71 results about "Geothermal energy" patented technology

The application provides a water temperature monitoring and extraction simulation device based on coal mine geothermal energy, and belongs to the technical field of geothermal energy. The device comprises a tank body, an inner cavity is arranged in the tank body, three isolation plates are fixedly connected in the inner cavity, the inner cavity is divided into three cavities by the isolation plates, a placing box with an open top is arranged in each cavity, prefabricated samples are placed in the placing boxes, a plurality of temperature sensors are prearranged in the prefabricated samples, and a vibration assembly is arranged outside the tank body. The isolation plates, the multiple pressure applying assemblies and the elastic rods with different heights are cooperated, so that the multiple stress environments of the coal mines with different depths can be simulated at the same time, the actual stratum differences are better matched, the water penetration is actively controlled by the lifting assembly, the underground water dynamic infiltration process is accurately restored, the static water supplement is avoided to be disconnected with the actual situation, the sample crack water is uniformly distributed by the vibration assembly through vibration, the local water accumulation or vacancy is prevented, and the accuracy and reliability of the water temperature monitoring data are improved.

The application provides a heating method, a heating control device and a heating system which are preferential for middle-deep geothermal energy, and the heating method comprises the following steps: determining real-time heating load demand of a heat user; triggering a middle-deep downhole heat exchange system to provide heating for the heat user; triggering a PVT and the middle-deep downhole heat exchange system to provide heating for the heat user when the PVT meets a heating condition; starting a rock-soil energy storage and recycling system to cooperate with the middle-deep downhole heat exchange system and the PVT to provide heating for the heat user when the heating load demand of the heat user cannot be met by the heat energy provided by the middle-deep downhole heat exchange system and the PVT; and starting an air source heat pump system to cooperate with other heating heat source devices to realize matching between the heating heat energy and the heating load demand of the heat user when the heating load demand of the heat user cannot be met by the cooperation of the middle-deep downhole heat exchange system, the PVT and the rock-soil energy storage and recycling system. The energy utilization efficiency is improved by the scheme provided by the application, and efficient, stable and economic operation of the heating system is realized.

The invention belongs to the technical field of shallow geothermal energy heat exchange model verification, and provides a shallow geothermal energy heat exchange model construction verification and evaluation method and related equipment, and the method comprises the steps: obtaining soil temperature and soil moisture content data at corresponding time; wherein the soil temperature and the soil moisture content are arranged according to a time sequence; the soil temperature and the soil moisture content are pretreated, and the pretreated soil temperature and the pretreated soil moisture content are obtained; inputting the pretreated soil temperature and the pretreated soil moisture content into a pre-trained random forest regression model to obtain a dynamic soil heat conductivity coefficient and a dynamic soil specific heat capacity at corresponding time; calculating the corrected soil heat exchange amount based on the dynamic soil heat conductivity coefficient; the dynamic soil heat conductivity coefficient and specific heat capacity can be obtained by obtaining the soil temperature and water content data at the corresponding time, and the change of the soil thermophysical property parameters along with time can be captured in real time, so that the calculation of the corrected soil heat exchange amount is more suitable for the actual heat exchange process.

The application discloses a geothermal well and recharging well fracturing construction process, and determines the well position and well depth of the geothermal well according to engineering geology and hydrogeology conditions; drilling is conducted at the well position of the geothermal well, the construction of the geothermal well is conducted, and well cementation and well washing of the geothermal well are conducted; an initial value of the radius of the heat extraction influence range of the geothermal well during heat extraction is obtained; whether the initial value is smaller than a first threshold value is judged, if yes, fracturing holes are processed on the well wall of the heat extraction section in the geothermal well, and the heat extraction section is subjected to staged fracturing to form fracturing gaps; the well position and well depth of the recharging well are determined; drilling is conducted at the well position of the recharging well, the construction of the recharging well is conducted, and well cementation and well washing of the recharging well are conducted; fracturing holes are processed on the well wall of the recharging section in the recharging well, and the recharging section is subjected to staged fracturing to form fracturing gaps. The geothermal well and recharging well fracturing construction process of the embodiment of the application can improve geothermal energy flow and reduce disturbance to the stratum.

The present application relates to the technical field of oil and gas exploitation, and particularly relates to a heat pump circulation viscosity reduction device based on center pipe closed heat exchange and a use method. The technical scheme is that a center pipe heat exchange unit is located in a production oil pipe, and a ground circulation unit is located at one side of a wellhead device; a hollow sucker rod column of the center pipe heat exchange unit is provided with an inner center pipe, a bottom of the inner center pipe is provided with a center pipe bottom head, and a pipe wall of an upper side is provided with more than one center pipe bottom side opening; the beneficial effects are that heat exchange working medium heated by a heat pump is lowered along the inner center pipe to the hollow sucker rod column in a wellbore, and then is raised to a near ground position along the center pipe bottom side opening between the inner center pipe and the hollow sucker rod column, closed heat exchange prevents blockage and circulation, energy consumption is greatly reduced by using the heat pump technology and the geothermal energy, safety is improved, the function of preventing blockage and increasing production is effectively realized, and the number of workover operations is reduced.

This invention relates to the field of oil and gas extraction technology, and particularly to a heat pump circulation viscosity reduction device and its usage method based on a central tube closed-loop heat exchange. The technical solution is as follows: the central tube heat exchange unit is located inside the production tubing, and the surface circulation unit is located on one side of the wellhead device; an internal central tube is installed inside the hollow sucker rod string of the central tube heat exchange unit, with a central tube bottom end cap at the bottom and one or more central tube bottom side openings on the upper tube wall; its beneficial effects are: the heat exchange working fluid heated by the heat pump is pumped down the internal central tube to the hollow sucker rod string inside the wellbore by the surface circulation pump, and then enters the annulus between the internal central tube and the hollow sucker rod string through the central tube bottom side opening, rising to near the surface. This closed-loop heat exchange and anti-clogging circulation, through the use of heat pump technology and geothermal energy, significantly reduces energy consumption, improves safety, effectively achieves the function of anti-clogging and increased production, and also reduces the number of well workover operations.

The invention discloses a method for predicting geothermal energy exploitation performance in the geological hydrogen storage process of a salt water layer, belongs to the field of geothermal energy development and utilization, and aims to predict formation temperature evolution characteristics and production well heat production characteristics in the geological hydrogen storage process. The method is characterized in that a flow-heat transfer coupling model for describing the geological hydrogen storage process is established based on an energy conservation equation, a momentum conservation equation and a mass conservation equation; the method comprises the following steps: establishing a reservoir geologic model according to geological exploration data of the underground salt water layer, dividing grids for the geologic model, obtaining a plurality of grid units reflecting different spatial distribution positions of the underground salt water layer, and setting initial conditions and boundary conditions of the reservoir geologic model; and solving the stratum temperature in each grid unit in the reservoir geologic model and the heat flux density of the production well by adopting the constructed flow heat transfer coupling model, and realizing effective prediction of the stratum mining performance in the geological hydrogen storage process.

The invention discloses a terrestrial heat collection system, a terrestrial heat energy supply system and a control method of the energy supply system, and relates to the technical field of terrestrial heat collection, the terrestrial heat collection system comprises a heat pipe installed in a terrestrial heat well, and the heat pipe comprises an inner pipe and N liquid inlet pipes arranged on the periphery of the inner pipe, the opening direction of the first ends of the N liquid inlet pipes faces a well mouth of the geothermal well, the first ends of the N liquid inlet pipes are used for liquid feeding, the second ends of the N liquid inlet pipes communicate with N liquid outlets formed in the side wall of the inner pipe correspondingly, and the depths of at least two of the N liquid outlets are not equal. N is a positive integer greater than or equal to 2. The amount of liquid injected into each liquid inlet pipe is only one part of the amount of liquid injected into a single inlet, and fluid in the N liquid inlet pipes can be injected into the inner pipe at least at two different depths, so that the phenomenon of unstable flowing of a countercurrent structure caused by large liquid amount and large steam amount at the shallow depth can be effectively reduced.

This invention belongs to the field of geophysical exploration technology of geothermal resources and seismic activity. It provides a method, system, electronic device, and storage medium for analyzing the coexistence mechanism of geothermal and seismic activity. The method includes: three-dimensional joint inversion, computational domain gridding, attribute addition, boundary condition addition, reference temperature addition, simulation calculation, and correlation analysis. By performing three-dimensional joint inversion on electromagnetic and gravity data, this invention makes the model more consistent with the actual underground geological structure characteristics, freeing it from the idealized constraints of theoretical models and improving the accuracy of simulation results. Through attribute addition, boundary condition addition, reference temperature addition, simulation calculation, and correlation analysis, a complete theoretical system for the deep control and coexistence of seismic activity and geothermal resources is constructed, realizing the extraction of the intrinsic correlation between geothermal activity and earthquake occurrence.

The utility model provides a heat damage heat utilization mine cooling system combined cross-seasonal energy storage system. The heat damage heat utilization mine cooling system combined cross-seasonal energy storage system comprises a gas treatment module, a desorption regeneration module and a geothermal energy storage and supply module. According to the system disclosed by the invention, the air is treated through the combination of the direct evaporation type heat pump unit and the buried pipe, the rotating wheel dehumidification and sensible heat exchanger is arranged in the air treatment process, and sensible heat exchange is carried out between hot air exhausted by the mine and the air through the zero-energy-consumption solar heat collector and is used for regeneration of the rotating wheel dehumidifier; the energy consumption of a mine cooling system is saved, the underground dehumidification problem is solved, and the comfort of a mine working face is improved.

The application relates to the technical field of geothermal energy development and utilization, and discloses a middle-deep geothermal well inner heat exchange simulation device and an experimental method.The heat exchange simulation device comprises a simulated formation heat source module, a downhole coaxial heat exchange module, a ground liquid circulation module and a parameter monitoring module.The simulated formation heat source module uses a constant temperature heater to heat a space containing multiple simulated formation layers, thereby establishing a vertical temperature gradient.The downhole coaxial heat exchange module is arranged in the multiple simulated formation layers and comprises a coaxial flow channel formed by a geothermal well casing and a geothermal well inner tube.The ground liquid circulation module is connected with the downhole coaxial heat exchange module to form a closed loop.The parameter monitoring module obtains formation temperature and fluid operation data.The application provides a heat exchange simulation experimental method using the aforementioned device, and through the stages of environment initialization, circulation establishment, heat exchange monitoring and parameter evaluation, the heat exchange environment of a deep geothermal well is restored, and the influence of complex geology and group well interference on heat exchange capacity is objectively analyzed.

The application belongs to the technical field of tunnel ice melting, and particularly relates to a laying method of a tunnel portal pavement geothermal ice melting pipeline, which comprises a heat extraction unit, a heat supply unit and a control device; the heat extraction unit comprises a heat extraction pipe, a first pressure monitor and a first circulating water pump; the heat supply unit comprises a heat exchange unit, a heat collection water tank, a second circulating water pump, a second pressure monitor, a temperature monitor, a total water inlet pipe, a total water outlet pipe and a road heat exchange pipe; the road heat exchange pipe is installed in a cement concrete surface layer of a cement concrete asphalt road; the cement concrete asphalt road comprises, from bottom to top, a road soil base layer, a road cushion layer, a cement concrete base layer, a heat insulation layer, a cement concrete surface layer, an asphalt lower surface layer and an asphalt upper surface layer. The application realizes the purpose of ice and snow melting by extracting geothermal energy and transmitting it to the ice and snow layer on the road surface; and the whole tunnel portal pavement geothermal ice melting pipeline is controlled according to pressure change and temperature change.

The present invention relates to the technical field of flexibility retrofitting for combined heat and power (CHP) units, and specifically relates to a multi-stage peak shaving system coupling deep geothermal energy storage with CHP. On the basis of long-term geothermal energy storage by aquifer thermal energy storage (ATES) units and hot well / cold well (HW / CW) pairs, combined with electric heat pump (EHP) units, the waste heat recovery of CHP units is realized, thereby improving the wind-solar power accommodation capacity of a power grid and the CHP peak shaving response speed; and integrating the EHP units with two-stage plate heat exchangers (HX1 / HX2) for coordinated heat storage and supply operation achieves three-stage deep peak shaving for CHP, thereby improving the CHP power generation peak shaving depth and expanding the CHP heat supply range. Overall, the wind-solar curtailment rate and the system operation cost are reduced, thereby achieving the applicability to large-scale high-penetration wind-solar power accommodation and deep peak shaving operation scenarios of CHP units.

The present disclosure provides a geothermal tail water filtering tank, and relates to the technical field of geothermal energy, which comprises a tank body, one or more liquid inlets and one or more liquid outlets are arranged on the tank wall of the tank body; a filter core, the filter core is arranged in the tank body and can filter the sand-containing geothermal tail water entering the tank body through the liquid inlet; and a partition plate, the partition plate is arranged in the tank body and used for fixing the filter core and located between the liquid inlet and the liquid outlet. The present disclosure can solve the technical problems of low filtering efficiency, long precipitation time, difficult cleaning of sand particles after precipitation and easy clogging of the existing geothermal tail water sedimentation tank.

This invention discloses a supercritical gas injection simulation method for deep-earth energy storage projects. This method constructs a computational framework for supercritical gas-salt two-phase flow based on the lattice Boltzmann method, utilizes the Shan-Chen two-component model to characterize the interaction between supercritical gas and water, and introduces a continuous surface force model equation to controllably couple interfacial tension, thereby achieving numerical simulation of supercritical gas injection under high density ratio and high surface tension conditions. Through an improved force term discretization scheme and independent adjustment of the surface tension term, high-precision recovery of force balance at the interface is achieved, significantly improving simulation stability and physical consistency. This invention fills the gap in the lattice Boltzmann method for simulating the displacement, migration, and storage behavior of various supercritical gases in porous aquifers or fractured grids, and can provide technical support for the design, operation, and safety assessment of deep-earth energy storage projects.

This invention discloses a pressure-push type magnetic co-drive engine, including a support mechanism system, a rotating magnet disk, a drive magnet ring, several rotating magnets, several drive magnets, several lateral drive magnets, a magnetic pressure-push system, a magnetic clutch, a starter and gearbox, and an intelligent control system. This invention creates a permanent magnet pressure-push co-drive technology. Under the synergistic effect of the magnetic pressure-push system, all drive magnets accurately and periodically drive the rotating magnets to rotate. Simultaneously, the lateral drive magnets also drive the rotating magnets to rotate, thereby rotating the rotating magnet disk and the engine shaft, outputting highly stable, clean, and high-quality power. The entire power generation and usage process does not require the combustion of any fossil fuels such as coal, oil, or natural gas, nor does it produce any waste emissions. It also does not require the use of unstable natural forces such as wind power, hydropower, ocean waves, tides, geothermal energy, or solar energy.

The invention discloses a shallow geothermal and thermal power plant coupled energy heat supply method and device, and the method comprises the steps: obtaining the wellhead temperature of a geothermal well in shallow geothermal; determining a first target parameter of the geothermal well and a second target parameter of the target thermal power generating unit based on the wellhead temperature; and parameters of the geothermal well and the thermal power generating unit are adjusted based on the first target parameter and the second target parameter, so that coupling heat supply is achieved. Therefore, on the basis of the first target parameter and the second target parameter, the parameters of the geothermal well and the thermal power generating unit are adjusted so as to couple heat supply of the heater of the heat supply network, steam extraction heat supply of the steam turbine and heat supply of the deaerator, and therefore maximum energy utilization is achieved, the energy utilization efficiency is improved, and energy conservation and emission reduction are achieved.

This invention provides a device and method for extracting seabed natural gas hydrates, belonging to the field of natural gas extraction technology. It includes a base plate, with a wellbore fixedly connected to the inner side of the base plate. A collection component for seabed natural gas hydrate extraction is fixedly connected to the bottom of the wellbore, and a heat exchange cylinder is fixedly connected to the bottom of the collection component. This invention, by setting up a heat exchange component and extending the heat exchange cylinder to the seabed geothermal layer, extracts seawater and achieves sufficient heat exchange between seawater and seabed geothermal energy through multiple layers of staggered heat exchange plates and flow pipes. This eliminates the need for additional extraction of formation hot water and additional extraction steps, solving the drawbacks of traditional devices that require additional extraction of formation hot water and involve cumbersome procedures. Simultaneously, the seabed geothermal energy is a continuous and stable heat source, ensuring a continuous supply of preheated seawater, avoiding the problems of low efficiency and high heat loss in thermal excitation methods, ensuring the continuity of hydrate decomposition, and improving extraction stability.

The control device is provided with: an operation control unit capable of switching between a first cold storage mode in which the heat stored in the warm water well is supplied to the cooling tower without passing through the heat source machine, a second cold storage mode in which the heat stored in the warm water well is supplied to the cooling tower without passing through the heat source machine, a first cold discharge mode in which the heat stored in the warm water well is discharged, and a second cold discharge mode in which the heat stored in the warm water well is discharged; and a first cold / heat storage mode in which the cold / heat obtained from the cooling tower is stored in the cold water well without passing through the heat source machine, and a second cold / heat storage mode in which the warm / heat stored in the warm water well is supplied to the cooling tower via the heat source machine and the cold / heat obtained from the cooling tower is stored in the cold water well via the heat source machine, and a first cold / heat release mode in which the warm / heat stored in the warm water well is released. A first cold / heat release mode in which the cold / heat accumulated in the cold water well is supplied to the machine without passing through the heat source machine, and a second cold / heat release mode in which the cold / heat accumulated in the cold water well is supplied to the machine through the heat source machine; a calculation unit that calculates a cumulative cold storage amount; a prediction unit that predicts a required cold storage amount; and a mode determination unit that determines whether to control in the first cold storage mode or in the second cold storage mode on the basis of the accumulated cold storage amount and the required cold storage amount.

The invention discloses a deep stratum heat storage simulation experiment device and method, and relates to the technical field of geothermal energy storage simulation.The deep stratum heat storage simulation experiment device comprises a reaction device, a gas preparation device, an injection device and a detection device.The reaction device comprises a reaction kettle, a heating device and a clamping device located in the reaction kettle; the heating device is used for heating the reaction kettle; the reaction kettle is provided with an openable inlet and an openable outlet; the gas preparation device is connected with the reaction kettle; the injection device is connected with the reaction kettle and comprises a piston container and a first pump body, and the piston container is used for injecting liquid into the reaction kettle; the detection device is used for detecting the mass of gas and liquid flowing out of the reaction kettle. According to the technical scheme provided by the invention, the problem that although the influence of key parameter change on the deep stratum heat recovery rate can be quantitatively researched by utilizing a numerical simulation technology, parameter setting is greatly influenced by human factors when a model is established under ideal conditions can still be solved.

The invention discloses a heat pump system for preventing and controlling frost heaving diseases of a roadbed in a cold region and a design method of the heat pump system, and belongs to the technical field of maintenance of traffic infrastructures in the cold region. The wind energy capturing unit captures wind energy, converts the wind energy into mechanical energy, stores the mechanical energy in the flywheel energy storage unit and then drives the heat energy conversion unit, and the heat energy conversion unit collects low-grade renewable heat energy, converts the low-grade renewable heat energy into high-grade heat energy and conveys heat to the frost heaving disease part of the roadbed; a heat pump system is designed, the manufacturing cost is reduced, and the conversion efficiency is improved; shallow ground temperature energy in a foundation is used as a main heat source, wind energy is used for providing driving force, and the resource advantages of high wind speed and stable ground temperature energy reserve in winter are fully utilized; the flywheel energy storage unit is used for stabilizing and filtering the volatility of wind energy, and mechanical energy overflowing when the wind speed is high is stored for being output when the wind speed is low, so that the effect of peak load shifting is achieved.

The geothermal energy storage system comprises a ground heat collection unit, a heat injection energy storage unit and a co-production unit, and the ground heat collection unit collects solar energy and wind-solar excess electric energy and converts the solar energy and the wind-solar excess electric energy into high-temperature heat energy; the heat injection and energy storage unit comprises a heat injection device, an injection well, an extraction well, an artificial heat storage space, an upper cover layer and a lower cover layer, the part, located between the injection well and the extraction well, in the non-coal mining layer is transformed to form the artificial heat storage space with the permeability of 10-100 mD, and the heat injection device is connected with the ground heat collection unit and the injection well. High-temperature heat energy is injected into the artificial heat storage space to be stored, and the adsorbed coal bed gas in the artificial heat storage space is desorbed into a free state; the co-production unit is connected with the extraction well, supplies heat / cold through high-temperature heat energy, and recovers free-state coal bed gas for gas supply and power generation. In this way, non-coal mining seam resources are developed, solar energy and wind and light excess energy are consumed, and efficient geothermal energy storage and stable power generation heating / cooling are achieved.

The invention discloses a source-load-storage coupled deep geothermal long-time energy storage system and a control method, and belongs to the technical field of geothermal energy storage, the system is composed of a deep heat storage unit, a combined heat and power generation unit, a heat supply plate exchanger, a heat storage plate exchanger, a power grid, a heat supply network and a valve group, and flexible linkage of all the units is achieved through the valve group. According to the control method, on the basis of the source load storage dynamic coordination and ground and underground coupling principle, the real-time electric heating load of the building serves as the requirement standard, a variable-working-condition operation strategy is formulated in the heating season and the non-heating season, and alternate operation of heat storage in the daytime and heat removal at night in the heating season is achieved; and in the non-heating season, the combined heat and power generation unit is controlled to perform pure condensation power generation and deep heat storage closed well operation. The system energy storage efficiency can be improved, the thermal plume diffusion and thermal breakthrough risks are reduced, meanwhile, the system operation cost is reduced, and the initial payback period is shortened.

The utility model relates to a deep geothermal heat energy exploration and production single well structure adopting a pipe-in-pipe structure, which solves the problems that the traditional geothermal heat energy exploration and production does not utilize much geothermal heat energy of an underground dry and hot rock stratum, and a multi-well heat production structure is generally adopted. The structure comprises a vertically downward exploring well, a casing pipe is arranged on the well wall of the exploring well, a central pipe is arranged in the center of the casing pipe, a heat preservation layer is arranged on the pipe wall of the central pipe, a cold water injection channel is formed between the inner wall of the casing pipe and the outer wall of the central pipe, a hot water ascending channel is formed in the central pipe, and the bottom end of the exploring well is drilled to a dry hot rock stratum. And cracks are formed in the hot dry rock stratum at the bottom end of the exploring well. According to the utility model, pipe-in-pipe single well heat collection is adopted, open type heat collection is adopted at the well bottom, and cracks are artificially manufactured at the dry-hot rock stratum at the bottom end of the exploring and producing well, so that the heat exchange efficiency is improved, the efficient development and utilization of deep geothermal resources are realized, and the stability and sustainability of the underground environment are kept at the same time.

The embodiment of the invention provides a shallow geothermal enhanced heat exchange system which comprises at least two annular buried pipe heat exchange wells which are arranged by taking a water replenishing well as a center according to a preset well spacing and a preset heat exchange radius; the well spacing is the distance between the first ring of buried pipe heat exchange well and the water replenishing well; the heat exchange radius is the distance between every two circles of the buried pipe heat exchange well; the water replenishing well is used for replenishing water to the stratum; and the buried pipe heat exchange well is used for exchanging heat with the stratum. According to the shallow geothermal enhanced heat exchange system, the number of buried pipe heat exchange wells is increased, the transverse heat transfer distance of accumulated temperature difference is increased, cold and hot accumulation of a buried pipe heat exchanger is relieved, and the heat exchange efficiency of buried pipes is improved; the water replenishing well is adopted to replenish water to the constant-temperature layer, the water content of the stratum is gradually increased, the heat storage and heat exchange capacity of the stratum is enhanced, and the thermal unbalance problem of cold accumulation or hot accumulation existing in shallow geothermal energy supply is effectively relieved.

The utility model relates to a novel geothermal well thermal insulation pipe, and relates to the technical field of geothermal wells, the novel geothermal well thermal insulation pipe comprises a foundation, a thermal insulation mechanism is arranged in the foundation, a limiting mechanism is arranged outside the thermal insulation mechanism, the thermal insulation mechanism comprises an outer pipe, and the outer part of the outer pipe is fixedly connected to the interior of the foundation; an aluminum foil layer is fixedly connected to the interior of the outer pipe, a penetrating hole is formed in the exterior of the aluminum foil layer, a heat insulation layer is fixedly connected to the interior of the aluminum foil layer, an inner pipe is fixedly connected to the interior of the heat insulation layer, a connecting assembly is arranged on the exterior of the inner pipe, and a sealing assembly is fixedly connected to the exterior of the connecting assembly. The vacuum heat insulation layer is driven through the penetrating hole structure between the outer pipe and the aluminum foil layer, and convection heat dissipation is blocked, so that heat loss is reduced to the maximum extent in the conveying process of geothermal energy, and the energy utilization rate and operation reliability of a geothermal utilization system are improved.

This invention relates to the field of oil extraction equipment technology and comprises a deep well insulation, corrosion resistance, wear resistance, and pressure resistance composite pipe, consisting of a steel pipe body and a polymer composite pipe arranged sequentially from the outside to the inside. The polymer composite pipe includes a polymer outer layer pipe and a polymer inner layer pipe arranged sequentially from the outside to the inside, with a composite insulation layer between the polymer inner layer pipe and the polymer outer layer pipe. This invention provides a deep well insulation, corrosion resistance, wear resistance, and pressure resistance composite pipe that, without altering existing oil lifting and geothermal extraction processes, increases the temperature of the deep wellbore, improving the lifting conditions for heavy oil and other oils. For geothermal wells, deep wellbore insulation reduces geothermal energy loss and improves geothermal utilization efficiency.

The invention relates to a geothermal system, comprising an energy production system capable of heating a heat transfer fluid; a system for converting the thermal energy of a heat transfer fluid; a geothermal energy storage system comprising at least one closed-loop circulation circuit of a heat transfer fluid, including at least one vertical geothermal probe arranged in a borehole in the ground and capable of storing or extracting thermal energy from that ground; and a system for controlling a charging and discharging cycle of the storage system, characterized in that the probe comprises a first cold portion and a second transfer portion arranged below the first cold portion, and in that the geothermal energy storage system comprises a thermal insulation element extending into the borehole only at the level of the first cold portion. Figure to be published with the abstract: Fig. 1

The utility model relates to the technical field of scale borers, and discloses a ground source heat energy efficient scale borer which comprises a scale borer body, a control box is arranged on one side of the scale borer body, first inserting rods are fixedly arranged at the four corners of one side of the control box, and two fixing plates are arranged on the outer side of the scale borer body. The control box is located between one sides of the two fixing plates, first inserting rods at the four corners of one side of the control box penetrate through the fixing plates, side plates are fixedly arranged at the two ends of each fixing plate, the side plates are located on the outer side of the control box, and two U-shaped plates are arranged between one sides of the two fixing plates and arranged on the outer side of the control box in a sleeving mode. The control box is installed between the two fixing plates, the first inserting rods on one side of the control box are inserted into the fixing plates, then the U-shaped plates are buckled on one sides of the fixing plates, the control box is sleeved with the U-shaped plates, the caps are buckled on the outer sides of the first inserting rods, the control box is further limited, and the control box is convenient to disassemble and assemble.

Methods, systems, and devices for quantifying geothermal heat flux using shallow subsurface temperature measurements are provided. A method can include deploying vertical temperature probes with fiber optic sensors, strain sensors, and advective sensors at measurement sites. Time-series temperature data is then recorded, processed to determine equilibrium temperature profiles, and corrected for climate-driven signals, strain, and advection effects. Geothermal heat flux is calculated by combining the corrected temperature gradient with subsurface thermal conductivity, and a heat flux map can be generated to identify geothermal energy resources.