A geothermal well includes a borehole formed in a geologic formation. The borehole includes a first portion extending from a first end to a second end and a second portion intersecting the first portion at a first depth. The second portion is exposed to the formation for heating a fluid flowing in the second portion. The well includes an outer string disposed in the first portion where a lower end of the outer string is disposed above the first depth. The well includes an inner string disposed though the outer string and an annulus formed between the inner string and the outer string. The well includes a choke fluidly coupled to at least one of the annulus or the inner string. The choke is configured to regulate return flow of the heated fluid to maintain surface backpressure above a boiling pressure of the heated fluid at surface.

A heat transfer pipe embedded in a prefabricated pipe pile including a plurality of prefabricated pipe piles, a heat transfer pipe component and a pump assembly; the prefabricated pipe pile sealed by closing the bottom thereof and sides of which are provided with inclined holes; a locking pin provided at an inner wall of the pipe pile; a steel plate provided on the locking pin, and a steel bar structure bound on the steel plate; the heat transfer pipe component comprises a horizontal heat transfer pipe communicated with a vertical heat transfer pipe with both pipes communicated with the pump assembly, the horizontal pipe embedded and fixed via the steel bar structure, the vertical heat transfer pipe passes through the inclined holes and fixed in the pipe pile via a steel bar bracket.

A method for utilizing the inner energy of an aquifer fluid includes geothermal thermal water mixed with gas and optionally crude oil in a closed cycle to obtain an environmentally-neutral, carbon-dioxide-free utilization of the aquifer fluid and an environmentally-friendly supply of electric and thermal energy. An aquifer fluid is removed from an aquifer by means of a removal device, gas is separated by degassing the aquifer fluid in a gas-separation device, optionally crude oil is separated if necessary, the heat energy of the thermal water is utilized in at least one system for utilizing the thermal energy, the extracted gas and the optionally separated crude oil is com busted in at least one combustion device and the inner energy of the gas is utilized by operating a generator, the CO.sub.2 being removed from the waste gas and recycled into the aquifer.

Systems and methods for generating and a controller for controlling generation of geothermal power in an organic Rankine cycle (ORC) operation to thereby supply electrical power to one or more of in-field operational equipment, a grid power structure, and an energy storage device. In an embodiment, during hydrocarbon production, a temperature of a flow of heated fluid from a source or working fluid may be determined. If the temperature is above a vaporous phase change threshold of the working fluid, heat exchanger valves may be opened to divert flow of heated fluid to heat exchangers to facilitate heat transfer from the flow of wellhead fluid to working fluid through the heat exchangers, thereby to cause the working fluid to change from a liquid to vapor, the vapor to cause a generator to generate electrical power via rotation of an expander.

Systems and methods for generating and a controller for controlling generation of geothermal power in an organic Rankine cycle (ORC) operation to thereby supply electrical power to one or more of in-field operational equipment, a grid power structure, and an energy storage device. In an embodiment, during hydrocarbon production, a temperature of a flow of heated fluid from a source or working fluid may be determined. If the temperature is above a vaporous phase change threshold of the working fluid, heat exchanger valves may be opened to divert flow of heated fluid to heat exchangers to facilitate heat transfer from the flow of wellhead fluid to working fluid through the heat exchangers, thereby to cause the working fluid to change from a liquid to vapor, the vapor to cause a generator to generate electrical power via rotation of an expander.

A geothermal heat exchange apparatus which is a flexible assembly of a plurality of pipes twisted on a central conduit. The central conduit has a tubular structure. The plurality of pipes is twisted around the central conduit. The plurality of pipes is connects to an external environmental conditioning apparatus that supplies a heat exchange liquid for the transfer of heat through the plurality of pipes. The geothermal heat exchange apparatus is adapted for positioning in a hole in the earth for the exchange of heat.

Renewable geothermal energy harvesting methods may include distributing the working fluid from a ground surface into thermal contact with at least one subterranean geothermal formation; transferring thermal energy from the subterranean geothermal formation to the working fluid; distributing the working fluid from the subterranean geothermal formation back to the ground surface; and distributing the working fluid directly to at least one thermal application system. The thermal application system may be configured to utilize the thermal energy to perform work. The thermal energy may be utilized at the thermal application system to perform the work. Renewable geothermal energy harvesting systems are also disclosed.

A system for utilizing excess heat during a subsea field operation can include a subsea manifold configured to transfer a subterranean resource to a pipeline located subsea, where the subterranean resource radiates the excess heat after being transferred out of the subsea manifold. The system can also include a subsea power generation system that receives the excess heat from the subterranean resource as the subterranean resource is transferred from the subsea manifold to the pipeline, where subsea power generation system uses the excess heat to generate electrical power.

A tubing is anchored in a boiler casing positioned in a borehole that extends into a magma reservoir. The tubing may include a notch that is secured to a tubing anchor receptacle of the boiler casing. The boiler casing may include a float shoe that helps to prevent or restrict the flow of magma from the magma reservoir into the boiler casing and tubing.

A tubing is anchored in a boiler casing positioned in a borehole that extends into a magma reservoir. The tubing may include a notch that is secured to a tubing anchor receptacle of the boiler casing. The boiler casing may include a float shoe that helps to prevent or restrict the flow of magma from the magma reservoir into the boiler casing and tubing.