Efficient extraction equipment of deep geothermal exploitation well

Abstract

The invention belongs to the technical field of geothermal energy development and utilization, and particularly relates to efficient extraction equipment for a deep geothermal exploitation well, which comprises a plurality of water pumping devices, the plurality of water pumping devices are sequentially communicated in series through a plurality of extension pipe fittings, and the water pumping device close to a wellhead is fixedly connected with a steel wire rope on hoisting equipment; the water pumping device comprises a water pumping mechanism, a well cementation assembly and a guide mechanism, the outer wall of the water pumping mechanism is sleeved with the well cementation assembly, the well cementation assembly is used for making friction contact with the well wall so as to keep the working position of the water pumping mechanism in a well, and the guide mechanism is arranged at the bottom end of the water pumping mechanism and used for guiding the water pumping mechanism to work. And the guide mechanism is used for smoothly lowering the water pumping mechanism into the well and keeping the water pumping mechanism coaxial with the well body. It is guaranteed that the water pumping mechanism is stably fixed in a well, smoothly lowered to the bottom of the well and always coaxially positioned with the well body, and the stability of extraction operation is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of geothermal energy development and utilization, and particularly relates to a high-efficiency pumping equipment for a deep geothermal exploitation well. BACKGROUND

[0002] There are rich underground water resources in the closed mine, and the underground water is exploited and utilized, such as used for power generation, heating and refrigeration for residential areas, and the like, which has significant practical application value. In view of the conditions of different depths of the underground, the water temperature of the shallow underground water is relatively low, and with the increase of the depth, the water temperature of the underground water gradually increases. Therefore, the geothermal resources contained in the deep underground water have higher value in utilization, especially when the depth reaches thousands of meters or more, the exploitable value is more prominent. However, due to the limitation of the current water pump lift and the unstable pumping operation, it is difficult to exploit from such a deep underground.

[0003] Therefore, it is necessary to provide a high-efficiency pumping equipment for a deep geothermal exploitation well to overcome this technical problem. SUMMARY

[0004] The present application aims to provide a high-efficiency pumping equipment for a deep geothermal exploitation well to solve the problems existing in the prior art.

[0005] To achieve the above-mentioned purpose, the present application provides a high-efficiency pumping equipment for a deep geothermal exploitation well, comprising a plurality of water pumping devices, a plurality of the water pumping devices are connected in series through a plurality of extension pipes, and the water pumping device close to the wellhead is fixedly connected with a steel wire rope on a hoisting equipment; the water pumping device comprises a water pumping mechanism, a well cementing assembly and a guiding mechanism, the well cementing assembly is sleeved on the outer wall of the water pumping mechanism, the well cementing assembly is used for frictional contact with the well wall to keep the working position of the water pumping mechanism in the well, and the guiding mechanism is arranged at the bottom end of the water pumping mechanism and is used for smoothly lowering the water pumping mechanism into the well and keeping coaxial with the well body.

[0006] Preferably, the water pumping mechanism comprises a water tank, the water tank is a cylinder, a vertical pipe is fixedly connected to the middle part of the water tank, one end of the vertical pipe penetrates the top wall of the water tank and is connected with one of the extension pipes, the other end of the vertical pipe penetrates the bottom wall of the water tank and is connected with another of the extension pipes, and a water pumping assembly is arranged in the water tank, and the water outlet end of the water pumping assembly is communicated with the vertical pipe.

[0007] Preferably, a partition is arranged in the riser, the riser is divided into an upper cavity and a lower cavity by the partition, a plurality of water outlets are formed in the lower part of the outer wall of the riser and communicate with the lower cavity, the water pumping assembly comprises a water pump installed in the middle part of the water tank, the water outlet end of the water pump is connected to the upper cavity through a conduit, the upper cavity is connected to the lower cavity of the riser above through the extension pipe, and an exhaust valve is arranged on the top of the water tank.

[0008] Preferably, the extension pipe comprises an extension pipe, and a pipe joint is arranged between every two adjacent risers, and the two pipe joints are threadedly connected through the extension pipe.

[0009] Preferably, the well cementing assembly comprises an annular air bag fixedly sleeved on the water tank, and a gas supply assembly is connected to the annular air bag.

[0010] Preferably, the guiding mechanism comprises a fixing seat fixedly sleeved on the bottom of the riser, a plurality of swing rods are hingedly connected to the fixing seat, the swing rods are arranged at equal intervals in the circumferential direction of the riser, universal wheels are arranged at the ends of the swing rods away from the fixing seat, and a reset assembly is arranged on the riser and used for synchronously placing the swing rods in an upwardly inclined state.

[0011] Preferably, the reset assembly comprises a sliding sleeve slidably sleeved on the lower part of the riser, the sliding sleeve is arranged above the fixing seat, one end of each of a plurality of connecting rods is hingedly connected to the sliding sleeve at equal intervals in the circumferential direction, the other end of each of the connecting rods is hingedly connected to the swing rod, a spring is slidably sleeved on the riser and located between the sliding sleeve and the fixing seat.

[0012] Preferably, a piston piece is slidably and sealingly sleeved on the riser, the piston piece is slidably and sealingly matched with the inner wall of the water tank, a plurality of jacks are connected to the bottom end of the piston piece, the jacks penetrate through the bottom wall of the water tank and abut against the top end of the sliding sleeve.

[0013] Preferably, the piston piece comprises a piston plate slidably and sealingly sleeved on the riser, and a sealing ring is arranged between the piston plate and the water tank.

[0014] Preferably, a water taking pipe is connected to the bottom end of the riser of the water pumping device close to the well bottom, the water taking pipe extends into the water in the well bottom, and a flange is arranged on the top end of the riser of the other water pumping device close to the well mouth and connected to an upper water pipeline through the flange.

[0015] Compared with the prior art, the present application has the following advantages and technical effects: The application provides a high-efficiency pumping device for a deep geothermal exploitation well, and provides an overall scheme architecture for solving the deep geothermal exploitation problem. By connecting multiple water pumping devices in series, the current water pump lift limit can be broken through, the rich geothermal resources contained in underground water at different depths, especially at depths of more than 1,000 meters, can be pumped, and the actual application requirements such as power generation, residential heating and refrigeration can be met, and the exploitable value of deep geothermal resources is improved. At the same time, through the setting of the well cementing assembly and the guide mechanism, the stability and fixation of the water pumping mechanism in the well, the smooth placement at the bottom of the well and the coaxial positioning with the well body at all times are ensured, which helps to improve the stability of the pumping operation. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor under the premise of the drawings: Fig. 1 The application provides a high-efficiency pumping device for a deep geothermal exploitation well, and provides an overall scheme architecture for solving the deep geothermal exploitation problem. By connecting multiple water pumping devices in series, the current water pump lift limit can be broken through, the rich geothermal resources contained in underground water at different depths, especially at depths of more than 1,000 meters, can be pumped, and the actual application requirements such as power generation, residential heating and refrigeration can be met, and the exploitable value of deep geothermal resources is improved. At the same time, through the setting of the well cementing assembly and the guide mechanism, the stability and fixation of the water pumping mechanism in the well, the smooth placement at the bottom of the well and the coaxial positioning with the well body at all times are ensured, which helps to improve the stability of the pumping operation. Fig. 2 The application provides a high-efficiency pumping device for a deep geothermal exploitation well, and provides an overall scheme architecture for solving the deep geothermal exploitation problem. By connecting multiple water pumping devices in series, the current water pump lift limit can be broken through, the rich geothermal resources contained in underground water at different depths, especially at depths of more than 1,000 meters, can be pumped, and the actual application requirements such as power generation, residential heating and refrigeration can be met, and the exploitable value of deep geothermal resources is improved. At the same time, through the setting of the well cementing assembly and the guide mechanism, the stability and fixation of the water pumping mechanism in the well, the smooth placement at the bottom of the well and the coaxial positioning with the well body at all times are ensured, which helps to improve the stability of the pumping operation. Wherein: 1, water taking pipe; 2, extension pipe; 3, universal wheel; 4, water tank; 5, annular air bag; 6, vertical pipe; 7, flange; 8, steel wire rope; 9, air pump; 10, hoisting equipment; 11, pipe joint; 12, fixed seat; 13, spring; 14, sliding sleeve; 15, top rod; 16, water pump; 17, partition plate; 18, water inlet; 19, water outlet; 20, piston plate; 21, sealing ring; 22, connecting rod; 23, swing rod. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the application will be described below in a clear and complete manner with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0018] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the application will be further described in detail below with reference to the drawings and specific embodiments.

[0019] The hoisting equipment in the embodiments will be described as follows: Hoisting equipment is usually composed of a power system, a transmission system, a lifting mechanism, a walking mechanism, a control system, and auxiliary components. Its working principle is based on the coordination of motor drive, mechanical transmission, and electrical control to achieve the lifting, movement, and positioning of heavy objects.

[0020] Generally powered by an electric motor, the motor converts electrical energy into mechanical energy through a drive gear box or other transmission devices to provide power support for the overall movement of the hoisting equipment and the lifting of heavy objects.

[0021] Transmission system: including gear box, reducer, coupling and other components. They transmit the power generated by the motor to the walking mechanism and the lifting mechanism to achieve speed adjustment and torque conversion.

[0022] Lifting mechanism: is the core part of the hoisting equipment, mainly composed of lifting arm, steel wire rope, pulley, reducer, etc.

[0023] The lifting arm is the main load-bearing component of the lifting mechanism, which allows extension and rotation to adapt to different heights and angles of lifting requirements.

[0024] The steel wire rope is guided by the pulley set to convert the power generated by the motor into pulling force or lifting force on the heavy object.

[0025] Walking mechanism: including walking wheel, walking shaft, reducer and other components, they realize the forward, backward and turning of the hoisting equipment through the precise cooperation of gears and chains. Under the drive of the motor, the walking mechanism can flexibly move in the working area to provide necessary position adjustment for the lifting operation.

[0026] Control system: is the command center of the whole hoisting equipment, receiving operation instructions through input devices such as joysticks, buttons, remote controls or automatic control software.

[0027] The control system can accurately control the actions of the motor, walking mechanism and lifting mechanism to ensure the accuracy and safety of the lifting operation.

[0028] At the same time, the control system also provides necessary safety protection functions such as overload protection, limit protection, etc.

[0029] Auxiliary components: including various rigging, lifting gear, balancing device, safety device, etc., which are used to assist lifting operation, improve lifting efficiency and safety.

[0030] Working principle of hoisting equipment: After the motor starts, the power is transmitted to the walking mechanism and the lifting mechanism through the transmission system. The walking mechanism moves to the designated position according to the operation instruction to prepare for the lifting operation.

[0031] The lifting mechanism lifts the heavy object through the steel wire rope and pulley block. The motor converts electrical energy into mechanical energy through the speed reducer to drive the steel wire rope to slide on the pulley to realize the lifting of the heavy object.

[0032] The walking mechanism moves according to the operation instruction to drive the heavy object to move in the horizontal direction. The lifting arm of the lifting mechanism can be telescopic and rotatable to realize the accurate positioning of the heavy object in the vertical and horizontal directions.

[0033] When the heavy object reaches the specified position, the lifting mechanism slowly lowers the heavy object through the steel wire rope and pulley block. The control system ensures the stability and accuracy of the placement of the heavy object.

[0034] During the entire lifting process, the control system monitors the running state of the equipment and the weight of the heavy object in real time. When abnormal conditions such as overload and limit are detected, the control system immediately starts the safety protection function to ensure the safety of the equipment and personnel.

[0035] Referring to Figs. 1-2 As shown in the figure, the present application provides a kind of high-efficiency extraction equipment of deep geothermal exploitation well, including multiple water pumping devices, multiple water pumping devices are sequentially connected by multiple extension pipe fittings, water pumping device close to wellhead is fixedly connected with steel wire rope 8 on hoisting equipment 10;Water pumping device includes water pumping mechanism, cementing assembly and guide mechanism, cementing assembly is sleeved on the outer wall of water pumping mechanism, cementing assembly is used for frictional contact with well wall, to keep the working position of water pumping mechanism in well, guide mechanism is arranged at the bottom end of water pumping mechanism, guide mechanism is used to smoothly lower water pumping mechanism to well and keep coaxial with well body.

[0036] The present application provides an overall scheme architecture to solve the problem of deep geothermal exploitation. By connecting multiple water pumping devices, the current pump lift limit can be broken through, and the rich geothermal resources in underground water at different depths, especially above 1000 meters, can be extracted, meeting the actual application needs of power generation, residential heating and refrigeration, and improving the exploitable value of deep geothermal resources. At the same time, through the setting of cementing assembly and guide mechanism, the stability and fixation of water pumping mechanism in well are ensured, and the smooth lowering to the bottom of well and the coaxial positioning with well body are ensured, which helps to improve the stability of extraction operation.

[0037] Further, the water pumping mechanism includes a water tank 4, the water tank 4 is a cylinder, the water tank 4 is fixedly connected with a vertical pipe 6 at the middle part, one end of the vertical pipe 6 penetrates the top wall of the water tank 4 and is connected with one extension pipe fitting, the other end of the vertical pipe 6 penetrates the bottom wall of the water tank 4 and is connected with another extension pipe fitting, a water pumping assembly is arranged in the water tank 4, and the water outlet end of the water pumping assembly is communicated with the vertical pipe 6.

[0038] The water tank 4 is the main body of the water pumping mechanism and provides installation space for the water pumping assembly. The stand pipe 6 penetrates the top wall and the bottom wall of the water tank 4 and is connected with the extension pipe, so that multiple water pumping devices can be connected in series. The water pumping assembly pumps the water in the water tank 4 into the stand pipe 6 and then into the water tank 4 above, so that the geothermal water is pumped step by step.

[0039] Further, the stand pipe 6 is provided with a partition plate 17. The stand pipe 6 is divided into an upper cavity and a lower cavity by the partition plate 17. A plurality of water outlets 19 are formed in the lower part of the outer wall of the stand pipe 6 and are in communication with the lower cavity. The water pumping assembly includes a water pump 16 installed in the middle part of the water tank 4. The water outlet of the water pump 16 is connected with the upper cavity through a conduit. The upper cavity is in communication with the lower cavity of the stand pipe 6 above through the extension pipe. An exhaust valve is arranged on the top of the water tank 4.

[0040] In this embodiment, a water receiving port 18 is arranged on the upper part of the stand pipe 6 and is in communication with the upper cavity, so as to be connected with the conduit.

[0041] The partition plate 17 divides the stand pipe 6 into the upper cavity and the lower cavity. The water pump 16 pumps the water into the upper cavity and then into the lower cavity of the stand pipe 6 above through the extension pipe, so that the geothermal water is transferred between different water pumping devices. The water outlet 19 allows the water in the lower cavity to flow out of the stand pipe 6. The exhaust valve can exhaust the gas in the water tank 4, so as to ensure the stability of the water pumping process.

[0042] Further, the extension pipe includes an extension pipe 2. Pipe joints 11 are arranged between adjacent two stand pipes 6. The two pipe joints 11 are threadedly connected through the extension pipe 2.

[0043] The two pipe joints 11 are threadedly connected through the extension pipe 2, so as to facilitate the connection and disconnection of the adjacent two stand pipes 6 and the installation of the equipment, so that the water pumping devices can be lowered into the well one by one.

[0044] Further, the well cementing assembly includes an annular air bag 5 fixedly sleeved on the water tank 4. The annular air bag 5 is in communication with a gas supply assembly.

[0045] In this embodiment, the gas supply assembly includes an air pump 9. The plurality of annular air bags 5 are in communication with the air pump 9 through air tubes. In the actual installation process, the cable and the air tube can be placed in the stand pipe 6, so as to prevent them from being abraded by the well wall rock.

[0046] The annular air bag 5 is fixedly sleeved on the water tank 4. After being in communication with the gas supply assembly, the annular air bag 5 can be inflated to fix the water pumping mechanism in the well, so as to prevent the water pumping mechanism from shaking in the well and ensure the stability of the water pumping equipment.

[0047] Further, the guiding mechanism comprises a fixed seat 12 fixedly sleeved at the bottom of the stand pipe 6, a plurality of swing rods 23 are hinged on the fixed seat 12, the plurality of swing rods 23 are equidistantly arranged along the circumference of the stand pipe 6, a universal wheel 3 is installed at the end of the swing rod 23 away from the fixed seat 12, and the stand pipe 6 is provided with a reset assembly for synchronously placing the plurality of swing rods 23 in the upward inclined state.

[0048] The fixed seat 12 is hinged with the plurality of swing rods 23 equidistantly arranged along the circumference of the stand pipe 6, and the swing rod 23 is installed with the universal wheel 3 at the end, when the water pumping mechanism is lowered, the universal wheel 3 is in contact with the well wall, the water pumping mechanism can be smoothly lowered into the well, and the universal wheel 3 can keep coaxial with the well body, reduce the friction and jam in the lowering process; in addition, the reset assembly is arranged to synchronously place the plurality of swing rods 23 in the upward inclined state when the water pumping mechanism is lowered, and ensure smooth passing when the well body is locally narrow.

[0049] Further, the reset assembly comprises a sliding sleeve 14 slidingly sleeved at the lower part of the stand pipe 6, the sliding sleeve 14 is located above the fixed seat 12, a plurality of one ends of connecting rods 22 are equidistantly hinged on the sliding sleeve 14 in the circumferential direction, the other ends of the connecting rods 22 are correspondingly hinged on the swing rods 23, and the stand pipe 6 is slidingly sleeved with a spring 13 between the sliding sleeve 14 and the fixed seat 12.

[0050] The plurality of swing rods 23 are synchronously placed in the upward inclined state by the elastic force of the spring 13, which is convenient for lowering; after the water pumping mechanism reaches the specified position, the positions of the swing rods 23 and the universal wheel 3 are stable.

[0051] Further, the stand pipe 6 is slidingly and sealingly sleeved with a piston piece, the piston piece is slidingly and sealingly matched with the inner wall of the water tank 4, the bottom end of the piston piece is connected with a plurality of jacks 15, the jacks 15 penetrate through the bottom wall of the water tank 4 and abut against the top end of the sliding sleeve 14.

[0052] With the continuous increase of the water level on the piston piece, the piston piece slides downward under the gravity of the water and pushes the jacks 15 to push the sliding sleeve 14 to move downward along the stand pipe 6 against the elastic force of the spring 13, the swing rods 23 are pushed downward through the connecting rods 22, and then the universal wheel 3 is pressed against the well wall to realize stable fixing, it should be noted that the water outlet 19 is always located above the piston piece.

[0053] Further, the piston piece comprises a piston plate 20 slidingly and sealingly sleeved on the stand pipe 6, and a sealing ring 21 is arranged between the piston plate 20 and the water tank 4.

[0054] The sealing ring 21 can enhance the sealing property between the piston piece and the water tank 4, prevent the water in the water tank 4 from leaking, and ensure the normal operation of the water pumping mechanism.

[0055] Further, the bottom end of the stand pipe 6 of the water pumping device near the well bottom is connected with the water taking pipe 1, the water taking pipe 1 extends into the water at the well bottom, the top end of the stand pipe 6 of the other water pumping device near the well mouth is provided with the flange 7 and is connected with the upper water pipe through the flange 7.

[0056] The bottom end of the stand pipe 6 of the water pumping device near the well bottom is connected with the water taking pipe 1 and extends into the water at the well bottom, the top end of the stand pipe 6 of the other water pumping device near the well mouth is provided with the flange 7 and is connected with the upper water pipe through the flange 7, which is convenient for connecting with the upper water pipe and conveying the extracted geothermal water to the ground for utilization.

[0057] The working principle of the high-efficiency extraction equipment of the deep geothermal exploitation well is as follows: the bottom end of the stand pipe 6 of the first water pumping device is connected with the water taking pipe 1, then a lengthening pipe 2 is screwed at the top end of the stand pipe 6, then the top end of the lengthening pipe 2 is connected with the bottom end of the stand pipe 6 of the second water pumping device, then the lengthening pipe 2 is lowered into the well, and is temporarily fixed by the clamps on the hoisting device 10 during the lowering process, when the next water pumping device is connected, the lengthening pipe 2 is lowered one by one, when the connection of all the water pumping devices is completed, the steel wire rope 8 on the hoisting device 10 is connected and fixed, then the water pumps 16 are started one by one from bottom to top, as the water level in the water tank 4 continuously increases, the piston member slides downward under the gravity of the water, and pushes the top rod 15 to push the sliding sleeve 14 to overcome the elastic force of the spring 13 and move downward along the stand pipe 6, the movement is transmitted to the swing rod 23 through the connecting rod 22, the swing rod 23 rotates downward, and then drives the universal wheel 3 to press the well wall, so that the stable fixing is realized, finally the air pump 9 is started to inflate the annular air bag 5, and the inflation can fix the water tank 4 in the well, so that the water pumping mechanism is prevented from shaking in the well, the stability of the extraction equipment is ensured, and then the step-by-step extraction of the geothermal water is realized.

[0058] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0059] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any changes or replacements within the technical range disclosed by the present application can be easily thought by those skilled in the art, and should be covered in the protection scope of the present application.

Claims

1. A high-efficiency extraction apparatus for a deep geothermal exploitation well, characterized in that, The application relates to a water pumping device, which comprises multiple water pumping devices connected in series through multiple extension pipes, wherein the water pumping device close to the well mouth is fixedly connected with a steel wire rope (8) on a hoisting device (10); the water pumping device comprises a water pumping mechanism, a well cementing assembly and a guiding mechanism; the well cementing assembly is sleeved on the outer wall of the water pumping mechanism and is used for frictionally contacting with the well wall to keep the working position of the water pumping mechanism in the well; and the guiding mechanism is arranged at the bottom end of the water pumping mechanism and is used for smoothly lowering the water pumping mechanism into the well and keeping the coaxiality with the well body.

2. The apparatus for efficient extraction of a deep geothermal well according to claim 1, characterized in that, The water pumping mechanism comprises a water tank (4), the water tank (4) is a cylinder, a riser (6) is fixedly connected to the middle part of the water tank (4), one end of the riser (6) penetrates through the top wall of the water tank (4) and is connected with one extension pipe, the other end of the riser (6) penetrates through the bottom wall of the water tank (4) and is connected with another extension pipe, and a water pumping assembly is arranged in the water tank (4) and communicates with the riser (6) at the water outlet end.

3. The apparatus for efficient extraction of a deep geothermal well according to claim 2, characterized in that, A partition plate (17) is arranged in the riser (6), the riser (6) is divided into an upper cavity and a lower cavity by the partition plate (17), a plurality of water outlets (19) are formed in the lower part of the outer wall of the riser (6) and communicate with the lower cavity, the water pumping assembly comprises a water pump (16) installed in the middle part of the water tank (4), the water outlet end of the water pump (16) communicates with the upper cavity through a pipeline, the upper cavity communicates with the lower cavity of the riser (6) above through the extension pipe, and an exhaust valve is arranged at the top of the water tank (4).

4. The high-efficiency extraction equipment for deep geothermal wells according to claim 2, characterized in that, The extension pipe comprises an extension pipe (2), a pipe joint (11) is arranged between two adjacent risers (6), and the two pipe joints (11) are threadedly connected through the extension pipe (2).

5. The apparatus for efficient extraction of a deep geothermal well according to claim 2, characterized in that, The well cementing assembly comprises an annular air bag (5) fixedly sleeved on the water tank (4), and a gas supply assembly is arranged in the annular air bag (5).

6. The apparatus for efficient extraction of a deep geothermal well according to claim 2, characterized in that, The guiding mechanism comprises a fixing seat (12) fixedly sleeved on the bottom of the riser (6), a plurality of swing rods (23) are hingedly connected to the fixing seat (12), the swing rods (23) are equidistantly arranged along the circumference of the riser (6), universal wheels (3) are arranged at the ends of the swing rods (23) away from the fixing seat (12), a reset assembly is arranged on the riser (6), and the reset assembly is used for synchronously keeping the swing rods (23) in an upwardly inclined state.

7. The apparatus for efficient extraction of a deep geothermal well according to claim 6, characterized in that, The reset assembly comprises a sliding sleeve (14) slidingly sleeved on the lower part of the riser (6), the sliding sleeve (14) is located above the fixing seat (12), one end of a plurality of connecting rods (22) is equidistantly hingedly connected to the sliding sleeve (14) in the circumferential direction, the other end of the connecting rods (22) is hingedly connected to the swing rods (23), a spring (13) is slidingly sleeved on the riser (6), and the spring (13) is located between the sliding sleeve (14) and the fixing seat (12).

8. The apparatus for efficient extraction of a deep geothermal well according to claim 7, characterized in that, The piston piece is in sliding sealing fit with the inner wall of the water tank (4), and the bottom end of the piston piece is connected with a plurality of jacks (15) which penetrate through the bottom wall of the water tank (4) and abut against the top end of the sliding sleeve (14).

9. The apparatus for efficient extraction of a deep geothermal well according to claim 8, characterized in that, The piston piece comprises a piston plate (20) which is in sliding sealing fit on the riser (6), and a sealing ring (21) is arranged between the piston plate (20) and the water tank (4).

10. The apparatus for efficient extraction of a deep geothermal well according to claim 2, characterized in that, The bottom end of the riser (6) of the water pumping device close to the well bottom is connected with a water taking pipe (1) which extends into the water at the well bottom, and the top end of the riser (6) of the other water pumping device close to the well mouth is provided with a flange (7) and connected with the upper water pipeline through the flange (7).

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