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| Number | Title | Issue Date |
| 7422798 | Vapour turbine Vapour turbine operating with geothermal vapours containing corrosive agents or aggressive substances such as chlorides and/or sulfides in particular. The turbine comprises a series of stator blades and a series of rotor blades, each stator blade of the series of st... | 09/09/2008 |
| 7320221 | Method and apparatus for using geothermal energy for the production of power An apparatus and method for enhancing the flow of geothermal fluid from at least one injection well to at least one production well, which comprises a first horizontal geothermal well, which is used as the injection well, and into which water is injected; a second h... | 01/22/2008 |
| 7059131 | Method and system for exchanging earth energy between earthly bodies and an energy exchanger, especially to produce an electric current An energy exchanger (2) is connected to an earth energy exchanger (18) via a flow line (10) and a return flow line (14). The flow line (10) and the return flow line (14) are both provided with a regulatable stop valve (12... | 06/13/2006 |
| 6708494 | Device for utlilizing geothermal heat and method for operating the same An apparatus and a method for using geothermal energy include the use of at least a first conduit, through which a working substance is carried downward into the interior of the Earth, at least one second conduit, through which the working substance is carried upwar... | 03/23/2004 |
| 6668554 | Geothermal energy production with supercritical fluids There has been invented a method for producing geothermal energy using supercritical fluids for creation of the underground reservoir, production of the geothermal energy, and for heat transport. Underground reservoirs are created by pumping a supercritic... | 12/30/2003 |
| 5651251 | Geothermal energy means and procedure The water in a closed loop geothermal system is caused to flush the system by reverse flow of water in and through the system. This provides a "well-to-well" full reversal of the water flow, thus permitting the factor of a primary receiver well to not onl... | 07/29/1997 |
| 4576006 | Geothermal hot water transportation and utilization system Disclosed is a system for transporting geothermal hot water taken up at an underground bottom portion of a geothermal production well up to the ground surface, efficiently with a loss suppressed to minimum of the energy possessed by the geothermal hot wat... | 03/18/1986 |
| 4507925 | Method for and thermal energy injection withdrawal system for aquifers A process has been invented to inject and withdraw water from an aquifer for purposes of energy storage under some abnormal conditions. This transfer system is for thermal energy storage applications where the transfer water pressure is higher than the no... | 04/02/1985 |
| 4448022 | Downhole liquid trap for a geothermal pumping system In a geothermal energy conversion system having a boiler and a turbine driven pumping unit, a separator is disposed between the boiler and the turbine driven pump for separating entrained liquid droplets from the vaporized working fluid exhausted from the... | 05/15/1984 |
| 4426849 | Gravity head reheat method In a gravity head geothermal energy conversion system, downwardly flowing working fluid is supplied to a downwell turbine pump in heat transfer relationship to the upwardly flowing geothermal brine. The working fluid which is used to drive the downwell tu... | 01/24/1984 |
| 4407126 | Thermosyphon boiler for a geothermal pumping system In a geothermal energy conversion system having a boiler, a liquid trap, and a turbine driven pumping unit, a thermosyphon boiler is disposed between the liquid trap and the turbine driven pump. The thermosyphon boiler evaporates the liquid collected in t... | 10/04/1983 |
| 4388807 | Geothermal power extraction system with above surface heating of working fluid In a geothermal energy conversion system of the type having a down-hole turbine pump unit driven by a heated working fluid, a heat exchanger is disposed at the surface of the earth for heating the working fluid. The turbine pump unit pumps the geothermal ... | 06/21/1983 |
| 4380903 | Enthalpy restoration in geothermal energy processing system A geothermal deep well energy extraction system is provided of the general type in which solute-bearing hot water is pumped to the earth's surface from a relatively low temperature geothermal source by transferring thermal energy from the hot water to a w... | 04/26/1983 |
| 4342197 | Geothermal pump down-hole energy regeneration system Geothermal deep well energy extraction apparatus is provided of the general kind in which solute-bearing hot water is pumped to the earth's surface from a subterranean location by utilizing thermal energy extracted from the hot water for operating a turbi... | 08/03/1982 |
| 4328673 | Geothermal pump dual cycle system Geothermal deep well energy extraction apparatus is provided of the general kind in which solute-bearing hot water is pumped to the earth's surface from a subterranean location by utilizing thermal energy extracted from the hot water for operating a prima... | 05/11/1982 |
| 4325681 | Geothermal irrigation pump A deep well pumping apparatus utilizing a geothermal source of energy is disposed within or above a stratum having a cool irrigating fluid, and an associated heat exchange unit is disposed within a stratum having the geothermal source. An organic working ... | 04/20/1982 |
| 4181468 | Geothermal energy pump monitor and telemetric system The operation of a geothermal well power-generationsystem is monitored by sensor, communication, and performance monitoring equipment normally associated integrally with the operating power generation system. Sensors detect magnitudes of well water temper... | 01/01/1980 |
| 4142108 | Geothermal energy conversion system A geothermal energy recovery system of improved efficiency makes use of thermal energy stored in hot, solute-bearing well water as it is pumped upward to the earth's surface through an extended heat exchange element for continuously heating a downward flo... | 02/27/1979 |
| 4107987 | Geothermal well pump performance sensing system and monitor therefor The operating characteristics of deep well pumping equipment in a geothermal well power-generation system are observed by cooperating sensor and communication elements permanently associated with the geothermal well equipment itself. Bridge circuit sensor... | 08/22/1978 |
| 4077220 | Gravity head geothermal energy conversion system A geothermal energy recovery system of improved life duration makes use of thermal energy stored in hot, solute-bearing well water as it is pumped upward to the earth's surface through an extended heat exchange element for continuously heating a downward ... | 03/07/1978 |
| 4059959 | Geothermal energy processing system with improved heat rejection The improved geothermal energy extraction system abstracts thermal energy stored in hot solute-bearing well water to generate a super-heated fluid from an injected flow of a working fluid; the super-heated fluid is then used to operate a turbine-driven pu... | 11/29/1977 |
| 4050517 | Geothermal energy well casing seal and method of installation A geothermal energy transfer and utilization system makes use of thermal energy stored in hot solute-bearing well water to generate a thermal working fluid from an injected flow of clean fluid. The working fluid is then used for operating a turbine-driven... | 09/27/1977 |
| 4023136 | Borehole telemetry system A geothermal well power-generation system is monitored by sensors permanently associated with the operating power generation system. These sensors detect changes in well water temperature, water pressure below and above the pump, and pump rotating speed. ... | 05/10/1977 |
| 3988896 | Geothermal energy pump and monitor system The operation of a geothermal well power-generation system is monitored by sensor, communication, and performance monitoring equipment permanently associated with the operating power generation system. Sensors detect changes in well water temperature, in ... | 11/02/1976 |
| 3967448 | Geothermal energy well casing seal A geothermal energy transfer and utilization system makes use of thermal energy stored in hot solute-bearing well water to generate super-heated steam from an injected flow of clean water. The super-heated steam is then used for operating a turbine-driven... | 07/06/1976 |
| 3961866 | Geothermal energy system heat exchanger and control apparatus A geothermal energy transfer and utilization system extracts thermal energy stored in hot solute-bearing well water to generate super-heated steam from an injected flow of clean water; the super-heated steam is then used for driving a turbine-driven pump ... | 06/08/1976 |
| 3939659 | Geothermal energy system fluid filter and control apparatus A geothermal energy transfer and utilization system abstracts thermal energy stored in hot solute-bearing well water to generate super-heated steam from an injected flow of clean water; the super-heated steam is then used for operating a turbine-driven pu... | 02/24/1976 |
| 3938334 | Geothermal energy control system and method A geothermal energy transfer and utilization system makes use of thermal energy stored in hot solute-bearing well water to generate super-heated steam from an injected flow of clean water; the super-heated steam is then used for operating a turbine-driven... | 02/17/1976 |
