274results about "Collector components/accessories" patented technology

The invention relates to a solar cross-seasonal heat storage and release ground source heat pump system and a balance control method and device, and relates to the technical field of ground source heat pump systems. The ground source heat pump subsystem comprises a ground heat exchanger group which is arranged in a partitioned manner; and the cross-seasonal heat storage device is used for storing and releasing solar heat and is thermally coupled with the buried pipe heat exchanger group, the cross-seasonal heat storage device is of an underground concrete structure, and three temperature gradient areas of a high-temperature layer, a medium-temperature layer and a low-temperature layer are arranged in the cross-seasonal heat storage device. Through the synergistic effect of the dynamic load distribution mechanism and the layered heat storage strategy, the problem of soil cold and heat accumulation caused by long-term operation of the ground source heat pump system can be effectively relieved. Differential design of the core heat exchange area and the buffer temperature adjustment area is combined with a multi-objective optimization algorithm, so that the difference value of annual accumulated heat taking capacity and heat supplementing capacity is controlled within 5%, and the self-recovery capacity of the soil thermal field is remarkably improved.

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 invention relates to the technical field of multi-source data fusion and grid modeling, and discloses a shallow geothermal energy development modeling method, system and equipment based on multi-source data fusion. The method comprises the following steps: performing joint interpolation on shallow geothermal data, engineering geological data and hydrogeological data to generate a virtual drill hole; constructing a ground temperature grid model according to shallow geothermal data, virtual drilling and anisotropic interpolation constraints; performing step-by-step color setting and rendering on the shallow geothermal attribute grade of the geothermal grid model to obtain a visual geothermal grid model; and generating a stepped temperature distribution profile map and a temperature contour line according to the ground temperature grid model so as to display stepped features of temperature distribution. According to the method, the high-precision and high-reliability ground temperature grid model is constructed through multi-source data fusion, virtual drilling generation and anisotropic modeling technologies, and the model not only can generate a stepped temperature distribution profile map and a temperature contour line, but also can improve the geological parameter inversion precision and the thermal reservoir prediction reliability.

The invention belongs to the technical field of terrestrial heat application, and particularly relates to an underground heat removal device. The underground heat removal device comprises a heat exchange unit used for exchanging heat with geothermal water; the outer oil pipe is arranged at the upper part of the heat exchange unit; the inner oil pipe is arranged in the outer oil pipe, the two ends of a first annular space between the inner oil pipe and the inner oil pipe are sealed, and a vacuumizing opening communicated with the first annular space is formed in the outer oil pipe.

The present application relates to the technical field of cogeneration system optimization, in particular to a heat and electricity decoupling system based on geothermal long-time energy storage and a control method. By constructing a low-temperature underground aquifer energy storage unit (ATES), combined with an electric heat pump unit (EHP) to recover the waste heat of a cogeneration unit (CHP), the CHP is deeply decoupled from heat and electricity through collaborative operation. Through intelligent scheduling strategy, the heat supply ratio is dynamically allocated, the power generation adjustment range of the cogeneration unit (CHP) is improved, the wind power consumption capacity is improved, the wind power curtailment rate is reduced, and it is suitable for centralized heating scenarios with high wind power penetration rate.

A system includes a power unit, and a coiled tubing (CT) reel for spooling a CT string. The system includes a CT injector for injecting the CT string from a surface into a subsurface to construct a geothermal borehole. The CT injector includes a gooseneck for guiding the CT string into a body of the CT injector. The system includes a first arm for coupling the CT reel and the power unit. The system includes a second arm for coupling the CT injector and the power unit. The system is configured to modify the distance between the CT reel and the gooseneck by adjusting at least one of (i) the length of the first arm or (ii) the length of the second arm.

The invention provides a deep geothermal coaxial heat exchange system based on a reducer pipe and a branch structure, and relates to the technical field of energy exploitation. The system is composed of ground energy supply and control equipment, a geothermal well and an underground heat exchange pipe network, the underground heat exchange pipe network is arranged in the geothermal well and comprises a first casing pipe, a second casing pipe, a third casing pipe and a branch pipe, and the first casing pipe, the second casing pipe and the third casing pipe are sequentially in butt joint and communication; the first annulus channel, the second annulus channel and the third annulus channel form a cold water injection channel, the inner diameter of the first casing pipe is larger than that of the second casing pipe, and the inner diameter of the second casing pipe is larger than that of the third casing pipe; the first central pipe, the second central pipe and the third central pipe are sequentially butted and communicated to form a hot water backflow channel, and the inner diameter of the first central pipe is larger than that of the second central pipe. According to the technical scheme, the heat exchange contact area of the fluid and the stratum can be increased, the heat exchange efficiency is improved, and meanwhile coordinated matching of the injection-production flow and the heat exchange capacity is achieved.

A groundwater heat exchanger includes a distributor, a collector, a plurality of heat exchange pipes, and a housing. The distributor includes a first interior chamber and a first port. The collector includes a second interior chamber and a second port. Each heat exchange pipe includes a first end attached to the distributor and a second end attached to the collector, and defines a fluid passageway between the first and second interior chambers. The housing surrounds the heat exchange pipes and defines a groundwater passageway along the heat exchange pipes that is configured to receive a groundwater flow. In one example, a loop fluid flow received at the first port flows into the first interior chamber, then flows from the first interior chamber to the second interior chamber through the plurality of heat exchange pipes, and flows from the second interior chamber out the second port.

The invention discloses a tail water recharge system of a middle-deep geothermal well and a working method, and particularly relates to a recharge well, a vacuum breaker, a flowmeter, a control system, a remote monitoring device, a steady flow tank, an impurity filtering device, a vacuum detection device and a temperature control device. According to the tail water recharge system of the middle-deep geothermal well and the working method, the vacuum breaker is additionally arranged in the recharge well, so that the problem of negative pressure generated in the recharge process is effectively solved, a vacuum column is prevented from being formed in a heating system, the heating effect is improved, the geothermal dynamic monitoring work is simplified, and the working efficiency is improved. The vacuum breaker is arranged so that tail water can be smoothly recharged into a heat storage layer, the situation that air enters a recharge system is avoided, the quality of the tail water is kept, a recharge channel is prevented from being blocked, the recharge efficiency is improved, complex equipment such as a sand remover, a filtering tank and an exhaust tank does not need to be arranged, the system structure is simplified, and the system cost is reduced. And meanwhile, the recharge efficiency is improved.

A geothermal heat extractor includes a heat transfer fluid and a heat transfer fluid supply conduit. The heat transfer fluid is maintained in the supply conduit in a liquid state at a pressure above its saturation pressure. The geothermal heat extractor further includes a heat transfer fluid return conduit, a geothermal heat source coupled thereto, at least one flow control valve configured to control the flow of the heat transfer fluid from the supply conduit to the return conduit, and an external load coupled to the return conduit. As the heat transfer fluid is provided to the return conduit in the liquid state, the heat transfer fluid vaporizes in the return conduit by heat supplied to the return conduit from the geothermal heat source. The vaporized heat transfer fluid is supplied from the return conduit to the external load.

A geothermal system obtains heated heat transfer fluid via heat transfer with an underground reservoir of magma. The geothermal system includes a wellbore extending between a surface and into the underground reservoir of magma. A fluid pump provides a flow of heat transfer fluid toward the underground reservoir of magma. A fluid conduit extends from the surface toward a terminal end of the wellbore and allows flow of heated heat transfer fluid from a portion of the wellbore that extends into the underground reservoir of magma toward the surface.

The invention relates to the technical field of geothermal energy development and utilization, and discloses a multi-well cooperative enhanced heat exchange method for medium-deep layer geothermal energy waterless exploitation. According to the method, an inverted-cone-shaped heat conduction network comprising a center main heat collecting well, an auxiliary heat conduction well array and a temperature-sensitive phase change heat conduction bridging grouting area is constructed. During operation, a low-temperature working medium is injected into the central well to reduce the temperature of the grouting area to be below the phase change temperature, phase change shrinkage of the microcapsules is triggered, the high-thermal-conductivity filler is induced to make contact with one another, a thermal-conductivity seepage network is constructed, and the thermal conductivity of the grouting area is converted into an enhanced state from a ground state. The auxiliary heat conduction well gathers far-field heat and transmits the far-field heat to the center well according to the gravity assisted heat pipe principle. According to the invention, the microstructure evolution of the material is driven by using a temperature field, the self-adaptive adjustment of the heat conductivity is realized, the heat removal volume is obviously enlarged, the heat loss of the shaft during the non-operation period is reduced, the geothermal energy exploitation efficiency is improved, and the reverse loss of the heat of the working medium in the shaft to the stratum during the non-operation period is reduced.

A valve assembly suitable for use in a high temperature well, such as a geothermal well. The valve assembly comprises a tubular housing having ports to allow fluid communication between a fluid passageway in the valve assembly and the outside of the valve assembly, an outer sleeve longitudinally slidable in the tubular housing, and an inner sleeve longitudinally slidable in the outer sleeve. The outer and inner sleeves are slidable to various positions to prevent, allow or restrict flow through the ports. The valve assembly may include sealing assemblies that can withstand high temperatures, frangible plugs in the ports that can be sheared to open the ports, and / or a coupling member for coupling the inner and outer sleeve while the ports are being opened. The valve assembly may have ports configured in a manner that allows for sequential opening of the ports.

A geothermal system exchanges heat between ground which receives geogenic heat 1 from below and a target 7, comprises a continuous loop of heat exchange tubing 3 placed in a region of the ground and s

A geothermal absorber is a prefabricated module for geothermal heat absorption. The geothermal absorber of the present invention comprises a cylindrical base body containing a fluid-loaded heat exchanger (10). The end sections of the cylindrical module base body (1) are sealed in a fluid-tight manner by means of a head assembly (2) and a closure piece (3). The head assembly (2) is designed to connect the heat exchanger (10) of the geothermal absorber, located inside the cylindrical module base body (1), to a heat consumer.

The invention discloses a geothermal energy vertical heat conduction system and a control method, and relates to the technical field of geothermal application, and the geothermal energy vertical heat conduction system comprises a medium circulation loop which comprises a steam guide channel, an underground heat exchange assembly, a liquid injection channel and an overground heat exchange assembly which are sequentially connected in series and closed, and the medium circulation loop is filled with a heat exchange medium; the underground heat exchange assembly is used for exchanging heat with underground heat energy, and the overground heat exchange assembly is used for exchanging heat with an overground load module; the vacuum pump assembly communicates with the medium circulation loop and is used for forming negative pressure in the underground heat exchange assembly; according to the geothermal energy vertical heat conduction system and the control method, the pressure in the medium circulation loop and / or the underground heat exchange assembly is reduced through the vacuum pump assembly, then the boiling point of the heat exchange medium is reduced, the heat exchange medium is accelerated to be converted into the gas state from the liquid state, heat is carried to float to the ground surface through the steam guide channel, and the geothermal energy collection efficiency is improved.

The invention relates to the technical field of geothermal energy development, in particular to an automatic operation control method and tool for a geothermal energy unit, and the method comprises the steps: building a digital model and interface configuration of each device in the geothermal energy unit, and obtaining key data of the devices; determining the priority of the equipment according to the key data of the equipment, and starting the equipment of each subsystem through the priority of the equipment; wherein the geothermal energy unit comprises a plurality of subsystems; automatic operation of the geothermal energy unit is carried out through dynamic adjustment of an equipment set number instruction; and according to the priorities of the devices, automatic fault switching between the devices is carried out during the automatic operation period of the geothermal energy unit. The stability and the energy efficiency of the geothermal energy unit system are optimized, and the accuracy of automatic operation control of the geothermal energy unit is improved.

The invention provides a single well closed circulation and gravity assisted heat pipe coupling type heat exchange system, and mainly relates to the technical field of geothermal resource development. A single well closed circulation and gravity assisted heat pipe coupling type heat exchange system comprises a first heat collection unit, a second heat collection unit, a first heat pump system, a second heat pump system and an indoor heat dissipation unit, and the indoor heat dissipation unit is connected with the output end of the first heat pump system and the output end of the second heat pump system. And the first heat collecting unit is used for receiving and dissipating heat transmitted by the first heat pump system and the second heat pump system, the first heat collecting unit adopts a gravity assisted heat pipe assembly, and the second heat collecting unit adopts a single-well closed circulation heat exchanger. The system has the beneficial effects that a single well closed circulation and gravity assisted heat pipe coupling mode is adopted, cooperative work of two efficient heat collecting modes is achieved, closed design is adopted in the whole system, geothermal water is not extracted or recharged, and the heating reliability can be greatly improved through the design of the double heating systems.

The invention discloses an injection-production linkage control method based on well-ground multi-domain data, belongs to the technical field of injection-production monitoring and control, and can solve the problem that in the prior art, fusion perception of underground-ground multi-source information, second-level abnormity early warning and linkage intelligent control of injection-production parameters cannot be achieved at the same time. The method comprises the following steps: S1, determining a state feature vector of a to-be-measured well in a corresponding sampling period according to collected underground sensing data and ground sensing data; s2, determining a risk index of the to-be-measured well in the current sampling period according to the state feature vectors of the to-be-measured well in different sampling periods; s3, constructing a return function of the to-be-measured well in the current sampling period according to the state feature vector and the risk index of the to-be-measured well in the current sampling period; and S4, solving a return function of the to-be-measured well in the current sampling period, and controlling the injection-production action of the injection-production equipment of the to-be-measured well in the next sampling period according to the solved optimal control strategy. The method is used for injection-production linkage control.

A system and method are provided for installing a well for a borehole heat exchanger. The method includes drilling a hole formation to a predetermined depth relative to a ground surface, including operating a bottomhole assembly (BHA) including a drill bit supported at a bottom end of a cable positioned within a flexible tube. After drilling the hole formation to a predetermined depth, the BHA is retracted through the flexible tube to remove the BHA from the hole formation while the flexible tube remains in the hole formation.

The invention provides a hydrothermal geothermal well bore structure and a well completion method, and the structure comprises an intelligent management and control system which comprises a hierarchical control module, a distributed monitoring network and a performance evaluation unit. The hierarchical control module, the distributed monitoring network and the performance evaluation unit form closed-loop control of parameter acquisition, data analysis and regulation and control execution through a preset logic interaction link; the well body structure comprises a main well section, a branch well section and a multi-ring enhanced heat exchange unit, the main well section and the branch well section are in sealed communication through a directional butt joint component, the multi-ring enhanced heat exchange unit is arranged around the tail end of the branch well section, and the tail end of the branch well section is further provided with a functional heat collecting assembly matched with a heat storage layer. According to the invention, a core management and control layer of the hierarchical control module plans a global strategy as a whole, and a partition control layer performs directional regulation and control according to an efficient / balanced / emergency mode and executes a driving layer landing physical action; the whole section of the distributed monitoring network covers three types of monitoring nodes of environment, structure and performance.

This layout (12) comprises at least one heat exchange unit (24) comprising: - at least one central well (26) extending from the surface of the subsoil (22); - at least one flank well (28) extending from the surface of the subsoil (22) and having an inclined lateral portion (48); - at least two separate drains (30) connecting the central well (26) and the inclined lateral portion (48) of the flank well (28). For the or each heat exchange unit (24), the central well (26), the flank well (28) and each drain (30) are set out in the one same vertical plane, the intersections between the drains (30) and the central well (26) and between the drains and the inclined lateral portion (48) being separated from one another and the drains (30) opening inclined by an angle less than 45° with respect to the inclined lateral portion (48).

The invention relates to a same-well extraction and irrigation method and system for an L-shaped well. The system comprises at least one well group, each well group at least comprises two L-shaped wells arranged at intervals, and well pipes are arranged in the L-shaped wells; the at least one heat compensation system is matched with the well group; the control device is arranged corresponding to the well group, the heat supply input end is connected with the water outlet end of the L-shaped well, the heat supply output end is connected with a lower-stage unit, the heat compensation input end is connected with the heat compensation system, the heat compensation output end is connected with the well pipe, and the control device is configured to decide the working mode of the L-shaped well in the same group and the regulation and control state of the well pipe based on the heat supply output end and the water outlet temperature of each well. The method specifically comprises the steps of judging the working mode and the recovery mode of the L-shaped well, selecting the recovery mode and adjusting the water outlet flow. The collecting modules are arranged at the water outlet ends of the L-shaped wells and the heat supply output end of the control device. Through well group binding, real-time monitoring and intelligent regulation and control, parallel heat collection and recovery are achieved, and heat supply continuity and energy recycling are guaranteed.

The invention discloses a coaxial sleeve type water body heat storage system and method based on a vertical shaft of a shut-off and retreat mine. A coaxial sleeve with a deep inner part and a shallow outer part is mounted in the center of a top sealing well cover of the vertical shaft which is sealed by a sealing and filling section; the outer pipe and a well wall annulus form a cement sheath which is matched with a casing hanger to share the weight of the casing; a one-way valve and a perforated screen pipe are arranged at the specific depth of the inner pipe to form a two-way heat storage adaptive assembly. According to the method, natural rebound underground water serves as a medium, a high-temperature heat source heat storage mode and a low-temperature heat source heat storage mode are switched according to the relation between the heat storage heat source temperature and the original ground temperature of the top face of a shaft sealing and filling section, in the non-heating season, water is pumped through an outer pipe for heating and then recharged for heat storage, in the heating season, reverse circulation heat release heating is conducted, and the low-temperature mode can synchronously provide summer cold loads. The method adapts to the large-diameter and large-depth characteristics of a shaft, large-scale cross-season heat storage is achieved, mine remaining resources are fully utilized, the heat storage cost is reduced, the method adapts to various heat sources, the space-time intermittency of renewable energy sources is relieved, and green and low-carbon transformation of closed and retreated mines is promoted.

The disclosure provides a connection device for supply and return lines of heat transfer fluid of a geothermal probe. The connection device includes an inlet connection designed to connect to a supply line of heat transfer fluid, and an outlet connection intended for a return line. It features a first tubular portion connected to the inlet connection and a second tubular portion connected to the outlet connection. Additionally, a third tubular portion is connected to either the first or second tubular portion. The first tubular portion includes a tubular bending section that connects to the second tubular portion, forming a tubular U-shape, allowing fluid to flow from the inlet through the first and second tubular portions to the outlet. The first tubular portion extends longitudinally beyond a central transversal plane located centrally between the inlet connection and the outlet connection. The third tubular portion acts as a tubular appendix to the U-shape. The connection device is formed as a single piece. The disclosure also provides a method for forming the aforementioned connection device in a single step, preferably through injection moulding using a mould with a collapsible core.

A wellbore is drilled in a subterranean zone with a drill bit of a drilling string. The drilling string includes tubing and a fluid separator uphole of the drill bit. While drilling, a drilling fluid is flowed through an interior of the drilling string and through the fluid separator. The fluid separator separates, from the drilling fluid, a fluid stream having a higher water-to-oil ratio than a remainder of the drilling fluid Uphole of the drill bit, the fluid stream is diverted from the fluid separator to an annulus around the exterior of the drilling string based on a specified temperature of a drilling string component while the remainder of the drilling fluid flows from the fluid separator to the drill bit.

A method for collecting a heated fluid from a fractured subterranean formation can include removing a fluid having a liquid phase from the fractured subterranean formation through a wellbore that is in fluidic communication with the fractured subterranean formation. The method can also include collecting from the wellbore the heated fluid having a vapor phase that is expelled from a low permeability rock matrix of the fractured subterranean formation. The method can also optionally include injecting an injection fluid having the liquid phase into the low permeability rock matrix of the fractured subterranean formation through the wellbore when a parameter falls outside a range of acceptable values.

The invention relates to the technical field of cogeneration system optimization, in particular to a geothermal long-time energy storage-based thermoelectric decoupling system and a control method. A medium and low temperature underground aquifer energy storage unit (ATES) is constructed, an electric heat pump unit (EHP) is combined to recover waste heat of a cogeneration unit (CHP), and deep thermoelectric decoupling of the CHP is achieved through cooperative operation. The heat supply proportion is dynamically distributed through an intelligent scheduling strategy, the power generation adjusting range of a combined heat and power generation unit (CHP) is widened, the wind power absorption capacity is improved, the wind power generation abandoned electricity rate is reduced, and the method is suitable for a centralized heat supply scene with the high wind power permeability.

The invention discloses an installation control method, system and equipment of a geothermal loop, a medium and a program, and belongs to the technical field of geothermal installation. The method comprises the steps that thermal load demand prediction is carried out based on building feature information and environment feature information of a heat supply building, and the maximum thermal load demand is obtained; constructing a heat exchange predictor according to the collected soil characteristic information of the geothermal area; by means of a heat exchange predictor, loop layout scheme optimization is carried out with the purpose of meeting the maximum heat load requirement, and an optimal loop layout scheme is obtained; and according to the optimal loop layout scheme, an installation control scheme of the geothermal loop is formulated. According to the method, the heat load is accurately predicted according to the building and environment characteristics, the loop layout scheme is optimized in combination with the soil characteristics, and the heat supply efficiency of the geothermal system is improved.