838results about "Geothermal systems" patented technology

A method of constructing an injection well for a geothermal energy system comprising determining a fracture area of an injection well with a curved wellbore by inputting the curved wellbore path, a set of formation properties, and a fracturing operation, into a fracturing model. The curved wellbore path can promote fracture interference between fracture stresses extending from the injection wellbore. A production model can determine an economic value of the production fluids produced from at least one production well by determining a contact time for the injection fluids to traverse the formation. A design process can iterate the curved wellbore path of the injection well to produce a production fluid with an economic value above a threshold value.

The invention discloses a plateau multi-energy complementary agricultural energy management system and a plateau multi-energy complementary agricultural energy management method, and belongs to the technical field of new energy. Wind, light and terrestrial heat multi-energy complementation is cooperated with a battery energy storage system and a phase change heat storage system, and a central intelligent management system is used for carrying out priority scheduling and real-time monitoring and prediction on a load; efficient energy supply of irrigation, processing and greenhouse heating is achieved, the renewable energy utilization rate and the load satisfaction degree are remarkably improved, the operation cost and environmental pollution are reduced, safe and efficient operation of the system is ensured, and good economic and environment-friendly effects are achieved.

A system and method for geothermal heat production. A balanced geothermal energy transfer loop includes a first wellbore and a second wellbore extending from surface to a subterranean geothermal formation and a plurality of balanced open hole circuits extending between the first wellbore and the second wellbore through the geothermal formation, forming a substantially sealed closed loop. Each of the plurality of circuits is designed or modified to have a substantially equal circuit parameter. The circuit parameter may include one or more of circuit fluid velocity, circuit pressure drop, circuit volume and / or circuit length. The circuit parameter may include circuit length and volume, and the circuits connect the supply / return wells in a first out / last in configuration.

A geothermal reactor well system includes a closed-loop well coupled to one or more sources of reactants. The closed-loop well includes a first surface wellbore extending from a terranean surface to a geothermal subterranean zone and a second surface wellbore extending from the surface to the zone. A plurality of connecting wellbores connect the first surface wellbore to the second surface wellbore. At least a portion of the connecting wellbores are sealed against communication of fluids with the surrounding geothermal subterranean zone. A carrier fluid is disposed within the closed-loop well. The closed-loop well is configured so heat energy from the geothermal subterranean zone and / or reaction of reactants in the closed-loop well drives the fluids in the closed-loop well to circulate by thermosiphon and to thereby carry the reactants through the closed-loop well for the reaction and carry a product of the reaction through the closed-loop well for collection.

A method includes determining a specified demand as a function of time of thermal energy from a heat exchanger of a heat pump. The heat pump is configured to transfer thermal energy to the heat exchanger from a geothermal working fluid circulating in a closed-loop geothermal well. The closed-loop geothermal well includes a first surface wellbore extending from a terranean surface to a geothermal subterranean zone, a second surface wellbore extending from the terranean surface to the geothermal subterranean zone, and plurality of connecting wellbores connecting the first surface wellbore to the second surface wellbore The heat output from the heat exchanger is controlled to meet a specified demand by adjusting at least one of a flow rate or inlet temperature of the geothermal working fluid in the closed-loop geothermal well.

The invention provides a deep carbonate rock geothermal reservoir exploitation system, and relates to the technical field of geothermal energy exploitation. By analyzing the physical and mechanical properties of rock, the thermal expansion effect is induced by heat flow injection to generate fractures; the fracture width and the surface area are increased through dissolution of a hydrochloric acid-citric acid solution, and the solution concentration and the injection rate are optimized; thermal conductivity and temperature data of a reservoir are collected, the injection and production well spacing and flow are adjusted in real time, and heat-flow dynamic balance is achieved; a heat insulation layer material is installed on the inner wall of the shaft, the heat conduction coefficient and thickness of the heat insulation layer are optimized by monitoring shaft heat loss data, finally the heat loss control rate is generated to evaluate the heat insulation performance, and efficient and sustainable development of deep carbonate rock geothermal resources is achieved.

Methods and systems are provided for extracting thermal energy from a geothermal reservoir. One aspect involves drilling at least one sidetrack that extends from a primary wellbore and intersects at least one fracture target in the geothermal reservoir. The at least one sidetrack can be configured to increase fluid flow into the primary wellbore from the at least one fracture target. The increase of fluid flow into the primary wellbore from the at least one fracture target as provided by the at least one sidetrack can increase the amount of captured heat from the geothermal reservoir.

The present disclosure provides a non-condensable gas reduction system that is easy to maintain and returns non-condensable gas contained in geothermal fluid to a reduction well. [Solution] A non-condensable gas reduction system for use in a geothermal power plant, comprising a gas-liquid separator that separates geothermal fluid flowing from a production well into a first gas and a first liquid, a turbine that rotates by the first gas, and a condenser that cools the first gas that rotates the turbine and condenses the steam contained in the first gas into a second liquid, the non-condensable gas reduction system also comprising a pump that pressurizes a third liquid to be sent to a reinjection well, and an ejector that is driven by the third liquid, attracts non-condensable gas contained in the first gas that remains uncondensed in the condenser, and discharges a fourth liquid which is a mixture of the third liquid and the non-condensable gas, in which the first liquid and the fourth liquid are mixed and sent to the reinjection well.

Methods and systems for geothermal energy production wherein multiple horizontal or vertical wells may be used to pass fluids through the Earth from an injector well to a producer well through induced cracks, splits, fractures, conduits, or channels in the rock. Such methods and systems may include controlling tensile-split conduits in a subterranean geothermal formation by providing an injection well, providing a production well, configuring the injection well for injection of a tensile-splitting fluid into a production zone, configuring the production well to produce a heated fluid from the production zone, applying pressure to the production well, creating a plurality of tensile-split conduits, raising or lowering the pressure in the production well, establishing fluid communication between the injection well and the production well, and producing the heated fluid to the surface.

A coiled tubing system includes a coiled tubing string configured to couple to a downhole tool to move the downhole tool along a geothermal well, an injector head configured to control movement of the coiled tubing string and the downhole tool along the geothermal well, one or more sensors configured to capture sensor data indicative of a distance traveled by the coiled tubing string along the geothermal well, and a controller configured to control operation of the injector head to move the coiled tubing string and the downhole tool to a measured depth within the geothermal well that corresponds to an intersection of a feature with the geothermal well based on the sensor data received from the one or more sensors.

Systems and methods for generating electrical power in an organic Rankine cycle (ORC) operation include one or more heat exchangers incorporated into mobile heat generation units, and which will receive a heated fluid flow from one or more heat sources, and transfer heat therefrom to a working fluid that is circulated through an ORC unit for generation of power. In embodiments, the mobile heat generation units comprise pre-packaged modules with one or more heat exchangers connected to a pump of a recirculation system, including an array of piping, such that each mobile heat generation unit can be transported to the site and installed as a substantially stand-alone module or heat generation assembly.

A geothermally powered petrochemical refining system includes a geothermal system with a wellbore extending from a surface into an underground magma reservoir. A geothermally powered fractional distillation system receives crude oil and produces distillates which are separated by molecular weight. The distillates may be provided to a geothermally powered cracking system that is heated by a heat transfer fluid heated by the geothermal system to crack heavy hydrocarbons into lighter ones. The distillates may be provided to a geothermally powered reforming system that is heated by a heat transfer fluid heated by the geothermal system to reform hydrocarbons into different structures.

The various embodiments described herein include systems and methods for constructing geothermal fields. In one aspect, a system for constructing a geothermal field comprises a coiled tubing. The coiled tubing is configured for drilling one or more boreholes of the geothermal field. The coiled tubing is configured for inserting one or more geothermal loops into the one or more boreholes. The coiled tubing is also configured for grouting the one or more geothermal loop.

A controlled rate of propagation of the fluid saturation front or thermal front is desired in may oil and gas and geothermal operations. Natural fractures and fractures created during hydraulic stimulation may have heterogeneous hydraulic properties resulting in uneven flow distributions, therefore leading to short-circuiting and breakthrough issues. The present invention relates to wellbores connected hydraulically by multiple fracture zones; methods are directed to control for even flow distribution among fractures, regardless of heterogeneities in fracture hydraulic properties, and to control propagation of saturation fronts and thermal fronts in subsurface reservoirs.

The present disclosure provides a non-condensable gas reduction system that is easy to maintain and returns non-condensable gas contained in geothermal fluid to a reduction well. [Solution] A non-condensable gas reduction system for use in a geothermal power plant comprising a gas-liquid separator that separates geothermal fluid flowing from a production well into a first gas and a first liquid, an evaporator that performs heat exchange between the first gas and a working medium, a turbine that rotates by the working medium discharged from the evaporator, and a condenser that cools the working medium that rotates the turbine and condenses the working medium into a liquid, the non-condensable gas reduction system comprising: a pump that pressurizes a third liquid to be sent to a reinjection well; and an ejector driven by the third liquid, that attracts non-condensable gas contained in the first gas and remaining uncondensed in the evaporator, and discharges a fourth liquid which is a mixture of the third liquid and the non-condensable gas, wherein the first liquid and the fourth liquid are mixed and sent to the reinjection well.

Methods and systems for geothermal energy production wherein multiple horizontal or vertical wells may be used to pass fluids through the Earth from an injector well to a producer well through induced cracks, splits, fractures, conduits, or channels in the rock. Such methods and systems may include controlling tensile-split conduits in a subterranean geothermal formation by providing an injection well, providing a production well, configuring the injection well for injection of a tensile-splitting fluid into a production zone, configuring the production well to produce a heated fluid from the production zone, applying pressure to the production well, creating a plurality of tensile-split conduits, raising or lowering the pressure in the production well, establishing fluid communication between the injection well and the production well, and producing the heated fluid to the surface.

The invention discloses a Carnot battery system based on a cross-seasonal energy storage technology and a control method, and the Carnot battery system comprises a cascade heat pump unit, a buried pipe heat storage unit, an organic Rankine cycle unit and a renewable heat source utilization energy storage unit, when the temperature of the external environment is high in summer, heat exchange with the external environment can be conducted through the first heat removal and exchange module to provide a heat source for the second heat removal and exchange module, and heat exchange is conducted through the second heat removal and exchange module so that the temperature of a power generation fluid medium can be increased; when the external environment temperature is low in winter, a heat source can be provided for the second heat removal and exchange module through heat exchange between the first heat exchange module and the buried pipe heat storage unit, heat exchange is conducted through the second heat removal and exchange module so that the temperature of a power generation fluid medium can be increased, and the energy storage system is prevented from being affected by the external temperature; and high-efficiency operation in different seasons is ensured. The method provided by the invention solves the technical problem of low power generation efficiency in winter by utilizing environment heat exchange in the Carnot battery energy storage technology in the prior art.

According to the charging station heat exchange method based on the ground source system, a ground source heat pump system is adopted as heat exchange equipment, and the heat exchange efficiency of a charging station is effectively improved through underground low-temperature heat energy; real-time regulation and control of the battery temperature of the new energy automobile are achieved by regulating and controlling the operation parameters of the ground source heat pump unit in real time, and safe operation of the battery is guaranteed; the heat generated by the charging pile and the new energy automobile is recovered and recycled, the energy consumption of the charging station is reduced, and the problems that the heat dissipation effect of an existing charging station heat dissipation mode is greatly influenced by the environment temperature, and the heat dissipation effect is poor in high-temperature weather are solved; an air cooling system is loud in noise and affects the surrounding environment; a water cooling system needs to replace cooling liquid at regular intervals, and the maintenance cost is high.

Methods are provided for extracting thermal energy from a geothermal reservoir having at least one feature extending therethrough, which involve drilling or accessing a production well that intersects the at least one feature, wherein the at least one feature provides a flow path of pressurized geothermal fluid into the production well. Well log data can be analyzed to determine position of the at least one feature in the production well. One or more interventions, or combinations of interventions, can be performed to open the feature or otherwise enhance the flow rate of pressurized geothermal fluid carried by the feature into the production well. The intervention(s) can be performed on multiple features that connect to the production well. The method can also be applied to multiple production wells.

The present invention discloses a system and method for preventing and controlling frost heave damage in railway subgrades adapted to severe cold climates. This system belongs to the field of seasonal frozen soil engineering technology. The prevention and control system includes several ground-source heat pump devices consisting of heating units, heating pipes, heat collecting pipes, and a detection assembly. Several heating units are arranged at the foot of the subgrade slope along the length of the railway. The heating pipes are laid in the frost heave development layer of the subgrade, and the heat collecting pipes are installed in the stable layers of the foundation on both sides of the subgrade. A heat carrier circulates through the pipeline consisting of the heating pipes, heating units, and heat collecting pipes. Temperature sensors, pressure sensors, and displacement sensors are used to monitor the subgrade freezing temperature, heat carrier temperature, compressor intake and exhaust pressures, and track deformation, respectively. A control assembly receives signals from the detection assembly and controls the operating mode of the heating units. The present invention ensures rapid compressor superheat establishment during startup in severe cold environments and rationally controls the compressor exhaust temperature range and operating mode during normal operation.

The present disclosure is directed to a geothermal hydrogen production system, comprising; a primary liquid circuit circulating a liquid into a geothermal well and returning heated liquid from a well head of the geothermal well, the primary liquid circuit passing through a desalination plant; a first turbine driven by the heated liquid to produce a first mechanical output; and a second turbine driven by the heated liquid to produce a second mechanical output, wherein the first mechanical output drives an electrical generator, configured to power an electrolyser generating hydrogen via electrolysis of fresh water, and the second mechanical output drives an air compressor to provide at least one of a first, a second and a third compressed air supply, wherein the first compressed air supply drives a supply pump to supply salt water to the desalination plant, the second compressed air supply drives a start-up pump to initiate the primary liquid circuit, and the third compressed air supply drives a fresh water pump to deliver fresh water from the desalination plant to the electrolyser.

The invention discloses a railway roadbed frost heaving disease prevention and control system and method adapting to severe cold climate, and belongs to the technical field of seasonal frozen soil engineering.The prevention and control system comprises a plurality of ground source heat pump devices composed of heating units, heat supply pipes, heat collection pipes and detection assemblies, and the heating units are arranged at the slope toe position of a roadbed in the length direction of a railway; the heat supply pipe is laid on a frost heaving development layer of a roadbed, the heat collecting pipes are arranged on stable layers of the roadbed on the two sides of the roadbed, and the heat-carrying agent circularly flows in a pipeline composed of the heat supply pipe, the heating unit and the heat collecting pipes. A temperature sensor, a pressure sensor and a displacement sensor are used for monitoring the roadbed freezing temperature, the heat-carrying agent temperature, the suction and exhaust pressure of a compressor and the deformation amount of a track; and the control assembly receives a signal of the detection assembly and controls the operation mode of the heating unit. According to the method, rapid establishment of the superheat degree of the compressor in the starting stage in the severe cold environment and reasonable control over the exhaust temperature range and the operation mode of the compressor in the normal operation stage can be guaranteed.

The present disclosure relates to a geothermal carbon capture system, comprising; a primary liquid circuit circulating liquid into a geothermal well and returning heated liquid from a well head of the geothermal well, the primary liquid circuit passing through a condenser; a turbine driven by the heated liquid to power a compressor configured to draw in and compresses ambient air to feed a first compressed air supply and a second compressed air supply, wherein the first compressed air supply is directed to a separator to extract carbon dioxide therefrom; and the second compressed air supply drives a pump to force the carbon dioxide extracted from the separator towards a reinjection well for reinjection into geology surrounding the reinjection well.

The invention discloses a geological battery energy storage system and an operation method. The system comprises a medium and low temperature heat storage module, a high temperature heat storage module and a heat engine circulation module. In the heat storage process, low-grade waste heat can be pumped to the medium temperature to be stored in the medium-low temperature heat storage well, or a solar heat collector, an air source heat pump and the like are used for conveying medium-low temperature heat sources to be stored in the medium-temperature heat storage well. In the charging process, a heat source of the medium-low temperature heat storage module is upgraded and stored in a high-temperature heat storage well by using electric power to drive heat pump circulation; in the discharging process, heat engine circulation is adopted to convert stored high-grade heat energy into electric energy. According to the invention, multiple types of underground spaces can be fully utilized to promote new energy consumption, the stability of a power grid is improved, and meanwhile, concealment and safety are achieved.

In a general aspect, a carbon dioxide (CO2) removal system uses geothermal energy. In some implementations, a method to remove CO2 gas from a gaseous feed includes directing a gaseous feed to interact with an alkaline capture solution in a first gas-liquid contactor. A first portion of CO2 from the gaseous feed dissolves into the alkaline capture solution to form a CO2-rich alkaline capture solution. Steam is generated using heat from a geothermal heat source, and the steam heats the CO2-rich alkaline capture solution in a second gas-liquid contactor. A second portion of the CO2 is separated from the CO2-rich alkaline capture solution in the second gas-liquid contactor to form a CO2-lean alkaline capture solution. The CO2-lean alkaline capture solution is directed to the first gas-liquid contactor.

The present disclosure provides a non-condensable gas reduction system that reduces the effects of atmospheric components contained in gas that is reduced in the reduction well. [Solution] A non-condensable gas reduction system in a geothermal power plant returns non-condensable gas that remains uncondensed when cooled from a first gas contained in geothermal fluid that springs from a production well to a reinjection well. The non-condensable gas reduction system comprises: a pump that pressurizes the first liquid sent to the reinjection well; an ejector that is driven by the first liquid, attracts the non-condensable gas, and discharges a second liquid that is a mixture of the first liquid and the non-condensable gas; and a gas separator connected downstream of the ejector that separates the second gas containing atmospheric components that has been mixed into the second liquid, and discharges the second gas into the atmosphere while discharging the second liquid into the reinjection well.

A system for geothermal heating, the system comprising a forced geothermal circuit disposed in a well bore. The system also comprise a well bore heat exchanger and an pump. The system may further comprise a circulation fluid and flux co-inverter. A method for geothermal heating, the method comprising passing a fluid into a thermal circulation system; passing the fluid into a well bore heat exchanger; passing reservoir fluid into an annulus space; and passing the reservoir fluid through a sub-surface formation.

Methods and systems are provided for extracting thermal energy from a geothermal reservoir. One aspect involves drilling at least one sidetrack that extends from a primary wellbore and intersects at least one fracture target in the geothermal reservoir. The at least one sidetrack can be configured to increase fluid flow into the primary wellbore from the at least one fracture target. The increase of fluid flow into the primary wellbore from the at least one fracture target as provided by the at least one sidetrack can increase the amount of captured heat from the geothermal reservoir.

An apparatus to be positioned in a geothermal wellbore formed in a subsurface formation. The apparatus comprises one or more components to inject a supercritical fluid into the subsurface formation. The apparatus comprises a flow control assembly configured to control flow of the supercritical fluid into the geothermal wellbore based on a density of the supercritical fluid in the subsurface formation.