Skid-mounted device for testing heat exchange capacity of mid-deep geothermal well

Abstract

The utility model discloses a skid-mounted device for testing the heat exchange capacity of a mid-deep geothermal well, which is characterized in that an energy unit module is used for providing a set cold and heat source with certain flow and constant temperature to simulate the actual operation condition of a user side, and during testing, only one mid-deep heat exchange well needs to be drilled and is connected with a mid-deep coaxial sleeve heat exchange well tube, so that the test efficiency is improved. A closed loop is formed, the heat exchange capacity of the geothermal well can be accurately displayed or calculated, punctual and effective information and data are provided for follow-up project function design, and the method can be used for water leakage quality detection of the coaxial sleeve geothermal well. According to the utility model, the energy supply hydraulic module and the heat exchange hydraulic module are respectively provided with an intelligent electromagnetic or ultrasonic heat meter, a flowmeter, a thermometer and a pressure gauge, so that on-site recording and timely, accurate and remote transmission to a control center can be realized, and the heat exchange capability of a middle-deep layer coaxial tube heat exchange well in a mode that a middle-deep layer coaxial tube heat exchange system absorbs heat to soil in winter can be really simulated; and the heat absorption capacity of the underground rock soil is tested and calculated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of middle-deep geothermal well testing, and particularly relates to a prying-mounted middle-deep geothermal well heat exchange capacity testing device. BACKGROUND

[0002] In recent years, geothermal energy as a clean and renewable energy has been widely popularized and applied, but is influenced by factors such as region, climate environment, crustal geothermal field and underground aquifer, and there is certain limitation in popularization and application of middle-deep geothermal heating technology, so that in-situ geothermal energy thermophysical property testing technology emerges as the times require in order to further study the heat exchange capacity of middle-deep geothermal well.

[0003] Sweden, Germany, the United States, Switzerland and other developed countries in Europe and the United States have developed in-situ geothermal energy thermophysical property testing equipment, and many of the equipment has been popularized and applied on a large scale. The research on in-situ geothermal energy thermophysical property testing equipment in China started relatively late, but now a variety of forms of testing equipment have been independently developed, and a large amount of data and rich practical experience have been accumulated.

[0004] At present, the geothermal energy thermophysical property testing equipment mainly aims at the thermophysical property testing of shallow strata, and there is no matching heat exchange capacity testing instrument for middle-deep coaxial casing geothermal well, so that the shallow testing instrument can only be used at present, or an energy meter is used for rough detection. The shallow testing instrument cannot adapt to a stable energy providing device, and only one energy instrument is usually provided, but the measurement data is inaccurate, the correct ground heat data cannot be provided for the construction unit, the construction party can only construct vaguely, and subsequent heating failure and instability and other problems are prone to occur. In view of the fact that the middle-deep geothermal application is more and more widely used in China at present, the corresponding testing technology and testing equipment are particularly important.

[0005] Therefore, for those skilled in the art, it is urgent to design a precise, stable, reliable and convenient testing device at present, and the heat exchange capacity of middle-deep well in different regions and different underground soil heat exchange layers is researched, so that real and reliable data basis can be provided for subsequent geothermal refrigeration and heating engineering project design, and the experimental project test data are calculated and analyzed, and the middle-deep geothermal energy sustainable development and application technology database is gradually improved. UTILITY MODEL CONTENT

[0006] In order to achieve the above technical purpose, the utility model adopts the following scheme:

[0007] A pry-mounted middle-deep geothermal well heat exchange capacity testing device injects water of a certain temperature and flow rate into the outer wellbore of a coaxial casing type middle-deep geothermal well, the water exchanges heat with the crust soil, sand and water around the well wall of the geothermal well and flows out of the geothermal well from the inner wellbore of the geothermal well, the water quantity, temperature, heat comparison analysis and logical calculation of the water flowing into and out of the geothermal well are carried out by the testing device system workstation, and the energy difference of the water flowing into and out of the geothermal well per unit time is calculated to determine the heat exchange capacity and heat exchange efficiency of the geothermal well.

[0008] A pry-mounted middle-deep geothermal well heat exchange capacity testing device, which is a cold and hot source self-supply type integrated assembly type overall pry-mounted structure, has a modular size design according to the transportable size of a container and a motorized transport vehicle, and is convenient for transportation and on-site hoisting, disassembly, assembly; the pry-mounted structure comprises a power supply unit module, a power supply hydraulic module, a control center, a transduction water tank, a heat exchange hydraulic module, a geothermal well, a water lifting pump and quick couplings;

[0009] The power supply unit module and the power supply hydraulic module are connected through the quick couplings, the power supply hydraulic module and the transduction water tank are connected through the quick couplings, the transduction water tank and the heat exchange hydraulic module are connected through the quick couplings, and the heat exchange hydraulic module and the geothermal well are connected through the quick couplings;

[0010] The control center is a testing device workstation or a computer remote control system, which is connected with a power supply module controller and a heat exchange side controller through a control signal line to form a middle-deep geothermal well testing device control system for analyzing, measuring, monitoring and calculating information data transmitted or collected by the module controllers;

[0011] The power supply unit is an air source cold and hot water heat pump unit, which can realize refrigeration and heating function conversion under all-weather environmental conditions and provide cold and hot water sources for the geothermal well;

[0012] The power supply hydraulic module is a pry-mounted overall assembly structure, which comprises a power supply side heat energy meter, a thermometer, a pressure gauge, a pressure sensor, an electromagnetic flowmeter, a check valve, a filter, an adjusting valve, a power supply module controller, a power supply pump, a water supply pipeline, a return water pipeline, an elbow and a flange;

[0013] The transduction water tank is a heat preservation water tank, which is divided into a water supply tank and a return water tank by an intermediate partition plate; an upright flow buffering partition plate is arranged in the middle of the water supply tank and the return water tank to buffer the water flow pressure of the water supply pipeline and the geothermal return water pipeline in the water supply tank and the water flow pressure of the return water pipeline and the geothermal outlet water pipeline in the return water tank;

[0014] The heat exchange hydraulic module is a pry-mounted integral assembly structure, comprising a geothermal side heat energy meter, a thermometer, an electromagnetic flow meter, a check valve, a filter, an adjusting valve, a pressure gauge, a pressure sensor, a temperature sensor, a geothermal return water pipeline, a geothermal water supply pipeline, an elbow, and a flange.

[0015] The geothermal well is a medium-deep coaxial casing type structure, comprising an inner central pipe and an inner annular outer casing pipe.

[0016] The medium-deep coaxial casing heat exchange well is used for heat energy exchange between the geothermal well and the water pipeline in the well.

[0017] The energy unit module of the utility model provides a certain flow and constant temperature cold and hot source, so as to simulate the actual operation of the user side.

[0018] The energy unit module of the utility model provides a certain flow and constant temperature cold and hot source, so as to simulate the actual operation of the user side.

[0019] The energy unit module of the utility model provides a certain flow and constant temperature cold and hot source, so as to simulate the actual operation of the user side.

[0020] The energy unit module of the utility model provides a certain flow and constant temperature cold and hot source, so as to simulate the actual operation of the user side. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The utility model discloses an embodiment test device system structure and principle schematic view.

[0022] DRAWINGS

[0023] 1, energy supply unit module, 2, quick connector, 3, control signal line, 4, energy supply hydraulic module, 5, control center, 6, energy conversion water tank, 7, heat exchange hydraulic module, 8, coaxial sleeve geothermal well, 9, water pump, 11, energy supply unit controller, 41, energy supply side heat energy meter, 42, water supply pipeline, 43, check valve, 44, filter, 45, energy supply module controller, 46, energy supply pump, 47, backwater pipe, 61, water injection valve, 62, slow flow partition, 63, water supply tank, 64, sewage valve, 65, intermediate partition, 66, backwater tank, 71, regulating valve, 72, temperature gauge, 73, pressure gauge, 74, flowmeter, 75, pressure sensor, 76, temperature sensor, 77, heat exchange side controller, 78, geothermal water outlet pipeline, 79, geothermal water supply pipeline, 81, inner center pipe, 82, outer sleeve pipe; DETAILED DESCRIPTION

[0024] The utility model is further described below in combination with embodiments, and the specific structure and system layout mode of the utility model are shown in the drawings. Those skilled in the art can make technical extensions on the basis of the following technologies, achieve technical perfection or expansion of the technical scheme, and the protection scope of the patent application is limited by the claims only.

[0025] In order to solve the problems in the prior art, the utility model discloses a pry-mounted middle-deep geothermal well heat exchange capacity testing device, which simulates and sets a constant-temperature water storage and supply tank, enters the middle-deep coaxial sleeve type geothermal well at a set water temperature and water flow, measures the water temperature and water flow of the actual water outlet of the geothermal well, compares and analyzes the water flow, temperature and heat of the inlet and outlet water, calculates the energy difference of the inlet and outlet water of the geothermal well per unit time, and determines the heat exchange capacity and heat exchange efficiency of the geothermal well.

[0026] To achieve the above technical purposes, the utility model adopts the following scheme:

[0027] A pry-mounted middle-deep geothermal well heat exchange capacity testing device sets a modular and overall pry-mounted middle-deep geothermal well detection device and provides a simulated user side water source with a certain set temperature and flow for the geothermal well, injects water with a certain set temperature and flow into the outer wellbore of the coaxial sleeve type middle-deep geothermal well, the water exchanges heat with the surrounding crust soil, sand and water of the geothermal well and the inner wellbore of the geothermal well, the water flows out of the geothermal well, the detection device system workstation compares and analyzes the water flow, temperature and heat of the inlet and outlet water of the geothermal well, logically calculates, and calculates the energy difference of the inlet and outlet water of the geothermal well per unit time, so as to determine the heat exchange capacity and heat exchange efficiency of the geothermal well. Embodiment 1

[0028] A kind of pry-mounted middle-deep geothermal well heat exchange capacity testing device, this detection device is cold, hot source self-supply type integral assembly overall pry-mounted structure, its external dimensions are according to the transportable external dimensions of container and motor transport vehicle to adopt modular size design, facilitate transportation and on-site hoisting, disassembly, assembly, in the embodiment, to facilitate transportation, set the testing device external width size ≤2400mm, height size less than 2500mm, to facilitate transportation.

[0029] Its internal structure includes: energy supply unit module 1, quick connector 2, energy supply hydraulic module 4, control center 5, energy conversion water tank 6, heat exchange hydraulic module 7, geothermal well 8, water pump 9 and other valve pipeline connection components; as shown in Figure 1 The energy supply unit module 1 is connected with the energy supply hydraulic module 4 through the quick connector 2; the energy supply hydraulic module 4 is connected with the heat exchange water tank 6 through the quick connector 2; the heat exchange water tank 6 is connected with the heat exchange hydraulic module 7 through the quick connector 2; the heat exchange hydraulic module 7 is connected with the geothermal well 8 through the quick connector 2; the water pump 9 is suspended in the inner center pipe 81 of the geothermal well 8; the water pump 9 is selected as a multi-stage submersible pump and adopts frequency conversion control, and is arranged at the bottom of the inner center pipe 81 for pumping water from the inside to the outside of the geothermal well 8. The flow of the submersible pump 9 and the energy supply pump 46 is preferably 10-40 m 3 / h; the head is preferably 15-130 m.

[0030] The control center 5 is a remote control system of upper computer of testing device workstation or computer, in the embodiment, the control center adopts testing device workstation, and is connected with the energy supply unit controller 11, the energy supply module controller 45 and the heat exchange side controller 77 through the control signal line 3 to form a middle-deep geothermal well testing device control system for analyzing, measuring, monitoring and calculating the information data transmitted or collected by each module controller.

[0031] The energy supply unit module 1 is an air source cold and hot water heat pump unit, which can realize refrigeration and heating function conversion under full climate environmental conditions to provide cold and hot water source for the geothermal well.

[0032] The energy supply hydraulic module 4 is a pry-mounted integral assembly structure, which includes: the water supply pipeline 42 and the return water pipeline 47 arranged inside to communicate between the energy supply unit module 1 and the energy conversion water tank 6; the energy supply side heat energy meter 41, the regulating valve 71, the thermometer 72, the pressure gauge 73, the electromagnetic flowmeter 74, the pressure sensor 75, the temperature sensor 76 and other connecting components such as elbow and flange are arranged on the water supply pipeline 42; the check valve 43, the filter 44, the energy supply module controller 45 and the energy supply pump 46 are arranged on the return water pipeline 47. The energy supply pump 46 is a shielded pipeline pump, which adopts frequency conversion control.

[0033] The heat exchange water tank 6 is a heat preservation water tank, and the preferred size of the heat exchange water tank 6 is that the height is below 1500 mm, and the volume is preferably 4-10 m 3 The middle partition plate 65 arranged horizontally in the water tank divides the water tank into the water supply tank 63 and the return water tank 66. The middle of the water supply tank 63 and the return water tank 66 is provided with a vertical flow buffering partition plate 62, which is used to buffer the water flow pressure difference between the water supply pipeline 42 in the water supply tank 63 and the geothermal water supply pipeline 79. The vertical flow buffering partition plate 62 is also used to buffer the water flow pressure difference between the return water pipeline 47 in the return water tank 66 and the geothermal water outlet pipeline 78. Further, the upper end of the middle partition plate 65 in the heat exchange water tank 6 is lower than the height of the heat exchange water tank 6, and the size difference is preferably 100-150 mm. The left side, the right side and the bottom side of the middle partition plate 65 are respectively welded firmly with the left side plate, the right side plate and the bottom plate of the heat exchange water tank 6. This structure is convenient for adjusting the water level height between the water supply tank 63 and the return water tank 66. Further, the upper end of the vertical flow buffering partition plate 62 arranged in the heat exchange water tank 6 is lower than the height of the upper end surface of the middle partition plate 65, and the height difference is preferably 100-150 mm. The gap between the lower end of the vertical flow buffering partition plate 62 and the water tank bottom plate is preferably 100-150 mm. The left and right ends of the vertical flow buffering partition plate 62 are welded firmly with the front side plate of the water tank 6 and the middle partition plate 65.

[0034] The heat exchange hydraulic module 7 adopts a pry-mounted integral assembly structure, which includes two pipelines, i.e. the geothermal water outlet pipeline 78 and the geothermal water supply pipeline 79. The connection between the heat exchange hydraulic module 7 and the geothermal well 8 and the heat exchange water tank 6 is realized through the geothermal water outlet pipeline 78 and the geothermal water supply pipeline 79. The geothermal water outlet pipeline 78 is provided with the regulating valve 71, the thermometer 72, the pressure gauge 73, the electromagnetic flowmeter 74, the pressure sensor 75, the temperature sensor 76 and the heat exchange side controller 77. The geothermal water supply pipeline 79 is provided with the heat exchange side heat energy meter 41, the check valve 43, the filter 44, the elbow, the flange and other connecting components.

[0035] The geothermal well 8 is a middle-deep coaxial casing heat exchange well, which includes the inner central pipe 81 and the outer casing 82 with an annular structure. The inner central pipe 81 and the outer casing 82 are communicated at the well bottom. The well mouth of the central pipe 81 is communicated with the geothermal water outlet pipeline 78. The well mouth of the outer casing 82 in the well is connected with the annular pipe water pipeline and communicated with the geothermal water supply pipeline 79. The above-mentioned middle-deep coaxial casing heat exchange well is used for heat energy exchange between the well outer geothermal and the water pipeline in the outer casing 82.

[0036] Preferably, the refrigerating capacity of the energy supply unit module 1 is 16-18KW, 32-35KW, 65-70KW, 130-140KW, and the heating capacity is 18-20KW, 35-40KW, 70-80KW, 150-160KW. The compressor in the energy supply unit module 1 is a direct-current variable-frequency scroll compressor, the condenser is a jacketed or plate heat exchanger, the evaporator is a finned heat exchanger, and the condenser fan is a variable-frequency fan.

[0037] Preferably, the energy supply unit controller 11, the energy supply module controller 45 and the heat exchange side controller 77 are multifunctional controllers with PLC programming, RS485 communication protocol interface function and liquid crystal display control panel.

[0038] The energy supply side heat energy meter 41, the thermometer 72, the pressure gauge 73, the electromagnetic flowmeter 74, the pressure sensor 75 and the temperature sensor 76 have data information remote transmission function; the energy supply module controller 45 receives, processes, analyzes and monitors the information data transmitted by the energy supply side heat energy meter 41, the energy supply pump 46, the thermometer 72, the pressure gauge 73, the electromagnetic flowmeter 74, the pressure sensor 75 and the temperature sensor 76, and processes, logically calculates, controls and remotely transmits the information data to the control center 5.

[0039] The heat exchange side controller 77 receives, processes, analyzes and monitors the information data transmitted by the water pumping pump 9, the heat exchange side heat energy meter 41, the energy supply pump 46, the thermometer 72, the pressure gauge 73, the electromagnetic flowmeter 74, the pressure sensor 75 and the temperature sensor 76, and processes, logically calculates, controls and remotely transmits the information data to the control center 5.

[0040] The energy supply module controller 45 receives, processes, analyzes and monitors the information data transmitted by the water pumping pump 9, the heat exchange side heat energy meter 41, the energy supply pump 46, the thermometer 72, the pressure gauge 73, the electromagnetic flowmeter 74, the pressure sensor 75 and the temperature sensor 76, and processes, logically calculates and remotely transmits the information data to the control center 5. In order to meet the basic capacity of the equipment, the flow of the submersible pump 9 and the energy supply pump 46 is preferably 10-40m 3 / h, and the head is preferably 15-130m. Embodiment 2:

[0041] The utility model discloses still disclose a kind of middle-deep geothermal well heat exchange capacity test method, the test method uses above-mentioned pry-mounted middle-deep geothermal well heat exchange capacity test device, and the method calculation theoretical principle is:

[0042] Heat exchange capacity of middle-deep geothermal well: Q 计算 = p * v * C, * ΔT

[0043] Q = m * C, * ΔT 计算 A geothermal well calculation heat exchange, kW;

[0044] p - the density of water, kg / m;

[0045] V - the volume flow rate of water, m' / s;

[0046] C - the specific heat of water at constant pressure, kJ / (kgx℃);

[0047] ΔT - the temperature difference between the inlet and outlet of the test device, ℃;

[0048] This case takes the heat exchange capacity test project of the middle-deep geothermal well in Baishishan Town, Jiaohe City, Jilin Province as an example to verify the feasibility of this method;

[0049] Project overview: The well completion time of the project is January 16, 2025, and the well depth is 1000 meters; The heat exchange well structure is coaxial casing structure; The outer well wall diameter of the heat exchange well is DN200, the bottom is closed, the upper end is reserved for the inlet and outlet of the closed cylindrical cylinder structure, and the upper end of the inlet is connected with the geothermal outlet pipeline 78 of the test device; The inner well is a DN40 heat insulation pipeline and is arranged at the center of the outer well axis and the bottom of the submersible pump; The bottom of the inner well is connected with the submersible pump arranged at the bottom of the outer well, and the upper end is connected with the geothermal water supply pipeline 79 of the test device through the water outlet;

[0050] The test time is from March 21, 2025 to March 26, 2025

[0051] Date Time Outdoor temperature °C Water flow rate m 3 / h]] Inflow rate m 3 / h]] Water outlet temperature °C Water inlet temperature °C Heat meter display MJ Heat calculation value MJ Theoretical / actual error % 3.23 10：27：00 13.17 20.28 20.42 8.93 6.46 216 209.4 3.1 3.23 22：50：00 2.97 19.66 19.86 8.75 5.67 260 253.1 2.6 3.24 03：08：00 3.79 19.71 20.08 8.43 5.38 260 251.3 3.35 3.24 14：10：00 9.97 19.9 20.36 9.15 6.37 236 231.2 2 3.26 9：30：00 0.61 15.04 15.21 6.32 2.93 220 213.1 3 3.26 16：00：50 1.89 15.14 15.52 12.37 11.61 50 48.1 3.8

[0052] According to the above data, the error between the actual heat exchange capacity of the case and the theoretical calculation is between 2-4%, and this scheme is feasible;

[0053] Implementation:3:

[0054] The energy supply hydraulic module 1 and the heat exchange hydraulic module 4 in the pry type middle-deep geothermal well heat exchange capacity test device are provided with intelligent electromagnetic or ultrasonic heat meters 41, flow meters 74 and pressure sensors 75, which can also be used for water leakage detection of the coaxial casing geothermal well 8.

[0055] The detection method is: set the same flow rate for the energy supply pump 46 and the water lifting pump 9, compare the flow rates of the energy supply hydraulic module flow meter and the heat exchange hydraulic module flow meter, and determine whether the geothermal well leaks:

[0056] F 地热 <F供能 , F 地热 When the set flow rate and the water level in the backwater tank 66 decreases prove that the geothermal well leaks;

[0057] F 地热 When the set flow rate and the water level in the backwater tank 66 decreases prove that the geothermal well leaks; 供能 , F 地热 When the set flow rate and the water level in the backwater tank 66 decreases prove that the geothermal well leaks;

[0058] In the formula: 地热 A geothermal heat exchange side flow meter;

[0059] F 供能 A power supply side heat exchange side flow meter;

[0060] The case takes the heat exchange capacity test project of the middle-deep geothermal well in Baishishan Town, Jiaohe City, Jilin Province as an example to verify the feasibility of the method;

[0061] The project profile is the same as above;

[0062] The test time is from March 21, 2025 to March 26, 2025

[0063] Date Time Outdoor temperature °C F 地热 Pump flow rate m 3 / h]] F 供能 Pump flow rate m 3 / h]]> Pump 9, 46 sets flow rate m 3 / h]] Water tank 63 water level mm Water tank 66 water level mm Water pipe 9 pressure MPa Yes / No water leakage 3.23 10：27：00 13.17 20.28 20.28 20 1000 1000 0.05 No 3.23 22：50：00 2.97 19.66 19.70 20 1000 990 0.05 Yes 3.24 03：08：00 3.79 19.71 19.76 20 1000 992 0.05 Yes 3.24 14：10：00 9.97 19.9 20.01 20 1000 989 0.05 Yes 3.26 9：30：00 0.61 15.04 15.10 15 1000 1005 0.05 Yes 3.26 16：00：50 1.89 15.14 15.15 15 1000 1006 0.05 Yes

[0064] The energy unit module provides a certain flow rate and constant temperature cold and hot source to simulate the actual operation of the user side, accurately displays or calculates the heat exchange capacity of the geothermal well, tests and calculates the heat absorption of the underground rock and soil and the heat exchange efficiency, and provides accurate and effective information and data for subsequent project function design;

[0065] The utility model discloses a flow meter is arranged on the geothermal side and the power supply side, liquid level meters are arranged in the water supply tank and the backwater tank of the energy conversion tank, compares and analyzes the flow meter of the geothermal side and the power supply side with the set pump flow rate, and with the help of the liquid level pressure difference of the water supply tank and the backwater tank, can be used for the leakage quality detection of the coaxial casing geothermal well, and the method is simple and convenient to operate.

Claims

1. A skid-mounted heat exchange capacity testing device for a medium-deep geothermal well, characterized in that: It comprises: The energy supply module is connected with the energy supply hydraulic module; the energy supply hydraulic module is connected with the heat exchange water tank; the heat exchange water tank is connected with the heat exchange hydraulic module; the heat exchange hydraulic module is connected with the geothermal well; the control center is connected with the energy supply module controller and the heat exchange side controller through the control signal line to form a control system of the middle-deep geothermal well testing device. The energy supply hydraulic module is internally provided with a water supply pipeline and a backwater pipeline to communicate between the energy supply module and the heat exchange water tank; the water supply pipeline is provided with an energy supply side heat energy meter, an adjusting valve, a thermometer, a pressure gauge, an electromagnetic flowmeter, a pressure sensor and a temperature sensor; the backwater pipeline is provided with a check valve, a filter, an energy supply module controller and an energy supply pump. The heat exchange hydraulic module is internally provided with a geothermal water outlet pipeline and a geothermal water supply pipeline to realize the connection between the heat exchange hydraulic module and the geothermal well and the heat exchange water tank; the geothermal water outlet pipeline is provided with an adjusting valve, a thermometer, a pressure gauge, an electromagnetic flowmeter, a pressure sensor, a temperature sensor and a heat exchange side controller; the geothermal water supply pipeline is provided with a heat exchange side heat energy meter, a check valve and a filter.

2. The device according to claim 1, wherein the device is a skid-mounted device. The heat exchange water tank is a heat preservation water tank, and an intermediate partition plate horizontally arranged in the middle of the water tank divides the water tank into a water supply tank and a backwater tank; the water supply tank and the backwater tank are both provided with vertical slow-flow partition plates to buffer the water flow pressure difference in the water supply tank and the backwater tank.

3. The device according to claim 2, characterized in that: The geothermal well is a middle-deep coaxial casing heat exchange well, which comprises an inner central pipe and an outer casing pipe with an annular structure; the inner central pipe is communicated with the outer casing pipe at the bottom of the well; the wellhead of the inner central pipe is communicated with the geothermal water outlet pipeline; the wellhead of the outer casing pipe is communicated with the geothermal water supply pipeline.

4. The device according to claim 1, wherein the device is characterized in that: The refrigerating capacity of the energy supply module is 16-18KW, 32-35KW, 65-70KW or 130-140KW unit modular module combination; the heating capacity is 18-20KW, 35-40KW, 70-80KW or 150-160KW unit modular module combination.

5. The device according to claim 1, wherein the device is a skid-mounted device. The energy supply side heat energy meter, the thermometer, the pressure gauge, the electromagnetic flowmeter, the pressure sensor and the temperature sensor have data information remote transmission function.

6. The skid-mounted heat transfer capacity testing device for medium-deep geothermal wells according to claim 1, characterized in that: The energy supply module controller receives, processes, analyzes and monitors the information data transmitted by the energy supply side heat energy meter, the energy supply pump, the thermometer, the pressure gauge, the electromagnetic flowmeter, the pressure sensor and the temperature sensor, and processes, logically calculates, controls and remotely transmits the information data to the control center.

7. The device according to claim 1, wherein the device is a skid-mounted device. The heat exchange side controller receives, processes, analyzes and monitors the information data transmitted by the water pump, the heat exchange side heat energy meter, the energy supply pump, the thermometer, the pressure gauge, the electromagnetic flowmeter, the pressure sensor and the temperature sensor, and processes, logically calculates, controls and remotely transmits the information data to the control center.

8. The device according to claim 1, characterized in that it is a skid-mounted device. The energy supply module is an air source cold and hot water heat pump module.

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