A heat exchange circuit for a geothermal plant comprising a well excavated in the rock, a casing arranged inside the well, integral with it and comprising at least a first perforated section extending along a first portion of the well and at least a second perforated section extending along a second portion of the well, the perforated sections allowing the exit and the entry of a flow of geothermal fluid contained in an aquifer, an internal duct, located inside the casing in which a heat transfer fluid flows, wherein the well, the casing and the internal duct being arranged as a substantially closed ring, except for at least one surface interruption, at least one heat-exchange section at the bottom of the well between the first portion and the second portion of the well within which the geothermal fluid transfers heat to the heat transfer fluid.

A drilling rig and methods are provided for using multiple types of drilling when installing geothermal systems. The drilling rig can perform sonic drilling such as percussive sonic drilling and a type of non-sonic drilling. Control switching valves are added to the hydraulics of the drilling rig to selectively provide sufficient flow of hydraulic fluid to motors used in the multiple types of drilling, depending on which type of drilling is currently most efficient for the underground formation being drilled. The water pump and hydraulic motor for such have been designed to handle both types of drilling on a small drilling rig frame, thereby allowing for the drilling to occur in space-constrained environments. A method of recycling water used to remove cuttings during drilling to put back downhole is also provided.

System, method, and apparatus for harnessing geothermal power from superhot geothermal fluid (SHGF) and magma reservoirs. An exemplary embodiment is directed to a cased wellbore includes a well casing suspended within a borehole that extends between a surface and an underground reservoir of magma and a boiler casing housed within the well casing and extending between the surface and the underground reservoir of magma. The boiler casing has a first end submerged within the underground reservoir of magma and a terminal end opposite to the first end. The cased wellbore also includes a fluid conduit housed within the boiler casing and configured to deliver a liquid-phase fluid to the terminal end of the boiler casing. A temperature and a pressure at the terminal end of the boiler casing converts the liquid-phase fluid into a gas-phase fluid that travels through the boiler casing towards the surface. The cased wellbore also includes a well head connected to the first end of the boiler casing.

A multivessel system is provided for drilling an ultra-deep borehole into the Earth's lithosphere. The system includes a plurality of gate valves, a first pressure vessel configured with a first vessel elevator that engages and holds a train section as the first vessel elevator moves in the first pressure vessel along a portion of a length of a drill train channel; a second pressure vessel configured with a second vessel elevator that engages and holds the train section as the second vessel elevator moves in the second pressure vessel along another portion of the length of the drill train channel; a third pressure vessel configured with a smooth cylinder bore and a burn gas ejection piston configured to hold and connect the train section to the drill train; an input-output separator configured to segregate an exhaust waste gas up-flowing from the borehole from a gas being supplied into the borehole; and a drill train clamp configured to engage and hold a drill train in a borehole.

A well completion to convert a hydrocarbon production well into a geothermal well includes flow tubes to transport a working fluid through the well and a heat exchanger at a downhole location coupled to the flow tubes to exchange heat of the formation at the downhole location with the working fluid. A heat exchange fluid surrounds the heat exchanger at the downhole location to be heated by the formation at the downhole location. The heat exchanger heats the working fluid to a state in which the working fluid rises to the surface. At the surface, a power plant uses the heated working fluid to generate work. The working fluid is then cooled and returned to the downhole location to repeat the work generation cycle.

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 multivessel system is provided for installing a production train in an ultra-deep borehole into the Earth's lithosphere. The system includes a plurality of gate valves and a plurality of pressure vessels, including a first pressure vessel having a first vessel elevator configured to engage and hold a production train section as the first vessel elevator moves in the first pressure vessel along a portion of a length of a train channel, a second pressure vessel having a second vessel elevator configured to engage and hold the production train section as the second vessel elevator moves in the second pressure vessel along another portion of the length of the train channel, and a third pressure vessel, with all three pressure vessels being configured to be water cooled. The system includes a train clamp configured to engage and hold the production train in the borehole. Each of the first vessel elevator and the second vessel elevator includes a clamp configured to engage and hold the train section as the respective first vessel elevator or the second vessel elevator moves along the train channel.

Systems and methods for producing energy from a geothermal formation. A heat exchanger can be disposed within a well to absorb heat from a geothermal formation. The heat exchanger can be supported within the well using a high thermal conductivity material. The heat exchanger is connected to an organic Rankine cycle engine including a secondary heat exchanger and a turbine. The primary and secondary heat transfer fluids are chosen to maximize efficiency of the organic Rankine cycle.

The disclosure relates to a thermosiphon system operable to consistently maintain the permafrost and active frost layer in a frozen condition to adequately support buildings and other structures. During cooler seasons, the thermosiphon system uses a passive refrigeration cycle to efficiently maintain the frozen layers using the cold air. When the air temperature rises during the warmer months, the system transitions into an active refrigeration mode that uses a refrigeration system to minimize thawing or degradation of the permafrost and active frost layers.

A geothermal system includes an outer vessel having a sidewall that is in contact with surrounding ground material. A geothermal pile is disposed within an interior volume of the outer vessel, wherein a first heat conducting liquid at least partially fills a space between an inner surface of the sidewall of the outer vessel and an outer surface of the geothermal pile when in an installed condition. A conduit disposed within an interior space of the geothermal pile conducts a second heat conducting liquid along a flow path within the geothermal pile toward a bottom end thereof and then back to an outlet at a top end thereof. During operation, heat is transferred from the surrounding ground to the second heat conducting liquid via the first heat conducting liquid within the space between the inner surface of the sidewall of the outer vessel and the outer surface of the geothermal pile.