Geothermal well completion quality monitoring system

Abstract

The invention relates to a geothermal well completion quality monitoring system, and relates to the technical field of geothermal well detection, the geothermal well completion quality monitoring system comprises a quality monitoring device, the quality monitoring device comprises a mobile vehicle, the rear end of the mobile vehicle is provided with a loading platform, and the loading platform is provided with an angle adjusting mechanism; a hoisting mechanism used for hoisting the monitoring mechanism is arranged in the angle adjusting mechanism, an emergency braking assembly is arranged in the hoisting mechanism, and the angle adjusting mechanism moves the detection mechanism to the position over the geothermal well by adjusting the angle and keeps the appropriate farthest distance between the detection mechanism and the geothermal well. According to the geothermal well protection device, through the dual mechanisms of active braking and passive protection, the shutdown maintenance cost caused by equipment damage or accidents is reduced; and meanwhile, the subsequent development risk caused by the fact that the well completion quality problem is not found in time is reduced, personnel injury and property loss are avoided, and the safety and stability of well completion quality monitoring of the geothermal well are enhanced.

Description

Technical Field

[0001] This application relates to the technical field of geothermal well detection, and in particular to a monitoring system for the completion quality of geothermal wells. Background Art

[0002] During the development of geothermal energy, the construction quality of geothermal wells directly affects the exploitation efficiency of geothermal resources and the environmental impact.

[0003] Existing geothermal well quality monitoring systems need to regularly use quality detection devices to be lowered into geothermal wells for comprehensive detection of geothermal wells. Manual lowering cannot complete the operation. Relying on mechanical equipment has the risk of accidents such as the quality detection device falling, and it is not convenient to move the detection equipment, and the safety and stability during detection are not strong enough.

[0004] Therefore, in view of the above current situation, there is an urgent need to develop a monitoring system for the completion quality of geothermal wells to overcome the current practical deficiencies. Summary of the Invention

[0005] In order to solve the defects in the above technology, this application provides a monitoring system for the completion quality of geothermal wells.

[0006] A monitoring system for the completion quality of geothermal wells provided by this application adopts the following technical solutions: A monitoring system for the completion quality of geothermal wells includes a quality monitoring device. The quality detection device includes a mobile vehicle. A loading platform is arranged at the rear end of the mobile vehicle. An angle adjustment mechanism for changing the monitoring position is arranged on the loading platform. A hoisting mechanism for hoisting the monitoring mechanism is arranged inside the angle adjustment mechanism. An emergency braking assembly for preventing the monitoring mechanism from falling is arranged inside the hoisting mechanism.

[0007] Optionally, the angle adjustment mechanism includes a driving motor I. The driving motor I is fixedly arranged on the top of the loading platform. A bevel gear I is fixedly arranged at the driving end of the driving motor I. A rotating column with tooth patterns on its outer surface is rotatably arranged on the loading platform. The bevel gear I is in meshing transmission with the rotating column. A rotating table is fixedly arranged at the top of the rotating column. A protective cover is arranged outside the rotating table. The bottom of the protective cover is fixedly connected to the top of the loading platform.

[0008] Optionally, a support arm I is fixedly arranged at the top of the rotating table. A support arm II is rotatably arranged at the top of the support arm I. One side of the support arm I is hinged to the base of a hydraulic cylinder. The telescopic end of the hydraulic cylinder is hinged to the bottom of the support arm II.

[0009] Optionally, the lifting mechanism includes a fixed cavity and a movable cavity. The fixed cavity and the movable cavity are formed inside the second support arm. A wire passing cavity I is formed inside the fixed cavity and the movable cavity. A cable winding and unwinding machine is fixedly arranged inside the fixed cavity. An extension arm is inserted inside the movable cavity. A driving assembly for driving the extension arm to extend and retract inside the movable cavity is arranged at the top of the second support arm. A limiting groove I is formed at the bottom of the movable cavity. A limiting block I for horizontally sliding inside the limiting groove I is arranged at the bottom of the extension arm. An extension cavity is formed inside the extension arm. A wire passing cavity II is formed on one side of the extension arm facing the fixed cavity. The wire passing cavity I is communicated with the wire passing cavity II. A guiding wheel is fixedly arranged inside the extension cavity. A rolling wheel is rotatably arranged inside the extension cavity. The steel cable released from the cable winding and unwinding machine passes through the wire passing cavity I and the wire passing cavity II. The steel cable bypasses from the bottom of the guiding wheel and the top of the rolling wheel respectively. A monitoring mechanism is arranged at the free end of the steel cable.

[0010] Optionally, the driving assembly includes a second driving motor. The second driving motor is fixedly arranged at the top of the second support arm. A spur gear is fixedly arranged at the driving end of the second driving motor. A through groove is formed at the top of the movable cavity. Tooth patterns are arranged at the top of the extension arm. The spur gear meshes with the top of the extension arm.

[0011] Optionally, the emergency braking assembly includes a constraint cavity. The constraint cavity is formed at the bottom of the guiding wheel. A strong spring and a push head are arranged inside the constraint cavity. The top of the strong spring is connected with the top of the constraint cavity. The bottom of the strong spring is connected with the top of the push head. A rotating head is rotatably arranged inside the bottom of the push head. The rotating head abuts against the steel cable. A first limiting post and a second limiting post are respectively fixedly arranged at the top and the bottom of the extension cavity. A liquid passing cavity is formed inside the bottom of the extension cavity and the second limiting post. The liquid passing cavity is filled with lubricating oil. A push plug is arranged at one end of the liquid passing cavity. The push plug is arranged directly below the rotating head. The bottom of the push plug is connected with one end of a buffer spring. The other end of the buffer spring is connected with the bottom of the liquid passing cavity. A push post is inserted inside the other end of the liquid passing cavity. Limiting grooves II are respectively arranged at both ends on the inner wall of the liquid passing cavity. Limiting blocks II for vertically sliding inside the limiting grooves II are respectively arranged at both ends of the push post. An inclined pressure head is arranged at the top of the push post. A semi-sheath is arranged at the bottom of the first limiting post. A pressure groove corresponding to the inclined pressure head is formed inside the semi-sheath.

[0012] Optionally, the bottom of the push post is beveled.

[0013] Optionally, a scraper is arranged on the bottom surface of the extension cavity below the steel cable.

[0014] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present invention realizes full - process automation: from angle adjustment, steel cable retraction and extension to emergency braking, all are achieved through the linkage of motors, hydraulics and machinery to realize automatic control, reducing manual intervention; 2. The present invention has high safety: a dual - braking mechanism and a buffer design ensure the safety of equipment and personnel in case of steel cable breakage or stall; 3. The present invention has strong adaptability: modular extension arms and multi - directional angle adjustment capabilities are adapted to different well depths, well diameters and complex terrain requirements; 4. The present invention can achieve low maintenance costs: a self - lubricating system and a scraper cleaning design reduce equipment wear and extend the service life of key components. Description of the Drawings

[0015] Figure 1 is the overall structural schematic diagram provided by the embodiment of the present invention; Figure 2 is the sectional structural schematic diagram of the angle adjustment mechanism provided by the embodiment of the present invention; Figure 3 is Figure 2 the structural schematic diagram of part A in

[0016] Description of the Reference Numerals in the Drawings: 1, mobile vehicle; 2, load - carrying platform; 3, angle adjustment mechanism; 31, driving motor 1; 32, bevel gear; 33, rotating column; 34, rotating table; 35, protective cover; 36, support arm 1; 361, driving motor 2; 362, spur gear; 363, through - slot; 37, support arm 2; 38, hydraulic cylinder; 4, lifting mechanism; 41, fixed cavity; 42, movable cavity; 421, first limit groove; 43, first wire - passing cavity; 44, cable retractor; 45, steel cable; 46, extension arm; 461, first limit block; 47, extension cavity; 48, second wire - passing cavity; 49, guide wheel; 50, rolling wheel; 6, monitoring mechanism; 7, emergency braking assembly; 71, restraint cavity; 72, strong spring; 73, push head; 74, rotating head; 75, first limit post; 76, second limit post; 77, liquid - passing cavity; 771, second limit groove; 78, push plug; 79, push column; 791, second limit block; 80, inclined pressure head; 81, semi - sheath; 82, pressure groove; 83, buffer spring; 84, scraper; 9, geothermal well. Detailed Embodiments

[0017] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present invention belong to the scope of protection of the present invention.

[0018] In addition, in the present invention, descriptions such as "first", "second", etc. are only for descriptive purposes, and do not particularly refer to the meaning of order or sequence, nor are they used to limit the present invention. They are merely used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0019] The present invention provides the following embodiments Embodiment 1 An embodiment of the present application discloses a quality monitoring system for a geothermal well completion, as Figures 1 - 3 shown, including a quality monitoring device. The quality detection device includes a mobile vehicle 1. A load platform 2 is provided at the rear end of the mobile vehicle 1. An angle adjustment mechanism 3 for changing the monitoring position is provided on the load platform 2. A hoisting mechanism 4 for hoisting a monitoring mechanism 6 is provided inside the angle adjustment mechanism 3. An emergency braking assembly 7 for preventing the monitoring mechanism 6 from falling is provided inside the hoisting mechanism 4.

[0020] The working principle and beneficial effects of the above technical solution are as follows: The mobile vehicle 1 in the quality detection device facilitates moving the detection mechanism to the nearest side of the geothermal well 9 to be detected, facilitating the flexibility and stability of quality detection. The load platform 2 on the mobile vehicle 1 supports the angle adjustment mechanism 3. The angle mechanism moves the detection mechanism directly above the geothermal well 9 by adjusting the angle and maintains an appropriate maximum distance between the two. The hoisting mechanism 4 is responsible for adjusting the vertical distance between the detection mechanism and the geothermal well 9. The emergency braking assembly 7 is in a standby state throughout the process. When an accident occurs during hoisting of the steel cable 45 in the hoisting mechanism 4, the emergency braking assembly 7 performs emergency braking on the steel cable 45 in the hoisting mechanism 4 to prevent the detection mechanism from falling out of control, thereby damaging the detection mechanism or the geothermal well 9. Through the dual mechanisms of active braking and passive protection, the present invention reduces the shutdown and maintenance costs caused by equipment damage or accidents, and at the same time reduces the subsequent development risks caused by the failure to detect well completion quality problems in a timely manner, avoiding personal injuries and property losses, and enhancing the safety and stability of the quality monitoring of the geothermal well 9 completion.

[0021] Embodiment 2 Based on Embodiment 1, as Figures 1 - 3As shown in the figure, the angle adjustment mechanism 3 includes a first driving motor 31, the first driving motor 31 is fixedly arranged on the top of the load platform 2, a bevel gear 32 is fixedly arranged at the driving end of the first driving motor 31, a rotating column 33 with tooth patterns on its outer surface is rotatably arranged on the load platform 2, the bevel gear 32 is in meshing transmission with the rotating column 33, a rotating table 34 is fixedly arranged at the top of the rotating column 33, a protective cover 35 is arranged outside the rotating table 34, and the bottom of the protective cover 35 is fixedly connected with the top of the load platform 2.

[0022] The working principle and beneficial effects of the above technical solution are as follows: The load platform 2 supports and fixes the first driving motor 31 and the protective cover 35. The first driving motor 31 drives the bevel gear 32 to rotate. The load platform 2 rotatably supports the rotating column 33. The first driving motor 31 drives the rotating column 33 to rotate by meshing the bevel gear 32 with the tooth patterns on the surface of the rotating column 33, so as to adjust the rotation angle of the rotating column 33. The rotating column 33 supports and fixes the rotating table 34. The protective cover 35 protects the first driving motor 31 and the rotating column 33, preventing foreign objects in the outside world from obstructing the transmission and affecting it, and reducing unnecessary losses of the transmission.

[0023] Embodiment 3 On the basis of Embodiment 2, as Figures 1 - 3 shown in the figure, a first support arm 36 is fixedly arranged on the top of the rotating table 34, a second support arm 37 is rotatably arranged on the top of the first support arm 36, one side of the first support arm 36 is hinged to the base of the hydraulic cylinder 38, and the telescopic end of the hydraulic cylinder 38 is hinged to the bottom of the second support arm 37.

[0024] The working principle and beneficial effects of the above technical solution are as follows: The rotating table 34 fixedly supports the first support arm 36, and the first support arm 36 rotates synchronously with the rotating table 34. The first support arm 36 is rotatably connected to the second support arm 37. The side wall of the first support arm 36 is hinged to the base of the hydraulic cylinder 38, and the bottom of the second support arm 37 is hinged to the telescopic end of the hydraulic cylinder 38. By controlling the telescopic movement of the hydraulic cylinder 38, the angle between the second support arm 37 and the first support arm 36 can be adjusted, facilitating the adjustment of the relative position between the detection mechanism and the geothermal well 9.

[0025] Embodiment 4 On the basis of Embodiment 3, as Figures 1 - 3As shown, the hoisting mechanism 4 includes a fixed cavity 41 and a movable cavity 42. The fixed cavity 41 and the movable cavity 42 are provided in the second support arm 37. A first wire passing cavity 43 is provided in the fixed cavity 41 and the movable cavity 42. A cable winding and unwinding machine 44 is fixedly arranged in the fixed cavity 41. An extension arm 46 is inserted into the movable cavity 42. A driving assembly for driving the extension arm 46 to expand and contract in the movable cavity 42 is arranged at the top of the second support arm 37. A first limiting groove 421 is provided at the bottom of the movable cavity 42. A first limiting block 461 for sliding horizontally in the first limiting groove 421 is arranged at the bottom of the extension arm 46. An extension cavity 47 is provided in the extension arm 46. A second wire passing cavity 48 is provided on the side of the extension arm 46 facing the fixed cavity 41. The first wire passing cavity 43 is communicated with the second wire passing cavity 48. A guide wheel 49 is fixedly arranged in the extension cavity 47. A rolling wheel 50 is rotatably arranged in the extension cavity 47. The steel cable 45 released from the cable winding and unwinding machine 44 passes through the first wire passing cavity 43 and the second wire passing cavity 48. The steel cable 45 bypasses the bottom of the guide wheel 49 and the top of the rolling wheel 50 respectively. A monitoring mechanism 6 is arranged at the free end of the steel cable 45; The driving assembly includes a second driving motor 361. The second driving motor 361 is fixedly arranged at the top of the second support arm 37. A spur gear 362 is fixedly arranged at the driving end of the second driving motor 361. A through groove 363 is provided at the top of the movable cavity 42. A tooth pattern is arranged at the top of the extension arm 46. The spur gear 362 meshes with the top of the extension arm 46.

[0026] The working principle and beneficial effects of the above technical solution are as follows: The fixed cavity 41 fixes the cable reel 44 to ensure that the cable reel 44 winds and unwinds the steel cable 45 stably without interference. The movable cavity 42 limits the vertical movement of the extension arm 46 to ensure that the extension arm 46 moves along the length direction of the second support arm 37. The driving assembly drives and controls the extension and retraction of the extension arm 46. The top of the second support arm 37 fixedly supports the second driving motor 361. The second driving motor 361 controls the forward and reverse rotation of the spur gear 362. When the spur gear 362 rotates forward and backward, it drives the extension arm 46 to expand and contract along the length direction of the second support arm 37 in the movable cavity 42, thereby controlling the lengths of the second support arm 37 and the extension arm 46 to meet the requirements of different wellhead distances and avoid manual adjustment errors. The first limiting block 461 provided at the bottom of the extension arm 46 is engaged by the first limiting groove 421 to prevent the extension arm 46 from slipping in the movable cavity 42 and affecting the safety of personnel and equipment. The first cable passing cavity 43 and the second cable passing cavity 48 avoid the steel cable 45 released by the cable reel 44 and do not affect the movement of the steel cable 45. The guide wheel 49 guides the moving direction of the steel cable 45, and the rolling wheel 50 changes the moving direction of the steel cable 45. Lower the monitoring mechanism to the target depth. The weight of the monitoring mechanism 6 keeps the steel cable 45 in a taut state and in contact with the bottom of the guide wheel 49 and the top of the rolling wheel 50. The double guidance of the guide wheel 49 and the rolling wheel 50 ensures the moving direction of the steel cable 45, reduces the wear of the steel cable 45, and extends the service life of the steel cable 45.

[0027] Embodiment 5 Based on Embodiment 4, as Figures 1 - 2 shown, as Figures 1 - 3As shown, the emergency braking assembly 7 includes a restraint cavity 71. The restraint cavity 71 is formed at the bottom of the guide wheel 49. A strong spring 72 and a push head 73 are arranged in the restraint cavity 71. The top of the strong spring 72 is connected to the top of the restraint cavity 71, and the bottom of the strong spring 72 is connected to the top of the push head 73. A rotating head 74 is rotatably arranged inside the bottom of the push head 73. The rotating head 74 abuts against the steel cable 45. A first limit post 75 and a second limit post 76 are respectively fixedly arranged at the top and bottom of the extension cavity 47. A liquid passage cavity 77 is formed at the bottom of the extension cavity 47 and inside the second limit post 76. The liquid passage cavity 77 is filled with lubricating oil. One end of the liquid passage cavity 77 is provided with a push plug 78. The push plug 78 is arranged directly below the rotating head 74. The bottom of the push plug 78 is connected to one end of a buffer spring 83. The other end of the buffer spring 83 is connected to the bottom of the liquid passage cavity 77. A push post 79 is inserted into the other end of the liquid passage cavity 77. Two limit grooves 771 are respectively arranged at both ends on the inner wall of the liquid passage cavity 77. Two limit blocks 791 that slide vertically in the limit grooves 771 are respectively arranged at both ends of the push post 79. An inclined pressure head 80 is arranged at the top of the push post 79. A semi-sheath 81 is arranged at the bottom of the first limit post 75. A pressure groove 82 corresponding to the inclined pressure head 80 is formed inside the semi-sheath 81; The bottom of the push post 79 is beveled; A scraping plate 84 is arranged on the bottom surface of the extension cavity 47 below the steel cable 45.

[0028] The working principle and beneficial effects of the above technical solution are as follows: The scraping plate 84 automatically cleans the steel cable 45 passing over it, reduces the pollutants on the surface of the steel cable 45, ensures the cleanliness inside the equipment, reduces the maintenance frequency. The inner wall of the restraint cavity 71 and the steel cable 45 attached to the bottom of the guide wheel 49 restrain the rotating head 74 and the strong spring 72, so that the strong spring 72 is compressed. The top and bottom of the extension cavity 47 respectively support the first limit post 75 and the second limit post 76. The liquid passage cavity 77 bears the lubricating oil. The bottom of the liquid passage cavity 77 supports the buffer spring 83. The buffer spring 83 supports the push plug 78. A sealed state exists between the push plug 78 and the liquid passage cavity 77. The bottom of the push plug 78 is connected to the buffer spring 83 to prevent the push plug 78 from detaching from the liquid passage cavity 77. The other end of the liquid passage cavity 77 limits the push post 79. The two limit blocks 791 arranged at both ends of the push post 79 are clamped by the limit grooves 771 to prevent the push post 79 from slipping in the liquid passage cavity 77, which may affect the safety of personnel and equipment; When the steel cable 45 breaks, the steel cable 45 relaxes and does not abut against the rotating head 74. The strong spring 72 stretches to push the rotating head 74. The rotating head 74 and the push plug 78 squeeze the steel cable 45 therein. At the same time, the rotating head 74 pushes the push plug 78, and the buffer spring 83 is compressed. The push plug 78 descends in the liquid passage cavity 77. The push plug 78 compresses the lubricating oil in the liquid passage cavity 77. The push rod at the other end of the liquid passage cavity 77 is lifted by the lubricating oil. The bottom of the push column 79 is beveled to increase the force-receiving area, facilitating the application force received by the lubricating oil. The inclined pressure head 80 at the top of the push rod lifts the steel cable 45. The inclined pressure head 80 pushes the steel cable 45 into the pressure groove 82 in the half sheath 81, thereby clamping the steel cable 45 for the second time. The strong spring 72, friction braking and hydraulic linkage locking work together, with a faster response speed and significantly improved braking reliability.

[0029] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application should be covered within the protection scope of this application.

Claims

1. A geothermal well quality monitoring system, characterized by: The quality inspection device comprises a mobile vehicle (1), a loading platform (2) is arranged at the rear end of the mobile vehicle (1), an angle adjustment mechanism (3) for changing the monitoring position is arranged on the loading platform (2), a lifting mechanism (4) for lifting a monitoring mechanism (6) is arranged in the angle adjustment mechanism (3), and an emergency brake component (7) for preventing the monitoring mechanism (6) from falling is arranged in the lifting mechanism (4).

2. A geothermal well quality monitoring system according to claim 1, characterized in that: The angle adjustment mechanism (3) comprises a drive motor (31), the drive motor (31) being fixedly arranged on the top of the loading platform (2), a bevel gear (32) being fixedly arranged on the driving end of the drive motor (31), a rotating column (33) having a tooth pattern on the outer surface being rotatably arranged on the loading platform (2), the bevel gear (32) meshingly transmitting with the rotating column (33), a rotating platform (34) being fixedly arranged on the top of the rotating column (33), a protective cover (35) being provided on the outer cover of the rotating platform (34), and a bottom of the protective cover (35) being fixedly connected to the top of the loading platform (2).

3. A geothermal well quality monitoring system according to claim 2, characterized in that: A support arm 1 (36) is fixedly provided on the top of the rotating platform (34), and a support arm 2 (37) is rotatably provided on the top of the support arm 1 (36). One side of the support arm 1 (36) is hinged to the base of a hydraulic cylinder (38), and the telescopic end of the hydraulic cylinder (38) is hinged to the bottom of the support arm 2 (37).

4. A geothermal well quality monitoring system according to claim 3, characterized in that: The lifting mechanism (4) comprises a fixed cavity (41) and a movable cavity (42); the fixed cavity (41) and the movable cavity (42) are provided in the second support arm (37); a wire passing cavity (43) is provided in the fixed cavity (41) and the movable cavity (42); a cable retractor (44) is fixedly provided in the fixed cavity (41); an extension arm (46) is inserted in the movable cavity (42); a driving component for driving the extension arm (46) to extend and retract in the movable cavity (42) is provided at the top of the second support arm (37); a limiting groove (421) is provided at the bottom of the movable cavity (42); a limiting groove (421) is provided at the bottom of the extension arm (46) for sliding horizontally in the limiting groove (421). Block 1 (461), an extension cavity (47) is provided in the extension arm (46), a wire passing cavity 2 (48) is provided on the side of the extension arm (46) facing the fixed cavity (41), the wire passing cavity 1 (43) is communicated with the wire passing cavity 2 (48), a guide wheel (49) is fixedly provided in the extension cavity (47), a rolling wheel (50) is rotatably provided in the extension cavity (47), the steel cable (45) released from the cable retractor (44) passes through the wire passing cavity 1 (43) and the wire passing cavity 2 (48), the steel cable (45) is respectively bypassed from the bottom of the guide wheel (49) and the top of the rolling wheel (50), and a monitoring mechanism (6) is provided at the free end of the steel cable (45).

5. A geothermal well quality monitoring system according to claim 4, characterized in that: The driving assembly comprises a second driving motor (361), wherein the second driving motor (361) is fixedly arranged on the top of the second supporting arm (37), a spur gear (362) is fixedly arranged on the driving end of the second driving motor (361), a through groove (363) is provided on the top of the movable cavity (42), a tooth pattern is provided on the top of the extension arm (46), and the spur gear (362) meshes with the top of the extension arm (46).

6. A geothermal well quality monitoring system according to claim 4, characterized in that: The emergency brake assembly (7) comprises a restraining chamber (71), the restraining chamber (71) is provided at the bottom of the guide wheel (49), a strong spring (72) and a push head (73) are arranged in the restraining chamber (71), the top of the strong spring (72) is connected to the top of the restraining chamber (71), the bottom of the strong spring (72) is connected to the top of the push head (73), a rotating head (74) is rotatably arranged in the bottom of the push head (73), the rotating head (74) is in contact with the steel cable (45), a limiting column 1 (75) and a limiting column 2 (76) are fixedly arranged at the top and bottom of the extension chamber (47), a liquid chamber (77) is provided in the bottom of the extension chamber (47) and the limiting column 2 (76), the liquid chamber (77) is filled with lubricating oil, and the liquid chamber (77) is provided with a plurality of movable parts. A push plug (78) is provided at one end of the rotating head (74), the push plug (78) is provided just below the rotating head (74), the bottom of the push plug (78) is connected to one end of a buffer spring (83), the other end of the buffer spring (83) is connected to the bottom of the liquid passage chamber (77), a push column (79) is inserted into the other end of the liquid passage chamber (77), two limiting grooves (771) are provided at both ends of the inner wall of the liquid passage chamber (77), two limiting blocks (791) are provided at both ends of the push column (79) for vertically sliding in the two limiting grooves (771), an oblique pressure head (80) is provided at the top of the push column (79), a semi-sheath (81) is provided at the bottom of the limiting column (75), and a pressure groove (82) corresponding to the oblique pressure head (80) is provided in the semi-sheath (81).

7. A geothermal well quality monitoring system according to claim 6, characterized in that: The bottom of the push column (79) is an inclined surface.

8. A geothermal well quality monitoring system according to claim 7, characterized in that: A scraper (84) is provided on the bottom surface of the extension cavity (47) below the steel cable (45).

Images