Underground gas storage well fixing device

Abstract

The utility model relates to the technical field of oil and gas well development, and discloses an underground gas storage well fixing device which comprises a driving piece, a connecting assembly, an elastic piece and a supporting mechanism. The driving part drives the supporting mechanisms to support the well wall through the connecting assemblies and the elastic parts, the multiple supporting mechanisms are arranged at intervals in the length direction of the well wall, when the well wall with different diameters is faced, the driving part drives the connecting assemblies to move, and the connecting assemblies control the supporting mechanisms to be unfolded and supported on the well wall through the elastic parts. The elastic piece can have large deformation quantity for the well wall with the small diameter, and the elastic piece can have small deformation quantity for the well wall with the large diameter so as to support well walls with different diameters, and the technical problem that in the prior art, due to the fact that well wall supporting is not comprehensive, cavities and gaps appear after collapsing impurities are doped in cement paste is solved. The technical effects that the positions with different diameters in the well wall can be supported, and the situation that the well wall collapses to affect the cement paste pouring quality is avoided are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas well development, in particular to an underground gas storage well fixing device. Background Art

[0002] At present, underground gas storage wells are widely used to store high-pressure natural gas in CNG (compressed natural gas) supply stations and urban gas peak-shaving stations. The depth of such gas storage wells is generally 50 to 200 meters, and the theoretical gap between the wellbore and the well wall is generally less than 3.0 cm. In addition, the verticality of the foundation wells opened by geological drilling is poor and the well wall is uneven. Traditional single-cylinder gas storage wells fill the gap with cement slurry during the cementing process.

[0003] In the related technology, when filling cement slurry, it is generally necessary to support the well wall. Since different positions of the well wall are prone to collapse and the materials at different positions are different, it is easy to cause inconsistent diameters at different parts of the well wall. The use of a uniformly expanded stabilizer cannot directly contact the well wall at the larger diameter, resulting in the cement slurry poured into the foundation well being mixed with collapsed impurities and forming voids and gaps. Groundwater will penetrate into the outer surface of the wellbore through the voids or gaps, causing local corrosion on the outer surface of the wellbore, affecting the service life of the wellbore. Utility Model Content

[0004] The utility model aims to provide an underground gas storage well fixing device to solve the technical problem in the prior art that the well wall support is not comprehensive, resulting in cavities and gaps after the cement slurry is mixed with collapse impurities.

[0005] In order to solve the above technical problems, the utility model provides an underground gas storage well fixing device for supporting the well wall, comprising a driving member, a connecting assembly, an elastic member and a supporting mechanism;

[0006] There are multiple support mechanisms, one side of each support mechanism is provided with an elastic member, each support mechanism is connected to the connecting component via an elastic member, and the connecting component is connected to the driving member.

[0007] In an optional embodiment, the support mechanism includes a sliding ring, a rotating plate and a connecting sleeve;

[0008] The sliding ring is arranged on the connecting sleeve and is respectively slidably connected with the connecting sleeve and the rotating plate. There are multiple rotating plates, which are arranged at intervals along the circumference of the connecting sleeve, and each rotating plate is rotatably connected with the connecting sleeve.

[0009] In an optional embodiment, the rotating plate is provided with an inclined surface;

[0010] The inclined surface is slidably connected to the sliding ring, and the distance between the inclined surface and the connecting sleeve is arranged to decrease along a direction approaching the driving member.

[0011] In an optional embodiment, further comprising a wellbore;

[0012] A plurality of the wellbores are provided, and the plurality of the wellbores are arranged at intervals along the length direction of the well wall, and adjacent wellbores are connected by the connecting sleeve.

[0013] In an optional embodiment, the connection assembly includes a lifting frame and a lifting grouting pipe;

[0014] The lifting frame is connected to the lifting grouting pipe and the driving member respectively. The lifting grouting pipe is extended along the length direction of the well wall. The lifting grouting pipe is connected to the sliding ring and the elastic member respectively.

[0015] In an optional embodiment, a connecting piece is provided on the pulling grouting pipe, and the pulling grouting pipe is connected to the elastic piece via the connecting piece.

[0016] In an optional embodiment, a mounting ring is also included;

[0017] The mounting ring is sleeved on the end surface of the well wall, and the mounting ring is connected to the driving member.

[0018] In an optional embodiment, a sliding cover is provided on the mounting ring;

[0019] The sliding cover is arranged on a step on one side of the mounting ring and is clamped with the mounting ring, and the surface of the sliding cover is flush with the surface of the mounting ring.

[0020] In an optional embodiment, a detachable sealing cover is provided on the sliding cover, a through-vent hole is provided on the sliding cover, and the sealing cover is connected to the vent hole.

[0021] In an optional embodiment, a weight is also included;

[0022] The weight is arranged on the sliding cover, a channel is arranged on the weight, and the connecting component passes through the weight through the channel.

[0023] The utility model provides an underground gas storage well fixing device, comprising a driving member, a connecting assembly, an elastic member and a supporting mechanism; the driving member drives the supporting mechanism to support the well wall through the connecting assembly and the elastic member, and a plurality of supporting mechanisms are arranged at intervals along the length direction of the well wall. When facing well walls of different diameters, the driving member drives the connecting assembly to move, and the connecting assembly controls the supporting mechanism to unfold and support the well wall through the elastic member. When facing well walls with smaller diameters, the elastic member can have a larger deformation amount, and when facing well walls with larger diameters, the elastic member can have a smaller deformation amount, so as to meet the support of well walls with different diameters, solve the technical problem in the prior art that incomplete well wall support leads to the appearance of voids and gaps after cement slurry is mixed with collapse impurities, and achieves the technical effect that different diameters in the well wall can be supported, the well wall collapse is avoided to affect the quality of cement slurry pouring, the cement slurry is more compacted, and groundwater is avoided from contacting the inside through the cement slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the underground gas storage well fixing device mentioned in the embodiment of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the weight mentioned in the embodiment of the utility model;

[0026] Figure 3 This is another structural schematic diagram of the weight mentioned in the embodiment of the utility model.

[0027] In the figure, 1-driving member; 2-elastic member; 3-sliding ring; 4-rotating plate; 5-connecting sleeve; 6-inclined surface; 7-wellbore; 8-well wall; 9-lifting frame; 10-lifting grouting pipe; 11-installing ring; 12-sliding cover; 13-sealing cover; 14-weight. DETAILED DESCRIPTION

[0028] The following is a further detailed description of the specific implementation of the present utility model in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the related art, when filling cement slurry, it is generally necessary to support the well wall. Since different positions of the well wall are prone to collapse and the materials of different positions of the well wall are different, it is easy to cause inconsistent diameters at different parts of the well wall. When a uniformly expanded stabilizer is used for well wall support, it is impossible to directly contact the well wall at the larger diameter part, resulting in the cement slurry poured into the foundation well being mixed with collapsed impurities and forming voids and gaps. Groundwater will penetrate into the outer surface of the wellbore through the voids or gaps, causing local corrosion on the outer surface of the wellbore, affecting the service life of the wellbore.

[0031] In view of this, if Figure 1-Figure 3 As shown, some embodiments of the utility model provide an underground gas storage well fixing device for supporting a well wall 8, comprising a driving member 1, a connecting assembly, an elastic member 2 and a supporting mechanism; a plurality of supporting mechanisms are provided, an elastic member 2 is provided on one side of each supporting mechanism, each supporting mechanism is connected to the connecting assembly via an elastic member 2, and the connecting assembly is connected to the driving member 1.

[0032] In the above embodiment, if Figure 1 As shown, the driving member 1 can be a cylinder, and the driving member 1 can be vertically arranged along the altitude direction. There can be two driving members 1 or multiple driving members 1. The multiple cylinders are arranged at intervals along the circumference of the end surface above the well wall 8. Each driving member 1 is connected to a connecting component, and the connecting component can be extended and arranged along the axial direction of the well wall 8. The connecting component can be connected to multiple supporting mechanisms, wherein the connecting mechanism can be slidably connected to the supporting mechanism. The multiple supporting mechanisms are arranged at intervals along the axial direction of the well wall 8. The connecting component can be transmission-connected to each supporting mechanism through multiple elastic members 2, so that each supporting mechanism can be unfolded and supported on the well wall 8 under the action of the elastic member 2. In well walls 8 with different diameters, multiple elastic members 2 with different degrees of compression can be used to meet the different degrees of expansion of the supporting mechanism, so that multiple supporting mechanisms can be supported on well walls 8 with different diameters.

[0033] Some embodiments of the utility model provide an underground gas storage well fixing device, including a driving member 1, a connecting assembly, an elastic member 2 and a supporting mechanism; the driving member 1 drives the supporting mechanism to support the well wall 8 through the connecting assembly and the elastic member 2, and multiple supporting mechanisms are arranged at intervals along the length direction of the well wall 8. When facing well walls 8 of different diameters, the driving member 1 drives the connecting assembly to move, and the connecting assembly controls the supporting mechanism to unfold and support on the well wall 8 through the elastic member 2. When facing the well wall 8 with a smaller diameter, the elastic member 2 can have a larger deformation amount, and when facing the well wall 8 with a larger diameter, the elastic member 2 can have a smaller deformation amount, so as to meet the support of well walls 8 with different diameters, solve the technical problem of incomplete support of the well wall 8 in the prior art, resulting in voids and gaps after the cement slurry is mixed with collapse impurities, and achieve the technical effect of supporting different diameters in the well wall 8 and avoiding the collapse of the well wall 8 that affects the quality of cement slurry pouring.

[0034] In some optional embodiments, the supporting mechanism includes a sliding ring 3, a rotating plate 4 and a connecting sleeve 5; the sliding ring 3 is sleeved on the connecting sleeve 5 and is slidingly connected to the connecting sleeve 5 and the rotating plate 4 respectively, and a plurality of rotating plates 4 are provided, and the plurality of rotating plates 4 are arranged at intervals along the circumference of the connecting sleeve 5, and each rotating plate 4 is rotatably connected to the connecting sleeve 5.

[0035] In the above embodiment, the connecting sleeve 5 can be a circular metal ring, and a plurality of rotating plates 4 are arranged on the outer wall of the connecting sleeve 5. The plurality of rotating plates 4 are evenly arranged along the circumference of the connecting sleeve 5. Each rotating plate 4 is rotatably connected to the connecting sleeve 5 by means of a pin shaft, so that each rotating plate 4 can rotate relative to the connecting sleeve 5, so that each rotating plate 4 is close to or away from the well wall 8, and the well wall 8 is supported. The sliding ring 3 is sleeved on the connecting sleeve 5, such as Figure 1 As shown, the sliding ring 3 can also be set as a metal ring in the shape of a circular ring, the inner diameter of the sliding ring 3 is larger than the outer diameter of the connecting sleeve 5, the sliding ring 3 is slidably connected to the connecting sleeve 5, the sliding ring 3 is set below the connection point between the rotating plate 4 and the connecting sleeve 5, and the side of the sliding ring 3 away from the connecting sleeve 5 abuts against each rotating plate 4, so that when the sliding ring 3 reciprocates along the axial direction of the well wall 8, the sliding ring 3 can drive multiple rotating plates 4 to rotate relative to the connecting sleeve 5, and the expansion and contraction of multiple rotating plates 4 are completed. When support is needed, the sliding ring 3 moves upward under the action of the driving member 1 and the connecting component. At this time, the sliding ring 3 drives multiple rotating plates 4 to rotate relative to the connecting sleeve 5 and makes each rotating plate 4 abut against the well wall 8, and the support for the well wall 8 is completed.

[0036] Optionally, the elastic member 2 can be a spring, and the two ends of the elastic member 2 are respectively connected to the connecting assembly and the sliding ring 3. When the driving member 1 drives the connecting assembly to move, the connecting assembly drives each elastic member 2 to move, and each elastic member 2 drives each sliding ring 3 to move relative to each connecting sleeve 5, so that the multiple rotating plates 4 on each connecting sleeve 5 begin to flip and support on the well wall 8. At the same time, the driving member 1 can apply excessive driving force, so that the connecting assembly drives the multiple elastic members 2 to be compressed and squeezed on the multiple sliding rings 3. When the sliding rings 3 start to squeeze the rotating plates 4, due to the different diameters of the well wall 8, each connecting sleeve 5 The rotation angles of the rotating plate 4 on the sleeve 5 are different. The rotation amplitude of the rotating plate 4 at the well wall 8 with a smaller diameter is also smaller. At this time, the corresponding sliding distance of the sliding ring 3 is also smaller. Correspondingly, the rotation amplitude of the rotating plate 4 at the well wall 8 with a larger diameter is larger. At this time, the corresponding sliding distance of the sliding ring 3 is also larger. Pressure is applied to the sliding rings 3 with different moving distances through the elastic member 2. When the sliding distance of the sliding ring 3 is smaller, the elastic member 2 can have a larger compression stroke, and when the sliding distance of the elastic member 2 is larger, the elastic member 2 can have a smaller compression stroke, thereby meeting the support requirements in the well walls 8 with different diameters.

[0037] In some optional embodiments, a slope 6 is provided on the rotating plate 4 ; the slope 6 is slidably connected to the sliding ring 3 , and the distance between the slope 6 and the connecting sleeve 5 is gradually reduced along the direction approaching the driving member 1 .

[0038] In the above embodiment, the side of the rotating plate 4 close to the connecting sleeve 5 may be provided with an inclined surface 6, and the inclined surface 6 may be in an arc shape or a plane shape, such as Figure 1 As shown, the inclined surface 6 can be an arc with its center facing the axis of the well wall 8, or the inclined surface 6 can be a plane where the thickness of the rotating plate 4 increases gradually along the direction approaching the driving member 1. By setting the inclined surface 6, the rotating plate 4 can be rotated at a larger angle, and the rotating plate 4 can be more easily abutted against the well wall 8.

[0039] In some optional embodiments, a wellbore 7 is further included; a plurality of wellbores 7 are provided, and the plurality of wellbores 7 are arranged at intervals along the length direction of the well wall 8 , and adjacent wellbores 7 are connected by connecting sleeves 5 .

[0040] In the above embodiment, the wellbore 7 can be in the shape of a metal cylinder with a hollow interior. There can be multiple wellbores 7 with their axes arranged in a coincident manner. Two adjacent wellbores 7 can be connected via a connecting sleeve 5, wherein an internal thread can be provided inside the connecting sleeve 5 and external threads can be provided on both sides of the wellbore 7. Adjacent wellbores 7 can be threadedly connected via the connecting sleeve 5 to meet the working requirements of well walls 8 at different depths.

[0041] In some optional embodiments, the connecting assembly includes a lifting frame 9 and a lifting grouting pipe 10; the lifting frame 9 is connected to the lifting grouting pipe 10 and the driving member 1 respectively, the lifting grouting pipe 10 is extended along the length direction of the well wall 8, and the lifting grouting pipe 10 is connected to the sliding ring 3 and the elastic member 2 respectively.

[0042] In the above embodiment, the lifting frame 9 and the lifting grouting pipe 10 can be made of metal material, such as Figure 1 As shown, the lifting frame 9 can be arranged above the well wall 8 and connected to each driving member 1. The lifting frame 9 can be arranged perpendicular to the axis of the well wall 8. A plurality of lifting grouting pipes 10 can be provided. The plurality of lifting grouting pipes 10 are arranged at intervals along the circumference of the wellbore 7. Each lifting grouting pipe 10 is connected to a plurality of sliding rings 3 through a plurality of elastic members 2, and each lifting grouting pipe 10 is connected to the lifting frame 9, so that the driving member 1 can drive the elastic members 2 and the sliding rings 3 through the lifting frame 9 and the lifting grouting pipe 10. Furthermore, the lifting grouting pipe 10 is hollow inside and is used to inject cement slurry between the well wall 8 and the wellbore 7.

[0043] In some optional embodiments, a connecting piece is provided on the pulling grouting pipe 10, and the pulling grouting pipe 10 is connected to the elastic piece 2 via the connecting piece.

[0044] In the above embodiment, the connecting member may include a pin, the connecting member is vertically arranged on the outer surface of the lifting grouting pipe 10, the connecting member can be connected to the lifting grouting pipe 10 by threading, and can also be connected to the lifting grouting pipe 10 by welding, the connecting member abuts against one end of the elastic member 2, and the other end of the elastic member 2 abuts against the sliding ring 3, so that Figure 1 In the direction shown, when the driving member 1 extends upward, the lifting frame 9 drives the grouting pipe 10 to move upward. At this time, the connecting member begins to move upward with the elastic member 2 and the sliding ring 3 until the elastic member 2 is squeezed, and the connecting member ensures a firm connection with the elastic member 2.

[0045] In some optional embodiments, a mounting ring 11 is further included; the mounting ring 11 is sleeved on the end surface of the well wall 8 , and the mounting ring 11 is connected to the driving member 1 .

[0046] In the above embodiment, the mounting ring 11 can be made of metal. The mounting ring 11 is arranged as follows: Figure 1 On the upper end surface of the well wall 8 shown, the mounting ring 11 can be buckled on the well wall 8 and fixedly connected to the well wall 8, a platform is arranged above the mounting ring 11, and the mounting ring 11 can be arranged in a circular shape, and a plurality of driving members 1 can be evenly arranged on the platform on the upper surface of the mounting ring 11 along the circumferential direction of the well wall 8, so that the two ends of the plurality of driving members 1 are respectively connected to the mounting ring 11 and the lifting frame 9. The mounting ring 11 is used to fix the end surface of the well wall 8 to prevent the opening of the well wall 8 from collapsing, and can provide a contact platform for the driving member 1.

[0047] In some optional embodiments, a sliding cover 12 is provided on the mounting ring 11 ; the sliding cover 12 is provided on a step on one side of the mounting ring 11 and is clamped with the mounting ring 11 , and the surface of the sliding cover 12 is flush with the surface of the mounting ring 11 .

[0048] In the above embodiment, the mounting ring 11 and the sliding cover 12 can both be made of metal. The mounting ring 11 is annular, that is, a through hole is provided at the center of the mounting ring 11, a step is provided on the upper end surface of the mounting ring 11, and the concave direction of the step is set away from the lifting frame 9. The step is provided with a sliding cover 12 buckled on the mounting ring 11, and the sliding cover 12 is slidably connected to the mounting ring 11, and the sliding cover 12 is embedded in the step, so that Figure 1 The upper end surface of the sliding cover 12 is flush with the upper end surface of the mounting ring 11, and the sliding cover 12 is used to better seal the gas storage well. At the same time, the step can make the surface of the sliding cover 12 and the mounting ring 11 smooth and more beautiful.

[0049] In some optional embodiments, a detachable sealing cover 13 is provided on the sliding cover 12 , a through-going air hole is provided on the sliding cover 12 , and the sealing cover 13 is connected to the air hole.

[0050] In the above embodiment, the sliding cover 12 is provided with an air hole, and the sealing cover 13 is covered on the air hole. The sealing cover 13 is detachably connected to the air hole. When pouring cement mortar, in order to increase the pouring efficiency and avoid the formation of cavities, the sealing cover 13 can be opened to balance the internal and external pressures. After pouring the sealing cover 13, the sealing cover 13 can be covered on the air hole to maintain pressure, so that the cast cement mortar is more compact.

[0051] In some optional embodiments, a weight 14 is further included; the weight 14 is disposed on the sliding cover 12, a channel is disposed on the weight 14, and the connecting component is disposed through the weight 14 via the channel.

[0052] In the above embodiment, the weight 14 can be crescent-shaped, the weight 14 can be cylindrical, an opening can be set on one side of the weight 14, the weight 14 can be made of metal, and can also be cast by cement. After the cement casting is completed and the pressure needs to be maintained, the weight 14 can be pressed on the sliding cover 12 covered with the sealing cover 13, and the weight 14 provides a clamping force to the sliding cover 12, and the grouting pipe 10 is pulled through the weight 14 and the sliding cover 12 respectively and then enters the gas storage well.

[0053] Optionally, a plurality of weights 14 may be provided, and the plurality of weights 14 may be relatively stacked on the sliding cover 12. When the plurality of weights 14 are stacked, the channels are connected.

[0054] When using, first Figure 1 The mounting ring 11 is fixed on the upper part of the well wall 8 shown in the figure, and then the wellbore 7, the connecting sleeve 5, the elastic member 2, the sliding ring 3, the rotating plate 4, the lifting grouting pipe 10 and the sliding cover 12 assembly are inserted into the well wall 8, so that the sliding cover 12 is fixed on the step of the mounting ring 11, and then the lifting frame 9 is connected to the end of the lifting grouting pipe 10 extending out of the gas storage well, and the grouting pump is connected to the end face of the lifting grouting pipe 10 close to the lifting frame 9, and then the two driving members 1 are installed on the upper surface of the mounting ring 11 and fixed along the diameter direction of the mounting ring 11, and then the driving ends of the two driving members 1 are fixed on the lifting frame 9, and the two driving members 1 are operated to extend upward synchronously, and the two driving members 1 drive the lifting frame 9 to rise, and the lifting frame 9 drives the lifting grouting pipe 10 to rise, and the lifting grouting pipe 10 drives the multiple elastic members 2 to rise through the multiple connecting members arranged on the surface, and the elastic The elastic member 2 pushes the multiple sliding rings 3 to rise, and the sliding rings 3 push the multiple rotating plates 4 to rotate relative to the connecting sleeve 5, so that the multiple rotating plates 4 are supported on the well wall 8 after expansion. Under the action of the elastic member 2, when the diameter of the well wall 8 is different, the different degrees of compression of the elastic member 2 can push the sliding ring 3 to move different distances, thereby driving the multiple rotating plates 4 to expand to different angles, thereby solving the support problem of different diameters along the length direction in the same well wall 8, and then open the sealing cover 13, and grouting is carried out by pulling the grouting pipe 10. When the grouting is about to overflow from the sealing cover 13, close the sealing cover 13, continue grouting, and then the sliding cover 12 rises under the grouting pressure, and then add weights 14 to the sliding cover 12. Under the action of the weights 14, the sliding cover 12 presses the grouting downward, so that the grouting concrete in the well wall 8 is dense and the cementing strength is increased.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An underground gas storage well fixing device for supporting a well wall, characterized in that: It includes a driving member, a connecting assembly, an elastic member and a supporting mechanism; There are multiple support mechanisms, one side of each support mechanism is provided with an elastic member, each support mechanism is connected to the connecting component via an elastic member, and the connecting component is connected to the driving member.

2. The underground gas storage well fixing device according to claim 1, characterized in that: The supporting mechanism comprises a sliding ring, a rotating plate and a connecting sleeve; The sliding ring is arranged on the connecting sleeve and is respectively slidably connected with the connecting sleeve and the rotating plate. There are multiple rotating plates, which are arranged at intervals along the circumference of the connecting sleeve, and each rotating plate is rotatably connected with the connecting sleeve.

3. The underground gas storage well fixing device according to claim 2, characterized in that: The rotating plate is provided with an inclined surface; The inclined surface is slidably connected to the sliding ring, and the distance between the inclined surface and the connecting sleeve is arranged to decrease along a direction approaching the driving member.

4. The underground gas storage well fixing device according to claim 2, characterized in that: It also includes wellbores; A plurality of the wellbores are provided, and the plurality of the wellbores are arranged at intervals along the length direction of the well wall, and adjacent wellbores are connected by the connecting sleeve.

5. The underground gas storage well fixing device according to claim 2, characterized in that: The connection assembly includes a lifting frame and a lifting grouting pipe; The lifting frame is connected to the lifting grouting pipe and the driving member respectively. The lifting grouting pipe is extended along the length direction of the well wall. The lifting grouting pipe is connected to the sliding ring and the elastic member respectively.

6. The underground gas storage well fixing device according to claim 5, characterized in that: The lifting grouting pipe is provided with a connecting piece, and the lifting grouting pipe is connected to the elastic piece through the connecting piece.

7. The underground gas storage well fixing device according to claim 1, characterized in that: Also included is a mounting ring; The mounting ring is sleeved on the end surface of the well wall, and the mounting ring is connected to the driving member.

8. The underground gas storage well fixing device according to claim 7, characterized in that: The mounting ring is provided with a sliding cover; The sliding cover is arranged on a step on one side of the mounting ring and is clamped with the mounting ring, and the surface of the sliding cover is flush with the surface of the mounting ring.

9. The underground gas storage well fixing device according to claim 8, characterized in that: The sliding cover is provided with a detachable sealing cover, the sliding cover is provided with a penetrating air hole, and the sealing cover is connected with the air hole.

10. The underground gas storage well fixing device according to claim 8, characterized in that: Also includes weights; The weight is arranged on the sliding cover, a channel is arranged on the weight, and the connecting component passes through the weight through the channel.

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