029] As a preferred solution of this embodiment, the shearing module further includes a fixed blade 5. The fixed blade 5 is installed on the connecting shaft 6 and is arranged around the outer periphery of the connecting shaft 6. The fixed blade 5 is located below the rotary blade 4, and the gap between the fixed blade 5 and the rotary blade 4 is small, as long as it satisfies that the fixed blade 5 does not affect the rotation of the rotary blade 4, and the rotary blade 4 and the fixed blade 5 can jointly act on the impurities in the mine water. When the rotary blade 4 rotates, it can jointly shear and crush the impurities in the mine water with the fixed blade 5.

[0030] As another preferred solution of this embodiment, for the structural design of the shearing module, it can also be designed that the connecting shaft 6 is connected to the rotary blade 4, while the fixed blade 5 is connected to a fixed structure such as the side wall of the sealing housing 3, and the connecting shaft 6 can rotate. At the same time, the connecting shaft 6 can also be coaxially connected to the rotating shaft 14, so that the connecting shaft 6 can drive the rotating shaft 14 to rotate. Thus, through the rotation of the rotating shaft 14, the rotation of the rotating ring 10 is realized, and the sealing effect is achieved through the cooperation of the stationary ring 11 and the rotating ring 10.

[0031] As another preferred solution of this embodiment, the fixed blade 5 can also be installed on the inner wall of the sealing housing 3 and is arranged around the outer periphery of the axis of the sealing housing 3. The second end of the rotary blade 4 is arranged close to the fixed blade 5, and when the rotary blade 4 rotates, it can jointly shear and crush the impurities in the mine water with the fixed blade 5.

[0032] In order to ensure the cutting effectiveness of the rotary blade 4 and the fixed blade 5, a driving device such as a hydraulic motor can also be added in this embodiment. By driving the rotary blade 4 to rotate, the rotation speed of the rotary blade 4 is increased, and thus the shearing force between the rotary blade 4 and the fixed blade 5 is increased, realizing the effective cutting of the impurities in the mine water.

[0033] In the present invention, specific examples are used to illustrate the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An anti-leakage wellhead device for deep geological storage of mine water depth, characterized in that: It includes a wellhead pressure-bearing module, an axial displacement compensation module, a shearing module and a sealing module. The wellhead pressure-bearing module is used to connect the wellhead casing and the ground pipeline, and the lower end of the wellhead pressure-bearing module is connected to the upper end of the axial displacement compensation module. The lower end of the axial displacement compensation module is connected to the upper end of the sealing module. The shearing module is arranged in the sealing module, and the shearing module is used to crush impurities in the mine water entering the wellhead pressure-bearing module. The lower end of the sealing module is used to sleeve the outer periphery of the upper end of the wellhead casing, and the sealing module is used to prevent the mine water in the wellhead casing from flowing out.

2. The anti-leakage wellhead device for deep geological storage of mine water depth according to claim 1, characterized in that: A number of communication ports are provided on the side wall of the wellhead pressure-bearing module. The communication ports are used to connect the ground pipeline through flanges, and the flanges and the ground pipeline adopt a transitional fit.

3. The anti-leakage wellhead device for deep geological storage of mine water depth according to claim 1, characterized in that: The axial displacement compensation module is a corrugated compensation pipe. The upper end of the corrugated compensation pipe is welded to the lower end of the wellhead pressure-bearing module by submerged arc welding, and the lower end of the corrugated compensation pipe is detachably connected to the sealing module.

4. The anti-leakage wellhead device for deep geological storage of mine water depth according to claim 1, characterized in that: The sealing module includes a sealing housing and a sealing assembly. The shearing module is installed in the upper part of the sealing housing. The sealing assembly is installed in the middle of the sealing housing. The upper end of the sealing housing is detachably connected to the axial displacement compensation module. The lower end of the sealing housing is welded and fixed to the outer periphery of the wellhead casing. The sealing assembly is used to be arranged at the upper end of the wellhead casing.

5. The anti-leakage wellhead device for deep geological storage of mine water depth according to claim 4, characterized in that: The upper end of the sealing housing and the axial displacement compensation module are connected by a clamp.

6. The anti-leakage wellhead device for deep geological storage of mine water depth according to claim 4, characterized in that: The sealing assembly includes a mechanical seal element, a metal self-tightening ring and an adsorption element. The adsorption element is located below the shearing module, and the adsorption element is used to filter impurities in the mine water. The mechanical seal element is located below the adsorption element. The metal self-tightening ring is located below the mechanical seal element. A circular groove is provided on the inner wall of the sealing housing corresponding to the position of the metal self-tightening ring. The metal self-tightening ring is installed in the circular groove. The mechanical seal element is arranged corresponding to the upper end of the wellhead casing, and the metal self-tightening ring is arranged corresponding to the outer periphery of the upper end of the wellhead sleeve.

7. The anti-leakage wellhead device for deep geological storage of mine water depth according to claim 6, characterized in that: The mechanical seal element includes a stationary ring and a rotating ring. The stationary ring is located below the rotating ring, and the rotating ring is sleeved on the outer periphery of a rotating shaft. The stationary ring is connected to the inner wall of the sealing housing. The rotating shaft can drive the rotating ring to rotate. A number of grooves are provided at the lower end of the outer edge of the rotating ring. A number of diversion holes are provided at the outer edge of the stationary ring. A metal sheet is rotatably connected in each diversion hole. When the water flows from top to bottom, the metal sheet can rotate to open the diversion hole. When the water flows from bottom to top, the metal sheet can rotate to block the diversion hole.

8. The anti-leakage wellhead device for deep geological storage of mine water depth according to claim 6, characterized in that: The adsorption element is a nano-composite material layer.

9. The anti-leakage wellhead device for deep geological storage of mine water depth according to claim 4, characterized in that: The shearing module includes a connecting shaft, a fixing ring and a plurality of rotary blades. A water passing plate is arranged in the sealing housing, and the water passing plate can allow mine water to pass through. The connecting shaft is installed at the middle of the upper end of the water passing plate. The fixing ring is rotatably installed on the outer periphery of the connecting shaft. The plurality of rotary blades are evenly arranged around the outer periphery of the fixing ring, and the first end of the rotary blade is fixed to the outer wall of the fixing ring. The second end of the rotary blade extends towards the direction close to the inner wall of the sealing housing.

10. The anti-leakage wellhead device for deep geological storage of mine water depth according to claim 9, characterized in that: The shearing module further includes a fixed blade. The fixed blade is installed on the connecting shaft and is arranged around the outer periphery of the connecting shaft. The fixed blade is located below the rotary blade, and when the rotary blade rotates, it can jointly shear and crush impurities in the mine water with the fixed blade.

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