A coaxial circulation power generation device includes a moving medium reservoir adapted to be located in a pit formed in a heat source zone, a moving medium supply unit for supplying the moving medium to the moving medium reservoir, and a power generation unit for generating electricity from a driving force of the moving medium flowing between a low-temperature zone above and the high-temperature zone below the moving medium reservoir. The moving medium reservoir has an outer pipe connected to the moving medium supply unit and an inner pipe for circulating the moving medium, and the outer pipe and the inner pipe installed in the moving medium reservoir includes rotor blades that rotate in opposite directions with respect to a flow direction of the moving medium.

A method is provided for forming a wellbore extending from a surface into an underground reservoir of magma. The method includes drilling a primary borehole from the surface into the underground reservoir of magma and drilling a secondary borehole extending from the primary borehole and further into the underground reservoir of magma.

A geothermal system includes a wellbore with a borehole extending from a surface into an underground reservoir of magma. A chamber is located within the borehole and extends at least partially into the underground reservoir of magma. An inlet conduit allows flow of heat transfer fluid from the surface and into the chamber. An outlet conduit allows flow of heated heat transfer fluid from the chamber toward the surface.

A geothermal system may include a partially cased wellbore. The partially cased wellbore includes a first borehole portion extending from a surface into an underground magma reservoir. The first borehole portion includes a casing extending from a first end. The partially cased wellbore includes a second borehole portion extending from the first end to a terminal end of the wellbore. The second borehole portion extends into the underground magma reservoir and a wall of the second borehole portion is hardened magma.

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.

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.

A method of operating a geothermal system includes steps of providing a molten salt down a wellbore extending from a surface and into an underground reservoir of magma, receiving heated molten salt from the wellbore, and providing the heated molten salt to a heat-driven process.

A geothermal power generation system comprising a geothermal water lift and a geothermal power generator is shown. The geothermal water lift comprises a well bore extending from the surface downwardly into the earth, a casing affixed inside to well bore, and a tubing extending downwardly through the casing creating an annulus area in the well bore between the casing and the tubing. Fluid is introduced into the annulus area from the surface and flows downwardly, gaining temperature due the temperature gradient with the surrounding earth, until it reaches an open end of the tubing down hole. The fluid reverses direction into the tubing and begins rising upward toward the surface. The pressure decreases on the fluid as it rises until it reaches critical vapor pressure and begins to boil increasing velocity of the stream. Power is generated at the surface through turbines operably connected to a power generator including through a fluid turbine that utilizes the momentum of the fluid/gas stream.

A geothermal power generation system comprising a geothermal water lift and a geothermal power generator is shown. The geothermal water lift comprises a well bore extending from the surface downwardly into the earth, a casing affixed inside to well bore, and a tubing extending downwardly through the casing creating an annulus area in the well bore between the casing and the tubing. Fluid is introduced into the annulus area from the surface and flows downwardly, gaining temperature due the temperature gradient with the surrounding earth, until it reaches an open end of the tubing down hole. The fluid reverses direction into the tubing and begins rising upward toward the surface. The pressure decreases on the fluid as it rises until it reaches critical vapor pressure and begins to boil increasing velocity of the stream. Power is generated at the surface through turbines operably connected to a power generator including through a fluid turbine that utilizes the momentum of the fluid/gas stream.

The invention relates to a geothermal exchanger comprising a casing containing a heat-transfer fluid with which it is in direct contact. The casing is flexible such as to be in direct contact with a wall of the borehole containing the exchanger under the effect of the pressure of the heat-transfer fluid.