Sandstone thermal reservoir underground structure transformation and channel maintenance device

Abstract

The invention discloses a sandstone thermal reservoir underground structure transformation and channel maintenance device, and relates to the technical field of underground structure maintenance of geothermal recharge wells. The problem that a plurality of recharge water holes in the inner wall of a recharge well pipe cannot be effectively dredged is solved. The device specifically comprises a mounting plate, a motor is fixed to the outer wall of the bottom of the mounting plate, a first rotating shaft is fixed to an output shaft of the motor and penetrates through the outer wall of the top of the mounting plate, the outer wall of the top of the mounting plate is rotationally connected with a second rotating shaft, and the second rotating shaft is in transmission connection with the first rotating shaft through a transmission belt; a drilling machine is slidably connected to the inner wall of the guide plate, an output shaft of the drilling machine is connected with a drill bit through a coupler, and a hydraulic push rod is fixed to the outer wall of the guide plate. The drill bit can synchronously rotate along with the high-definition camera, so that the angle of the drill bit is changed according to dredging requirements, and recharge water holes in different positions of the inner wall of a recharge well pipe are dredged.

Description

Technical Field

[0001] The present invention relates to the technical field of underground structure maintenance of geothermal recharge wells, and in particular to an underground structure reconstruction and channel maintenance device for sandstone thermal reservoirs. Background Art

[0002] Due to the unique geological conditions of sandstone thermal reservoirs, sandstone geothermal wells have low recharge rates and low geothermal development and utilization rates. Recharge has always been a key issue hindering the efficient development and utilization of geothermal heating, especially for the Guantao Formation sandstone thermal reservoir. Existing geothermal development and utilization generally involves pumping water from geothermal wells, exchanging heat, and then recharging the water through recharge wells. The recharge wells and geothermal wells have essentially the same structure, with perforations being made in the corresponding aquifers, allowing the recharge water to flow into the underground aquifer through the perforations in the inner wall of the recharge well pipe. Because geothermal water contains a large amount of minerals, organic matter, and special components, and the recharge water temperature is low, recharge into the well can easily cause the minerals in the water to crystallize, leading to blockage of the recharge well pipe. Therefore, scaling and mud and sand carried by heating tail water in the recharge well are the main causes of geothermal well recharge rate attenuation and blockage.

[0003] After searching, the Chinese patent application number CN202211375831.8 discloses a geothermal water recharge well anti-clogging device and its use method. The anti-clogging device collects debris through a scraper. A dredging assembly is provided inside the support assembly. The dredging assembly is provided with a stirring head. The stirring head is coordinated with a gear set to achieve multi-angle rotation and can vibrate, thereby improving the efficiency of dredging the recharge well.

[0004] However, since the above technical solution does not have a mechanism for clearing the recharge water holes on the inner wall of the recharge well pipe for discharging the recharge water into the underground aquifer, it still has the problem of only being able to clear the scale on the inner wall of the recharge well pipe, but being unable to effectively clear the multiple recharge water holes on the inner wall of the recharge well pipe. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a device for underground structure reconstruction and channel maintenance of sandstone thermal reservoirs.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A device for underground structural transformation and channel maintenance of a sandstone thermal reservoir comprises a mounting plate, a motor is fixed to the bottom outer wall of the mounting plate, a first rotating shaft is fixed to the output shaft of the motor, the first rotating shaft passes through the top outer wall of the mounting plate, the top outer wall of the mounting plate is rotatably connected to the second rotating shaft, the second rotating shaft is transmission-connected to the first rotating shaft via a transmission belt, a guide plate is fixed to the top outer wall of the second rotating shaft, a drilling rig is slidingly connected to the inner wall of the guide plate, the output shaft of the drilling rig is connected to the drill bit via a coupling, a group of hydraulic push rods are fixed to the outer wall of the guide plate, and the output shafts of the hydraulic push rods are fixed to one side outer wall of the drilling rig.

[0008] Preferably: the bottom outer wall of the mounting plate is rotatably connected to a rotating column, the outer wall of the rotating column is fixed with a second transmission wheel, the outer wall of the first rotating shaft is fixed with a first transmission wheel, the first transmission wheel and the second transmission wheel are connected by a transmission belt, the bottom outer wall of the rotating column is fixed with a connecting head, the bottom outer wall of the connecting head is fixed with a connecting sleeve, and the inner wall of the connecting sleeve is fixed with a descaling roller by bolts.

[0009] Furthermore: a connecting plate is fixed to the inner wall of the connecting sleeve by bolts, and a sonar probe, a high-definition camera and a temperature and humidity sensor are provided on the outer wall of the bottom of the connecting plate.

[0010] Further preferably, traction heads are fixed to the four corners of the top outer wall of the mounting plate.

[0011] As a preferred embodiment of the present invention: a nozzle is fixed to the bottom outer wall of the guide plate, an input end on one side of the nozzle is plugged with a water guide joint, and the water guide joint is fixed to the bottom outer wall of the guide plate.

[0012] As a further preferred embodiment of the present invention, a plurality of support frames are fixed to the outer wall of the mounting plate, and the support frames are slidably connected to the inner wall of the recharging well pipe.

[0013] As a further solution of the present invention: a plurality of telescopic rods are fixed to the outer wall of the connecting head by bolts, the telescopic ends of the telescopic rods are fixed to a connecting frame, and the inner wall of the connecting frame is rotatably connected to a grinding roller.

[0014] On the basis of the above-mentioned solution: a gear ring is fixed on the top outer wall of the grinding drum, and the gear ring passes through the top outer wall of the connecting frame.

[0015] Based on the above solution, it is preferred that: an annular gear ring is fixed to the outer wall of the bottom of the support frame, and the gear rings are meshed and connected with each other.

[0016] Based on the above scheme, it is further preferred that: the inner wall of the connecting sleeve is fixed with a spiral conveying rod by bolts, the outer wall of the spiral conveying rod is rotatably connected to a fixed tube, and a plurality of fixed rods are fixed to the outer wall of the top of the fixed tube, and the fixed rods are fixed to the outer wall of the annular gear ring by screws.

[0017] The beneficial effects of the present invention are:

[0018] 1. The motor can be controlled to drive the second rotating shaft and the connecting plate to rotate at the corresponding angles at the same time, so that the high-definition camera can rotate synchronously with the drill bit. The high-definition camera can comprehensively observe the internal conditions of the reinjection well pipe while the drill bit can rotate synchronously with the high-definition camera. The angle of the drill bit can be changed according to the dredging needs to dredge the reinjection water holes located at different positions on the inner wall of the reinjection well pipe.

[0019] 2. The water guide joint can be connected to the water spraying equipment on one side of the wellhead through the corresponding water supply pipeline, and water can be sprayed to the drilling part of the drill bit through the nozzle, so that the rotating drill bit can not only dredge the blocked recharge water holes, but also drill new recharge water holes on the inner wall of the recharge well pipe as needed, connect the recharge well pipe with the new aquifer, improve the overall recharge capacity of the recharge well pipe, facilitate the adaptive transformation of the downhole structure of the recharge well by the overall device, and increase the overall service life of the recharge well.

[0020] 3. The staff can also fix the grinding roller on the outer wall of the connector through the telescopic rod, so that when the connector rotates, it can drive multiple telescopic rods on the outer wall to rotate at the same time. When the telescopic rod rotates, it can drive the grinding roller connected to the outer wall to rotate on the inner wall of the recharge well pipe. At the same time, when the grinding roller rotates, it will drive the top gear ring to rotate on the outer wall of the annular gear ring, so that the annular gear ring can drive the grinding roller rotating around the connector to rotate through the gear ring, so that the grinding roller cooperates with the descaling roller rotating at the bottom to fully grind the inner wall of the recharge well pipe, thereby improving the overall dredging and maintenance effect of the device on the inner wall of the recharge well pipe.

[0021] 4. The motor is controlled by the intelligent terminal to drive the spiral conveying rod at the bottom of the connecting sleeve to rotate, and the residue accumulated when cleaning the scale inside the reinjection well pipe is transported to the inside of the fixed pipe through the rotating spiral conveying rod. Then the mounting plate is pulled out of the reinjection well pipe, and the staff can recycle the residue collected in the fixed pipe to avoid the accumulation of a large amount of residue generated during the cleaning of scale at the bottom of the reinjection well pipe, thereby further improving the overall cleaning, maintenance and dredging effect of the device on the reinjection well. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the main structure of a sandstone thermal reservoir downhole structure transformation and channel maintenance device proposed by the present invention;

[0023] Figure 2 This is a schematic diagram of the mounting plate structure of a sandstone thermal reservoir downhole structure transformation and channel maintenance device proposed by the present invention;

[0024] Figure 3 This is a schematic diagram of the connector structure of a sandstone thermal reservoir downhole structure transformation and channel maintenance device proposed by the present invention;

[0025] Figure 4 This is a schematic diagram of the guide plate structure of a sandstone thermal reservoir downhole structure transformation and channel maintenance device proposed by the present invention;

[0026] Figure 5 This is a schematic diagram of the connection plate structure of a sandstone thermal reservoir downhole structure transformation and channel maintenance device proposed by the present invention;

[0027] Figure 6 This is a schematic diagram of the spiral conveying rod structure of a sandstone thermal reservoir downhole structure transformation and channel maintenance device proposed by the present invention.

[0028] In the figure: 1 mounting plate, 2 traction head, 3 descaling roller, 4 recharge well pipe, 5 recharge water hole, 6 aquifer, 7 partition layer, 8 support frame, 9 nozzle, 10 drill bit, 11 guide plate, 12 drilling rig, 13 hydraulic push rod, 14 ring gear, 15 connecting frame, 16 grinding roller, 17 annular ring gear, 18 connecting head, 19 telescopic rod, 20 motor, 21 connecting sleeve, 22 first transmission wheel, 23 second transmission wheel, 24 rotating column, 25 first rotating shaft, 26 water guide joint, 27 second rotating shaft, 28 connecting plate, 29 temperature and humidity sensor, 30 high-definition camera, 31 sonar probe, 32 fixing rod, 33 fixing pipe, 34 spiral conveying rod. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be further described in detail below in conjunction with specific implementation methods.

[0030] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0031] Example 1:

[0032] A device for underground structural transformation and channel maintenance of sandstone thermal reservoirs, such as Figure 1-6 As shown, it includes a mounting plate 1, a motor 20 is fixed to the bottom outer wall of the mounting plate 1, and a first rotating shaft 25 is fixed to the output shaft of the motor 20. The first rotating shaft 25 passes through the top outer wall of the mounting plate 1, and the top outer wall of the mounting plate 1 is rotatably connected to the second rotating shaft 27. The second rotating shaft 27 is transmission-connected to the first rotating shaft 25 via a transmission belt. A guide plate 11 is fixed to the top outer wall of the second rotating shaft 27, and a drilling rig 12 is slidably connected to the inner wall of the guide plate 11. The output shaft of the drilling rig 12 is connected to the drill bit 10 via a coupling. A group of hydraulic push rods 13 are fixed to the outer wall of the guide plate 11, and the output shaft of the hydraulic push rod 13 is fixed to the outer wall of one side of the drilling rig 12.

[0033] The bottom outer wall of the mounting plate 1 is rotatably connected to a rotating column 24, the outer wall of the rotating column 24 is fixed with a second transmission wheel 23, the outer wall of the first rotating shaft 25 is fixed with a first transmission wheel 22, the first transmission wheel 22 and the second transmission wheel 23 are connected by a transmission belt, the bottom outer wall of the rotating column 24 is fixed with a connecting head 18, the bottom outer wall of the connecting head 18 is fixed with a connecting sleeve 21, and the inner wall of the connecting sleeve 21 is fixed with a descaling roller 3 by bolts.

[0034] The inner wall of the connecting sleeve 21 is fixed with a connecting plate 28 by bolts, and the outer wall of the bottom of the connecting plate 28 is provided with a sonar probe 31, a high-definition camera 30 and a temperature and humidity sensor 29;

[0035] The four corners of the top outer wall of the mounting plate 1 are respectively fixed with traction heads 2;

[0036] The nozzle 9 is fixed to the outer wall of the bottom of the guide plate 11. The input end of one side of the nozzle 9 is plugged with a water guide joint 26, which is fixed to the outer wall of the bottom of the guide plate 11.

[0037] The staff first fixes the traction rope on the traction head 2, and then uses the traction equipment to put the mounting plate 1 as a whole into the recharge well pipe 4 that needs maintenance, and then uses the traction equipment to pull the mounting plate 1 as a whole to move into the recharge well pipe 4 at a uniform speed. The staff first fixes the connecting plate 28 inside the connecting sleeve 21 by bolts, and then the temperature and humidity sensor 29, high-definition camera 30 and sonar probe 31 provided at the bottom of the connecting plate 28 can be used to detect the situation inside the recharge well pipe 4. The temperature and humidity sensor 29, high-definition camera 30 and sonar probe 31 are connected to the smart terminal provided at the top of the recharge well through a data transmission line, so that the detected data and the real-time high-definition picture of the well are transmitted to the smart terminal for display, so that the staff can observe the real situation inside the recharge well pipe 4 and judge whether the recharge well pipe 4 is blocked and whether the multiple recharge water holes 5 on the inner wall of the recharge well pipe 4 are blocked;

[0038] When the recharge water hole 5 corresponding to the inner wall of the recharge well pipe 4 is found to be blocked, since the distance between the high-definition camera 30 and the drill bit 10 is a fixed value, it is only necessary to pull the mounting plate 1 downward by a corresponding distance through the traction device to move the drill bit 10 to the side of the blocked recharge water hole 5. Then, the drilling rig 12 and the hydraulic push rod 13 are controlled to operate simultaneously through the intelligent terminal on the well, so that the hydraulic push rod 13 stably pushes the rotating drill bit 10 forward to dredge the blocked recharge water hole 5. Then, the mounting plate 1 can be pulled upward by a corresponding distance through the traction device, so that the dredged recharge water hole 5 can be observed through the high-definition camera 30 to determine whether the recharge water hole 5 as a whole and the corresponding aquifer 6 on one side are completely dredged.

[0039] At the same time, the motor 20 can be controlled to drive the second rotating shaft 27 and the connecting plate 28 to rotate at the corresponding angles at the same time, so that the high-definition camera 30 can rotate synchronously with the drill bit 10, so that the high-definition camera 30 can comprehensively observe the internal situation of the recharge well pipe 4, and the drill bit 10 can rotate synchronously with the high-definition camera 30, thereby changing the angle of the drill bit 10 according to the dredging needs, thereby dredging the recharge water holes 5 located at different positions on the inner wall of the recharge well pipe 4.

[0040] At the same time, the water guide joint 26 can be connected to the water spraying equipment on the side of the wellhead through the corresponding water supply pipeline, so that water can be sprayed to the drilling part of the drill bit 10 through the nozzle 9, so that the rotating drill bit 10 can not only dredge the blocked recharge water hole 5, but also drill new recharge water holes 5 on the inner wall of the recharge well pipe 4 as needed, and connect the recharge well pipe 4 with the new aquifer 6, thereby improving the overall recharge capacity of the recharge well pipe 4, thereby facilitating the adaptive transformation of the downhole structure of the recharge well by the overall device, and improving the overall service life of the recharge well.

[0041] When it is necessary to clean and dredge the scale inside the recharge well pipe 4, first remove the connecting plate 28 fixed to the inner wall of the connecting sleeve 21 by bolts, and at the same time pull out the lines connected to the hydraulic push rod 13 and the drilling rig 12, then insert the descaling drum 3 as a whole into the connecting sleeve 21 and fix it with bolts, and then the mounting plate 1 can be pulled down as a whole into the recharge well pipe 4, and then the motor 20 is controlled by the intelligent terminal to drive the first rotating shaft 25 to rotate. When the first rotating shaft 25 rotates, it will drive the rotating column 24 and the connector 18 to rotate through the transmission belt, thereby driving the descaling drum 3 fixed on the inner wall of the connecting sleeve 21 to rotate, and the scale attached to the inner wall of the recharge well pipe 4 is polished and dredged by rotating the descaling drum 3 to ensure that the inside of the recharge well pipe 4 is unobstructed.

[0042] like Figure 2-3 As shown, a plurality of support frames 8 are fixed to the outer wall of the mounting plate 1, and the support frames 8 are slidably connected to the inner wall of the recharge well pipe 4; the support frames 8 can support and guide the entire mounting plate 1 entering the inner wall of the recharge well pipe 4, thereby improving the stability of the descaling drum 3 and other equipment at the bottom of the mounting plate 1 during operation.

[0043] like Figure 2-4 As shown, the outer wall of the connecting head 18 is fixed with multiple telescopic rods 19 by bolts, the telescopic ends of the telescopic rods 19 are fixed with a connecting frame 15, and the inner wall of the connecting frame 15 is rotatably connected with a grinding roller 16;

[0044] A gear ring 14 is fixed to the top outer wall of the grinding drum 16, and the gear ring 14 passes through the top outer wall of the connecting frame 15;

[0045] The outer wall of the bottom of the support frame 8 is fixed with an annular gear ring 17, and the gear ring 14 is meshed with the annular gear ring 17; when the motor 20 drives the descaling drum 3 to rotate to grind and dredge the inner wall of the recharge well pipe 4, the staff can simultaneously fix the grinding drum 16 to the outer wall of the connecting head 18 through the telescopic rod 19, so that when the connecting head 18 rotates, it can simultaneously drive multiple telescopic rods 19 of the outer wall to rotate. When the telescopic rod 19 rotates, it can drive the grinding drum 16 connected to the outer wall to rotate on the inner wall of the recharge well pipe 4. At the same time, when the grinding drum 16 rotates, it will drive the top gear ring 14 to rotate on the outer wall of the annular gear ring 17, so that the annular gear ring 17 drives the grinding drum 16 rotating around the connecting head 18 to rotate by itself through the gear ring 14, so that the grinding drum 16 cooperates with the descaling drum 3 rotating at the bottom to fully grind the inner wall of the recharge well pipe 4, thereby improving the overall dredging and maintenance effect of the device on the inner wall of the recharge well pipe 4.

[0046] In this embodiment, the smart terminal used to receive data from the temperature and humidity sensor 29, the high-definition camera 30 and the sonar probe 31 and to control the operation of the corresponding motor 20, the drilling rig 12 and the hydraulic push rod 13 is a smart terminal device such as a smart computer and a smart tablet computer. The motor 20, the drilling rig 12 and the hydraulic push rod 13 are all connected to the smart terminal through corresponding lines.

[0047] When using this embodiment, the traction rope is first fixed to the traction head 2, and then the mounting plate 1 is placed as a whole into the recharge well pipe 4 that needs maintenance through the traction equipment, and then the mounting plate 1 is pulled as a whole into the recharge well pipe 4 at a uniform speed by the traction equipment. The staff first fixes the connecting plate 28 inside the connecting sleeve 21 with bolts, and then the temperature and humidity sensor 29, high-definition camera 30 and sonar probe 31 arranged at the bottom of the connecting plate 28 can be used to detect the situation inside the recharge well pipe 4.

[0048] When the recharge water hole 5 corresponding to the inner wall of the recharge well pipe 4 is found to be blocked, since the distance between the high-definition camera 30 and the drill bit 10 is a fixed value, it is only necessary to pull the mounting plate 1 downward by a corresponding distance through a pulling device to move the drill bit 10 to the side of the blocked recharge water hole 5. Then, the drilling rig 12 and the hydraulic push rod 13 are controlled to operate simultaneously through the intelligent terminal on the well, so that the hydraulic push rod 13 stably pushes the rotating drill bit 10 forward to dredge the blocked recharge water hole 5. Then, the mounting plate 1 can be pulled upward by a corresponding distance through the traction device, so that the dredged recharge water hole 5 can be observed through the high-definition camera 30 to determine whether the recharge water hole 5 as a whole and the corresponding aquifer 6 on one side are completely dredged.

[0049] By controlling the motor 20 to drive the second rotating shaft 27 and the connecting plate 28 to rotate the corresponding angles at the same time, the high-definition camera 30 can rotate synchronously with the drill bit 10, allowing the high-definition camera 30 to comprehensively observe the internal situation of the recharge well pipe 4. At the same time, the drill bit 10 can rotate synchronously with the high-definition camera 30, and the angle of the drill bit 10 can be changed according to the dredging needs to dredge the recharge water holes 5 located at different positions on the inner wall of the recharge well pipe 4.

[0050] The water guide joint 26 can be connected to the water spraying equipment on the side of the wellhead through the corresponding water supply pipeline, so that water can be sprayed on the drilling part of the drill bit 10 through the nozzle 9, so that the rotating drill bit 10 can not only clear the blocked recharge water hole 5, but also drill a new recharge water hole 5 on the inner wall of the recharge well pipe 4 as needed, and connect the recharge well pipe 4 with the new aquifer 6, so as to facilitate the adaptive transformation of the underground structure of the recharge well by the overall device.

[0051] When it is necessary to clean and dredge the scale inside the reinjection well pipe 4, first remove the connecting plate 28 fixed to the inner wall of the connecting sleeve 21 by bolts, and at the same time pull out the lines connected to the hydraulic push rod 13 and the drilling rig 12, then insert the descaling drum 3 as a whole into the connecting sleeve 21 and fix it with bolts, and then the mounting plate 1 can be pulled downward into the reinjection well pipe 4 as a whole, and then the motor 20 is controlled by the intelligent terminal to drive the first rotating shaft 25 to rotate. When the first rotating shaft 25 rotates, it will drive the rotating column 24 and the connector 18 to rotate through the transmission belt, thereby driving the descaling drum 3 fixed on the inner wall of the connecting sleeve 21 to rotate, and the scale attached to the inner wall of the reinjection well pipe 4 is polished and dredged by rotating the descaling drum 3.

[0052] Example 2:

[0053] A device for underground structural transformation and channel maintenance of sandstone thermal reservoirs, such as Figure 6As shown, this embodiment makes the following improvements on the basis of embodiment 1: the inner wall of the connecting sleeve 21 is fixed with a spiral conveying rod 34 by bolts, the outer wall of the spiral conveying rod 34 is rotatably connected to the fixed pipe 33, and a plurality of fixing rods 32 are fixed to the outer wall of the top of the fixed pipe 33, and the fixing rods 32 are fixed to the outer wall of the annular gear ring 17 by screws; after the staff has cleaned the scale on the inner wall of the recharge well pipe 4 through the descaling roller 3 and the grinding roller 16, the telescopic rod 19 and the descaling roller 3 can be removed from the bottom of the mounting plate 1, and then the spiral conveying rod 34 is fixed to the inner wall of the connecting sleeve 21, and the fixing pipe 33 is fixed by screws and the fixing rod 32. The whole is fixed at the bottom of the mounting plate 1, and then the mounting plate 1 can be put into the recharging well pipe 4 again, and then the motor 20 is controlled by the intelligent terminal to drive the spiral conveying rod 34 at the bottom of the connecting sleeve 21 to rotate, and the residue accumulated when cleaning the scale inside the recharging well pipe 4 is transported to the inside of the fixed pipe 33 through the rotating spiral conveying rod 34, and then the mounting plate 1 is pulled out of the recharging well pipe 4, and the staff can recycle the residue collected in the fixed pipe 33, avoiding the accumulation of a large amount of residue generated when cleaning the scale at the bottom of the recharging well pipe 4, thereby further improving the cleaning, maintenance and dredging effect of the overall device on the recharging well.

[0054] When this embodiment is in use, the spiral conveying rod 34 is fixed to the inner wall of the connecting sleeve 21, and the fixed pipe 33 is fixed as a whole to the bottom of the mounting plate 1 by screws and the fixing rod 32. Then, the mounting plate 1 can be placed into the recharging well pipe 4 again, and then the motor 20 is controlled by the intelligent terminal to drive the spiral conveying rod 34 at the bottom of the connecting sleeve 21 to rotate, and the residue accumulated when cleaning the scale inside the recharging well pipe 4 is transported to the inside of the fixed pipe 33 through the rotating spiral conveying rod 34. Then, the mounting plate 1 is pulled out of the recharging well pipe 4, and the staff can recycle the residue collected in the fixed pipe 33.

[0055] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A sandstone thermal reservoir downhole structure transformation and channel maintenance device, comprising a mounting plate (1), characterized in that: A motor (20) is fixed to the outer wall at the bottom of the mounting plate (1), and a first rotating shaft (25) is fixed to the output shaft of the motor (20). The first rotating shaft (25) passes through the outer wall at the top of the mounting plate (1). The outer wall at the top of the mounting plate (1) is rotatably connected to a second rotating shaft (27). The second rotating shaft (27) is transmission-connected to the first rotating shaft (25) via a transmission belt. A guide plate (11) is fixed to the outer wall at the top of the second rotating shaft (27). A drilling rig (12) is slidably connected to the inner wall of the guide plate (11). The output shaft of the drilling rig (12) is connected to the drill bit (10) via a coupling. A group of hydraulic push rods (13) are fixed to the outer wall of the guide plate (11), and the output shaft of the hydraulic push rod (13) is fixed to the outer wall of one side of the drilling rig (12).

2. The device for underground structure reconstruction and channel maintenance of sandstone thermal reservoir according to claim 1, characterized in that: The outer wall of the bottom of the mounting plate (1) is rotatably connected to a rotating column (24), a second transmission wheel (23) is fixed to the outer wall of the rotating column (24), a first transmission wheel (22) is fixed to the outer wall of the first rotating shaft (25), the first transmission wheel (22) and the second transmission wheel (23) are connected via a transmission belt, a connector (18) is fixed to the outer wall of the bottom of the rotating column (24), a connecting sleeve (21) is fixed to the outer wall of the bottom of the connecting head (18), and a descaling roller (3) is fixed to the inner wall of the connecting sleeve (21) via bolts.

3. The device for underground structure reconstruction and channel maintenance of sandstone thermal reservoir according to claim 2, characterized in that: A connecting plate (28) is fixed to the inner wall of the connecting sleeve (21) by bolts, and a sonar probe (31), a high-definition camera (30) and a temperature and humidity sensor (29) are arranged on the outer wall of the bottom of the connecting plate (28).

4. The device for underground structure reconstruction and channel maintenance of sandstone thermal reservoir according to claim 2, characterized in that: Traction heads (2) are respectively fixed at the four corners of the top outer wall of the mounting plate (1).

5. The device for underground structure reconstruction and channel maintenance of sandstone thermal reservoir according to claim 1, characterized in that: A nozzle (9) is fixed on the outer wall of the bottom of the guide plate (11), and a water guide joint (26) is plugged into an input end on one side of the nozzle (9), and the water guide joint (26) is fixed on the outer wall of the bottom of the guide plate (11).

6. The device for underground structure reconstruction and channel maintenance of sandstone thermal reservoir according to claim 4, characterized in that: A plurality of support frames (8) are fixed to the outer wall of the mounting plate (1), and the support frames (8) are slidably connected to the inner wall of the recharging well pipe (4).

7. The device for underground structure reconstruction and channel maintenance of sandstone thermal reservoir according to claim 2, characterized in that: The outer wall of the connecting head (18) is fixed with a plurality of telescopic rods (19) by bolts, the telescopic ends of the telescopic rods (19) are fixed with a connecting frame (15), and the inner wall of the connecting frame (15) is rotatably connected with a grinding roller (16).

8. The device for underground structure reconstruction and channel maintenance of sandstone thermal reservoir according to claim 7, characterized in that: A gear ring (14) is fixed to the top outer wall of the grinding drum (16), and the gear ring (14) passes through the top outer wall of the connecting frame (15).

9. The device for underground structure reconstruction and channel maintenance of sandstone thermal reservoir according to claim 6, characterized in that: An annular gear ring (17) is fixed to the outer wall of the bottom of the support frame (8), and the gear ring (14) is meshedly connected with the annular gear ring (17).

10. The device for underground structure reconstruction and channel maintenance of sandstone thermal reservoir according to claim 3, characterized in that: The inner wall of the connecting sleeve (21) is fixed with a spiral conveying rod (34) by means of bolts, the outer wall of the spiral conveying rod (34) is rotatably connected with a fixing tube (33), a plurality of fixing rods (32) are fixed to the outer wall of the top of the fixing tube (33), and the fixing rods (32) are fixed to the outer wall of the annular gear ring (17) by means of screws.

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