Horizontal butt joint U-shaped geothermal well and using method thereof
By setting up annular guards and sealing mechanisms at the joints of geothermal wells, the problem of leakage at the joints of geothermal wells is solved, and efficient sealing and real-time monitoring of geothermal wells is achieved.
Patent Information
- Application Number
- CN202311354946.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-19
- Publication Date
- 2025-04-22
AI Technical Summary
The prior art is difficult to effectively detect and prevent leakage at joints when using geothermal wells.
By providing annular guards at the joints of the rising, horizontal and falling sections, including support blocks, annular blocks, grooves, monitoring mechanisms and sealing mechanisms, protection and monitoring of the joints are achieved, and sealing the annular blocks and pipe sections is achieved through the sealing mechanism.
Effectively prevent leakage at the joints, ensure the sealing and safety of geothermal wells, and realize real-time monitoring of the joints through monitoring mechanisms.
Smart Images
Figure CN119860212A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of U-shaped geothermal wells, and in particular relates to a horizontally docked U-shaped geothermal well and a use method thereof. Background Art
[0002] Geothermal wells refer to methods and devices for generating electricity using geothermal energy at a depth of about 3,500 meters or hot spring water with a water temperature greater than 30°C. Geothermal energy is divided into three categories: high temperature, medium temperature, and low temperature. Geothermal energy that is higher than 150°C and exists in the form of steam is considered high temperature geothermal energy; geothermal energy that is between 90°C and 150°C and exists in the form of a mixture of water and steam is considered medium temperature geothermal energy; geothermal energy that is higher than 25°C and lower than 90°C and exists in the form of warm water, warm water, hot water, etc. is considered low temperature geothermal energy.
[0003] The medium-deep geothermal closed underground heat exchange system is a heat extraction technology that does not affect groundwater resources. It obtains geothermal energy through heat exchange between intermediate water and geothermal reservoirs without extracting groundwater. Its essential meaning is completely different from traditional medium-deep geothermal heating. The U-shaped butt-joint well heat exchange principle: drill a U-shaped butt-joint well into the rock formation, use casing cementing technology to close the geothermal well, and establish an in-well heat exchange system. Inject cold water into the inlet well. During the flow of low-temperature water along the vertical and horizontal well sections, it is heated by the surrounding rock and then flows upward from the outlet well to the heat exchanger. After the hot water returns to the ground, its heat is lifted by the heat pump unit and used for building heating. The cooled circulating water enters the underground heat exchange cycle again, bringing the heat in the surrounding rocks to the surface. The cycle repeats over and over again without any hydraulic connection with the groundwater and without damaging the groundwater resources.
[0004] The problem with the prior art is that when using geothermal wells, the joints cannot be properly detected to prevent leakage. Summary of the invention
[0005] In view of the problems existing in the prior art, the present invention provides a horizontally docked U-shaped geothermal well and a method for using the same.
[0006] The present invention is implemented as follows: a horizontally docked U-shaped geothermal well, comprising a U-shaped geothermal well for generating geothermal heat and a sealing cover for sealing the U-shaped geothermal well, wherein the U-shaped geothermal well comprises an ascending section, a horizontal section and a descending section, wherein the output end of the descending section cooperates with the entrance end of the horizontal section, and the output end of the horizontal section cooperates with the entrance end of the descending section, and an annular protective member is provided at the joints of the ascending section, the horizontal section and the descending section; The annular protective member comprises a support block, an annular block, a groove, a monitoring mechanism and a sealing mechanism. The support block is sleeved on the outer surface of the horizontal section, the annular block is sleeved on the joints of the descending section, the horizontal section and the descending section, the groove is opened inside the annular block, the monitoring mechanism is arranged inside the groove, and the sealing mechanism is arranged at the openings at the top and bottom of the annular block; An annular groove is provided on the left and right sides of the top of the horizontal section, and the descending section and the bottom of the descending section are fixedly installed with a plug-in block, the bottom of the annular groove is provided with an annular threaded groove, and the bottom of the plug-in block is fixedly installed with an annular threaded rod, and the end of the annular threaded rod away from the plug-in block is connected to the internal thread of the annular threaded groove.
[0007] As a preferred embodiment of the present invention, the monitoring mechanism includes an annular protective block, a signal transmitter, a processor, a viewing terminal and a signal receiver, the outer surface of the annular protective block is used in conjunction with the interior of the groove, the interior of the annular protective block is used in conjunction with an annular monitoring probe, the top of the annular monitoring probe is used in conjunction with a connecting wire, the signal transmitter is embedded in the rear side of the inner wall of the annular block, the front side of the processor is used in conjunction with the rear side of the signal transmitter, the processor and the annular monitoring probe are used in conjunction through the connecting wire, the viewing terminal is arranged on a workbench, the signal receiver is fixedly installed on the rear side of the viewing terminal, and the signal receiver is used in conjunction with the signal transmitter.
[0008] As a preferred embodiment of the present invention, evenly distributed storage grooves are provided inside the annular protective block, and Peltiers are arranged inside the storage grooves.
[0009] As a preferred embodiment of the present invention, the sealing mechanism includes an annular sealing block, an annular extrusion block, a threaded through hole, a threaded rod, a threaded groove and a rotating handle, the annular sealing block is arranged at the top and bottom openings of the annular block, the annular sealing block is arranged at the top and bottom of the annular block, and is used in conjunction with the outer surfaces of the ascending section, the horizontal section and the descending section, the annular extrusion block is arranged at the top and bottom of the annular block, the threaded groove is opened at the top and bottom of the annular block, the threaded through hole is opened in the interior of the annular extrusion block, the outer surface of the threaded rod is used in conjunction with the interior of the threaded through hole, the bottom of the rotating handle is fixedly connected to the top of the threaded rod, the bottom of the threaded rod is threadedly connected to the inner part of the threaded groove, and the bottom of the annular extrusion block is used in conjunction with an end of the annular sealing block away from the annular block.
[0010] As a preferred embodiment of the present invention, an air pressure detection mechanism is provided on the top of the sealing cover, and the air pressure detection mechanism includes a circular through hole, and the circular through hole is opened on the top of the sealing cover. A circular block is used in combination with the inside of the circular through hole. An air pressure detector is fixedly installed on the top of the sealing cover, and the air pressure detector is located on the right side of the circular through hole. A display screen is embedded on the right side of the air pressure detector.
[0011] As a preferred embodiment of the present invention, a U-shaped hanging block is fixedly installed on the top of the sealing cover, and a matching block is fixedly installed on the bottom of the air pressure detector, and the end of the matching block away from the air pressure detector is used in cooperation with the inside of the U-shaped hanging block.
[0012] As a preferred embodiment of the present invention, a lifting handle is fixedly installed on the top of the circular block, and the outer surface of the lifting handle is provided with evenly distributed anti-slip grooves.
[0013] As a preferred embodiment of the present invention, a method for using a horizontally-jointed U-shaped geothermal well, wherein the horizontally-jointed U-shaped geothermal well is a horizontally-jointed U-shaped geothermal well as described in any one of claims 1 to 4, and the method for using the horizontally-jointed U-shaped geothermal well comprises the following steps: When installing: S1: First, insert the plug-in block into the annular groove. After the insertion is completed, the ascending section, the horizontal section and the descending section can be preliminarily connected. Then, the ascending section, the horizontal section and the descending section are completely connected into a whole by welding. S101: Welding is to weld the ascending section, horizontal section and descending section into a whole by using a welding gun; S02: Then use a grinder to grind the outer surface smooth; S2: Then the annular block is sleeved on the ascending section and the descending section and the annular block is moved to the joint of the ascending section, the horizontal section and the descending section, and then supported by the support block; S3: Then the sealing mechanism is used to position the annular block and install it; When using: S4: Because the annular block is set at the joints of the ascending section, horizontal section and descending section, and fits well; S5: The annular monitoring probe is placed close to the joint and starts to work, monitoring the joint. The monitoring data is transmitted to the processor through the connecting wire for processing. After the processing is completed, the signal is transmitted by the signal transmitter, and at the same time, the signal is received by the external signal receiver and viewed through the viewing terminal; S6: While monitoring, the annular sealing block is attached to the top and bottom of the annular block and to the ascending section, the horizontal section and the descending section. After attachment, the annular extrusion block is placed at the end of the annular sealing block away from the annular block. Then, the rotating handle is manually rotated to drive the threaded rod to rotate inside the threaded through hole. At the same time, the threaded rod is screwed into the threaded groove to achieve extrusion of the annular sealing block and seal. S7: Open the circular block to expose the circular through hole and discharge the internal gas. During the discharge, use an air pressure detector to detect the internal air pressure to check whether the sealing effect is intact.
[0014] 1. The present invention provides an annular protective piece at the joints of the ascending section, the horizontal section and the descending section, thereby achieving protection for the joints. At the same time, a monitoring mechanism is provided inside the annular block to monitor the joints and prevent leakage at the joints. At the same time, a sealing mechanism is used to seal the contact parts between the annular block and the ascending section, the horizontal section and the descending section.
[0015] 2. The present invention realizes the detection of air pressure by arranging an air pressure detector on the top of the sealing cover. During the detection, the circular block is taken out from the inside of the circular through hole to discharge the gas in the well. During the discharge, the air pressure inside the well is detected by the air pressure detector, so that it is possible to detect whether there is a leak inside the well. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the structure provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the coordination structure of the descending section and the horizontal section provided in an embodiment of the present invention; Figure 3 2 is a schematic diagram of an open structure of an annular extrusion block provided in an embodiment of the present invention; Figure 4 is a schematic diagram of the ring block structure provided by an embodiment of the present invention; Figure 5 It is a schematic diagram of the structure of the annular block planing provided by an embodiment of the present invention; Figure 6 The embodiment of the present invention provides Figure 1 Enlarged view of point A in the middle; Figure 7 The embodiment of the present invention provides Figure 1 Enlarged view of point B in the middle; Figure 8 It is a schematic diagram of the matching structure of a U-shaped hanging block and a matching block provided in an embodiment of the present invention.
[0017] In the figure: 1, ascending section; 2, horizontal section; 3, descending section; 4, annular protective member; 41, supporting block; 42, annular block; 43, groove; 44, monitoring mechanism; 441, annular protective block; 442, annular monitoring probe; 443, connecting wire; 444, signal transmitter; 445, processor; 446, viewing terminal; 447, signal receiver; 45, sealing mechanism; 451, annular sealing block; 452, annular extrusion block; 453, threaded through hole; 454, threaded rod; 455, threaded groove; 456, rotating handle; 5, annular groove; 6, plug-in block; 7, annular threaded groove; 8, annular threaded rod; 9, storage slot; 10, Peltier; 11, air pressure detection mechanism; 111, circular through hole; 112, air pressure detector; 113, circular block; 114, display screen; 12, U-shaped hanging block; 13, matching block; 14, lifting handle. Implementation
[0018] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.
[0019] The structure of the present invention is described in detail below in conjunction with the accompanying drawings.
[0020] like Figures 1 to 8 As shown, a horizontally docked U-shaped geothermal well provided by an embodiment of the present invention includes a U-shaped geothermal well for generating geothermal heat and a sealing cover for sealing the U-shaped geothermal well, wherein the U-shaped geothermal well includes an ascending section 1, a horizontal section 2 and a descending section 3, wherein the output end of the descending section 1 cooperates with the inlet end of the horizontal section 2, and the output end of the horizontal section 2 cooperates with the inlet end of the descending section 3, and an annular protective member 4 is provided at the joints of the ascending section 1, the horizontal section 2 and the descending section 3; The annular protective member 4 includes a support block 41, an annular block 42, a groove 43, a monitoring mechanism 44 and a sealing mechanism 45. The support block 41 is sleeved on the outer surface of the horizontal section 2, the annular block 42 is sleeved at the joints of the descending section 1, the horizontal section 2 and the descending section 3, the groove 43 is opened inside the annular block 42, the monitoring mechanism 44 is arranged inside the groove 43, and the sealing mechanism 45 is arranged at the top and bottom openings of the annular block 42; Annular grooves 5 are provided on the left and right sides of the top of the horizontal section 2, plug-in blocks 6 are fixedly installed at the bottom of the descending section 1 and the descending section 3, an annular threaded groove 7 is provided at the bottom of the annular groove 5, an annular threaded rod 8 is fixedly installed at the bottom of the plug-in block 6, and one end of the annular threaded rod 8 away from the plug-in block 6 is connected to the internal thread of the annular threaded groove 7.
[0021] refer to Figure 4 , Figure 5 and Figure 6The monitoring mechanism 44 includes an annular protective block 441, a signal transmitter 444, a processor 445, a viewing terminal 446 and a signal receiver 447. The outer surface of the annular protective block 441 is used in conjunction with the interior of the groove 43. The interior of the annular protective block 441 is used in conjunction with an annular monitoring probe 442. The top of the annular monitoring probe 442 is used in conjunction with a connecting wire 443. The signal transmitter 444 is embedded in the rear side of the inner wall of the annular block 42. The front side of the processor 445 is used in conjunction with the rear side of the signal transmitter 444. The processor 445 and the annular monitoring probe 442 are used in conjunction through the connecting wire 443. The viewing terminal 446 is set on the workbench. The signal receiver 447 is fixedly installed on the rear side of the viewing terminal 446. The signal receiver 447 is used in conjunction with the signal transmitter 444.
[0022] The above scheme is adopted: the annular monitoring probe 442 is closely attached to the joint and starts working to monitor the joint, and the monitoring data is transmitted to the inside of the processor 445 through the connecting wire 443 for processing. After the processing is completed, the signal is emitted by the signal transmitter 444, and at the same time, the signal is received by the external signal receiver 447 and viewed through the viewing terminal 446, so that the internal
[0023] refer to Figure 5 The annular protective block 441 is provided with evenly distributed storage grooves 9 , and the storage grooves 9 are provided with Peltiers 10 .
[0024] By adopting the above solution, a storage groove 9 is provided inside the annular protective block 441 , and a Peltier 10 is arranged inside the storage groove 9 , so that the annular monitoring probe 442 can be cooled and the service life of the annular monitoring probe 442 can be extended.
[0025] refer to Figure 3 The sealing mechanism 45 includes an annular sealing block 451, an annular extrusion block 452, a threaded through hole 453, a threaded rod 454, a threaded groove 455 and a rotating handle 456. The annular sealing block 451 is arranged at the top and bottom openings of the annular block 42. The annular sealing block 451 is arranged at the top and bottom of the annular block 42 and is used in conjunction with the outer surfaces of the ascending section 1, the horizontal section 2 and the descending section 3. The annular extrusion block 452 is arranged at the top and bottom of the annular block 42. The threaded groove 455 is opened at the top and bottom of the annular block 42. The threaded through hole 453 is opened inside the annular extrusion block 452. The outer surface of the threaded rod 454 is used in conjunction with the inside of the threaded through hole 453. The bottom of the rotating handle 456 is fixedly connected to the top of the threaded rod 454. The bottom of the threaded rod 454 is threadedly connected to the inside of the threaded groove 455. The bottom of the annular extrusion block 452 is used in conjunction with an end of the annular sealing block 451 away from the annular block 42.
[0026] The above scheme is adopted: while monitoring, the annular sealing block 451 is fitted on the top and bottom of the annular block 42 and fits with the ascending section 1, the horizontal section 2 and the descending section 3. After fitting, the annular extrusion block 452 is placed on the end of the annular sealing block 451 away from the annular block 42, and then the rotating handle 456 is rotated manually to drive the threaded rod 454 to rotate inside the threaded through hole 453, and at the same time, the threaded rod 454 is screwed into the inside of the threaded groove 455 to achieve extrusion of the annular sealing block 451 and achieve sealing.
[0027] refer to Figure 7 An air pressure detection mechanism 11 is arranged on the top of the sealing cover. The air pressure detection mechanism 11 includes a circular through hole 111. The circular through hole 111 is opened on the top of the sealing cover. A circular block 113 is used in cooperation with the interior of the circular through hole 111. An air pressure detector 112 is fixedly installed on the top of the sealing cover. The air pressure detector 112 is located on the right side of the circular through hole 111. A display screen 114 is embedded on the right side of the air pressure detector 112.
[0028] The above solution is adopted: by opening the circular block 113, the circular through hole 111 is exposed, and the internal gas is discharged. During the discharge, the internal air pressure is detected by using the air pressure detector 112 to detect whether the sealing effect is intact.
[0029] refer to Figure 8 A U-shaped hanging block 12 is fixedly installed on the top of the sealing cover, and a matching block 13 is fixedly installed on the bottom of the air pressure detector 112. The end of the matching block 13 away from the air pressure detector 112 cooperates with the inside of the U-shaped hanging block 12.
[0030] The above solution is adopted: by providing the U-shaped hanging block 12 and using the matching block 13 inside, the positioning of the air pressure detector 112 can be achieved, and the detection effect is better.
[0031] refer to Figure 7 and Figure 8 A lifting handle 14 is fixedly mounted on the top of the circular block 113 , and an outer surface of the lifting handle 14 is provided with evenly distributed anti-slip grooves.
[0032] By adopting the above solution, by pulling the handle 14 , the opening and sealing effects of the circular block 113 can be improved.
[0033] A method for using a horizontally butted U-shaped geothermal well, characterized in that: the horizontally butted U-shaped geothermal well is a horizontally butted U-shaped geothermal well as claimed in any one of claims 1 to 7, and the method for using the geothermal well comprises the following steps: When installing: S1: First, insert the plug-in block 6 into the annular groove 5. After the insertion is completed, the ascending section 1, the horizontal section 2 and the descending section 3 can be preliminarily connected. Then, the ascending section 1, the horizontal section 2 and the descending section 3 are completely connected into a whole by welding. S101: welding the ascending section 1, the horizontal section 2 and the descending section 3 into a whole by welding with a welding torch; S102: Then use a grinder to grind the outer surface to make it smooth; S2: Then the annular block 42 is sleeved on the ascending section 1 and the descending section 3 and the annular block 42 is moved to the joint of the ascending section 1, the horizontal section 2 and the descending section 3, and then supported by the support block 41; S3: Then the sealing mechanism 45 is used to position the annular block 42 and install it; When using: S4: The annular block 42 is sleeved at the joints of the ascending section 1, the horizontal section 2 and the descending section 3 and fits closely; S5: The annular monitoring probe 442 is placed close to the joint and starts to work, monitoring the joint. The monitoring data is transmitted to the processor 445 through the connecting wire 443 for processing. After the processing is completed, the signal is transmitted by the signal transmitter 444. At the same time, the signal is received by the external signal receiver 447 and viewed through the viewing terminal 446. S6: While monitoring, the annular sealing block 451 is fitted to the top and bottom of the annular block 42 and to the ascending section 1, the horizontal section 2 and the descending section 3. After fitting, the annular extrusion block 452 is placed at the end of the annular sealing block 451 away from the annular block 42, and then the rotating handle 456 is manually rotated to drive the threaded rod 454 to rotate inside the threaded through hole 453, and at the same time, the threaded rod 454 is screwed into the threaded groove 455 to squeeze the annular sealing block 451 and achieve sealing; S7: By opening the circular block 113, the circular through hole 111 is exposed, and the internal gas is discharged. During the discharge, the internal air pressure is detected by the air pressure detector 112 to detect whether the sealing effect is intact.
[0034] When in use, first insert the plug-in block 6 into the annular groove 5 by manpower, and then after the insertion is completed, the ascending section 1, the horizontal section 2 and the descending section 3 can be preliminarily connected, and then the ascending section 1, the horizontal section 2 and the descending section 3 are completely connected into a whole by welding, and the annular block 42 is sleeved on the ascending section 1 and the descending section 3 and the annular block 42 is moved to the joint of the ascending section 1, the horizontal section 2 and the descending section 3, and then supported by the support block 41, after the support, the annular sealing block 451 is fitted to the top and bottom of the annular block 42 and fits with the ascending section 1, the horizontal section 2 and the descending section 3, after fitting, the annular extrusion block 452 is placed on the end of the annular sealing block 451 away from the annular block 42, and then the rotating handle 456 is rotated manually to drive the threaded rod 454 to rotate inside the threaded through hole 453, and at the same time, the threaded rod 454 is screwed into the inside of the threaded groove 455, so as to achieve the annular sealing block 45 1 is squeezed to achieve sealing, and the annular block 42 can also be positioned on the supporting block 41, so that the detection and sealing effects are better. Secondly, while achieving sealing, the annular monitoring probe 442 is close to the joint and starts to work to monitor the joint. The monitoring data is transmitted to the inside of the processor 445 through the connecting wire 443 for processing. After the processing is completed, the signal is transmitted by the signal transmitter 444, and the signal is received by the external signal receiver 447 and viewed through the viewing terminal 446. In this way, it is possible to monitor whether the joint is leaking well. Finally, an air pressure detector 112 is provided on the top of the sealing cover to detect the air pressure. During the detection, the circular block 113 is taken out from the inside of the circular through hole 111 to discharge the gas in the well. During the discharge, the air pressure inside the well is detected by the air pressure detector 112, so that it is possible to detect whether there is leakage inside the well.
[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A horizontally docked U-shaped geothermal well, comprising a U-shaped geothermal well for generating geothermal heat and a sealing cover for sealing the U-shaped geothermal well, characterized in that: The U-shaped geothermal well comprises an ascending section (1), a horizontal section (2) and a descending section (3); the output end of the descending section (1) is used in conjunction with the inlet end of the horizontal section (2); the output end of the horizontal section (2) is used in conjunction with the inlet end of the descending section (3); and an annular protective member (4) is provided at the joints of the ascending section (1), the horizontal section (2) and the descending section (3); The annular protective member (4) comprises a supporting block (41), an annular block (42), a groove (43), a monitoring mechanism (44) and a sealing mechanism (45); the supporting block (41) is sleeved on the outer surface of the horizontal section (2); the annular block (42) is sleeved on the joints of the descending section (1), the horizontal section (2) and the descending section (3); the groove (43) is opened inside the annular block (42); the monitoring mechanism (44) is arranged inside the groove (43); and the sealing mechanism (45) is arranged at the openings at the top and bottom of the annular block (42); The top of the horizontal section (2) is provided with an annular groove (5) on both left and right sides, the bottoms of the descending section (1) and the descending section (3) are fixedly mounted with a plug-in block (6), the bottom of the annular groove (5) is provided with an annular threaded groove (7), the bottom of the plug-in block (6) is fixedly mounted with an annular threaded rod (8), and one end of the annular threaded rod (8) away from the plug-in block (6) is connected to the internal thread of the annular threaded groove (7).
2. A horizontally butted U-shaped geothermal well as claimed in claim 1, characterized in that: The monitoring mechanism (44) comprises an annular protective block (441), a signal transmitter (444), a processor (445), a viewing terminal (446) and a signal receiver (447); the outer surface of the annular protective block (441) is used in conjunction with the interior of the groove (43); the interior of the annular protective block (441) is used in conjunction with an annular monitoring probe (442); the top of the annular monitoring probe (442) is used in conjunction with a connecting wire (443); the signal transmitter (444) is embedded in the rear side of the inner wall of the annular block (42); the front side of the processor (445) is used in conjunction with the rear side of the signal transmitter (444); the processor (445) and the annular monitoring probe (442) are used in conjunction with each other via the connecting wire (443); the viewing terminal (446) is arranged on a workbench; the signal receiver (447) is fixedly mounted on the rear side of the viewing terminal (446); and the signal receiver (447) is used in conjunction with the signal transmitter (444).
3. A horizontally butted U-shaped geothermal well as claimed in claim 2, characterized in that: The annular protective block (441) is provided with evenly distributed storage grooves (9) inside, and a Peltier (10) is arranged inside the storage groove (9).
4. A horizontally butted U-shaped geothermal well as claimed in claim 1, characterized in that: The sealing mechanism (45) comprises an annular sealing block (451), an annular extrusion block (452), a threaded through hole (453), a threaded rod (454), a threaded groove (455) and a rotating handle (456). The annular sealing block (451) is arranged at the top and bottom openings of the annular block (42). The annular sealing block (451) is arranged at the top and bottom of the annular block (42) and is used in conjunction with the outer surfaces of the ascending section (1), the horizontal section (2) and the descending section (3). The annular extrusion block (452) is arranged at the top and bottom of the annular block (42). The threaded groove (455) is formed at the top and bottom of the annular block (42), the threaded through hole (453) is formed inside the annular extrusion block (452), the outer surface of the threaded rod (454) cooperates with the inside of the threaded through hole (453), the bottom of the rotating handle (456) is fixedly connected to the top of the threaded rod (454), the bottom of the threaded rod (454) is threadedly connected to the inside of the threaded groove (455), and the bottom of the annular extrusion block (452) cooperates with the end of the annular sealing block (451) away from the annular block (42).
5. The horizontally butted U-shaped geothermal well according to claim 1, characterized in that: An air pressure detection mechanism (11) is arranged on the top of the sealing cover. The air pressure detection mechanism (11) comprises a circular through hole (111). The circular through hole (111) is opened on the top of the sealing cover. A circular block (113) is used in cooperation with the interior of the circular through hole (111). An air pressure detector (112) is fixedly mounted on the top of the sealing cover. The air pressure detector (112) is located on the right side of the circular through hole (111). A display screen (114) is embedded on the right side of the air pressure detector (112).
6. A horizontally butted U-shaped geothermal well as claimed in claim 5, characterized in that: A U-shaped hanging block (12) is fixedly mounted on the top of the sealing cover, and a matching block (13) is fixedly mounted on the bottom of the air pressure detector (112); an end of the matching block (13) away from the air pressure detector (112) is used in coordination with the interior of the U-shaped hanging block (12).
7. A horizontally butted U-shaped geothermal well as claimed in claim 5, characterized in that: A lifting handle (14) is fixedly mounted on the top of the circular block (113), and the outer surface of the lifting handle (14) is provided with evenly distributed anti-slip grooves.
8. A method for using a horizontally docked U-shaped geothermal well, characterized by: The horizontally butted U-shaped geothermal well is a horizontally butted U-shaped geothermal well as claimed in any one of claims 1 to 7, and the method of use comprises the following steps: When installing: S1: First, the plug-in block (6) is inserted into the annular groove (5). After the insertion is completed, the ascending section (1), the horizontal section (2) and the descending section (3) are preliminarily connected. Then, the ascending section (1), the horizontal section (2) and the descending section (3) are completely connected into a whole by welding. S101: welding is to weld the ascending section (1), the horizontal section (2) and the descending section (3) into a whole by using a welding torch; S102: Then use a grinder to grind the outer surface to make it smooth; S2: Then, the annular block (42) is sleeved on the ascending section (1) and the descending section (3), and the annular block (42) is moved to the joint between the ascending section (1), the horizontal section (2) and the descending section (3), and then supported by the support block (41); S3: Then, the sealing mechanism (45) is used to position the annular block (42) and install it; When using: S4: The annular block (42) is sleeved on the joints of the ascending section (1), the horizontal section (2) and the descending section (3) and fits them together; S5: The annular monitoring probe (442) is closely attached to the joint and starts to work, monitoring the joint, and transmitting the monitoring data to the inside of the processor (445) through the connecting wire (443) for processing. After the processing is completed, the signal is transmitted by the signal transmitter (444), and the signal is received by the external signal receiver (447) and viewed through the viewing terminal (446); S6: While monitoring, the annular sealing block (451) is attached to the top and bottom of the annular block (42) and to the ascending section (1), the horizontal section (2) and the descending section (3). After the attachment, the annular extrusion block (452) is placed at the end of the annular sealing block (451) away from the annular block (42). Then, the rotating handle (456) is manually rotated to drive the threaded rod (454) to rotate inside the threaded through hole (453). At the same time, the threaded rod (454) is screwed into the inside of the threaded groove (455) to achieve extrusion of the annular sealing block (451) and achieve sealing. S7: The circular block (113) is opened to expose the circular through hole (111), and the gas inside is discharged. During the discharge, the internal air pressure is detected by using an air pressure detector (112) to detect whether the sealing effect is intact.