WO2005095795A1 - Systeme d'alimentation electrique - Google Patents

Systeme d'alimentation electrique Download PDF

Info

Publication number
WO2005095795A1
WO2005095795A1 PCT/GB2005/001230 GB2005001230W WO2005095795A1 WO 2005095795 A1 WO2005095795 A1 WO 2005095795A1 GB 2005001230 W GB2005001230 W GB 2005001230W WO 2005095795 A1 WO2005095795 A1 WO 2005095795A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure chamber
working fluid
expander
heat
electrical
Prior art date
Application number
PCT/GB2005/001230
Other languages
English (en)
Inventor
Graham Dadd
Original Assignee
Qinetiq Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qinetiq Limited filed Critical Qinetiq Limited
Publication of WO2005095795A1 publication Critical patent/WO2005095795A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/04—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using pressure differences or thermal differences occurring in nature
    • F03G7/05—Ocean thermal energy conversion, i.e. OTEC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C1/00—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid
    • F02C1/002—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid using an auxiliary fluid
    • F02C1/005—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid using an auxiliary fluid being recirculated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C1/00—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid
    • F02C1/04—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid the working fluid being heated indirectly
    • F02C1/05—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid the working fluid being heated indirectly characterised by the type or source of heat, e.g. using nuclear or solar energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient

Definitions

  • This invention relates to a system for the supply of electrical power.
  • it relates to an electrical power supply system designed for remote operation such as may be required in undersea operations, or in other inhospitable environments.
  • Oil and gas reserves are frequently found in inhospitable locations such as below deep seas.
  • the infrastructure used to extract the oil or gas requires power under the sea to actuate valves and other assemblies, such as chemical injector systems, associated with the extraction process.
  • This power is supplied from a remote surface site - generally an oil rig - and fed under the sea down to where it is needed using a specially designed umbilical conduit incorporating hydraulic conduits, liquid chemical conduits, electrical power and signal transmission cables.
  • Such cabling can often be several kilometres in length, and is required to be strong and suitably shielded against the harsh environment, which results in a cable network that is heavy, vulnerable to damage and expensive.
  • an electrical power supply system comprising a power generation means characterised in that the power generation means is a sealed, waterproof unit, and wherein the power generation means comprises: a higher pressure chamber and a lower pressure chamber, with the higher pressure chamber incorporating a first heat transfer means for transferring heat from material flowing from an underground thermal source to a working fluid, and the lower pressure chamber incorporating a second heat transfer means for transferring heat from the working fluid to a heatsink, wherein a mechanical expander is arranged between the higher pressure chamber and the lower pressure chamber, through which the working fluid may pass, and the mechanical expander is rotationally coupled to an electrical generator such that passage of working fluid through the expander causes an output coupling of the expander to rotate.
  • the present invention allows the power supply to originate much closer to the point of use, allowing for less cabling to be used. Such an approach will therefore be cheaper, and less prone to damage and interruption of production operations.
  • the sealed nature of the power supply means provides for increased reliability, which is an important criteria in this field as discussed above.
  • Preferably all mechanical rotatable shafts are contained within the sealed waterproof unit, thus increasing reliability, as associated seals will also not be required.
  • underground thermal source and derivatives shall be taken to include sources that are under the sea bed.
  • valves and actuators used in oil and gas extraction are currently hydraulically operated, the present invention will allow these to be replaced with equivalent devices that are operated electrically.
  • the chemicals, such as glycol, that are often required in the extraction process may be supplied from a holding tank positioned close to the point of use. In this way the need for a long and expensive umbilical from a remote station can be much reduced.
  • the electrical power supply requires a source of energy, and this is provided by the heat energy extracted from a heat source.
  • the power supply means is sited in thermal communication with an underground thermal source, preferably via an outflow pipe from the underground source, where typically the temperature of such outflow is between 70°C and 120°C on extraction.
  • the underground thermal source will preferably be an oil or gas well.
  • the underground thermal source may alternatively be a natural hot vent as occurs in some parts of the ocean floor. In this case the power supply means will be sited in thermal communication with the outflow from the vent.
  • the power supply means requires a heat sink, to which the power supply means can dump unwanted heat energy.
  • the heat sink will typically be seawater, or it may be provided by other means such as forced fluid cooling, or any other suitable means as may be available in the environment in which the system is situated.
  • the working fluid is arranged to be heated by the heat source to provide a high pressure vapour.
  • a good thermal interface between the underground heat source and the working fluid is therefore preferred, and this may be achieved by use of a heat transfer means, or heat exchanger, built in to the power generation means.
  • the heat transfer means is arranged to have a surface in thermal communication with the heat source, and heat transferred through the surface is used to heat the working fluid.
  • the external boundary of this heat exchanger is preferably insulated to minimise loss of heat in the transfer to the working fluid.
  • the working fluid is a volatile working fluid.
  • the heat source is preferably an oil or gas outflow pipe, with the heat exchanger arranged to be coupled to the outflow pipe so as to allow fluid flowing therein to pass to a heat exchange thermal interface.
  • the coupling preferably incorporates a diversion valve preventing fluid flowing in the outflow pipe from bypassing the heat exchanger.
  • the diversion valve is preferably arranged such that, in an open position, it allows the passage of maintenance equipment through the outflow
  • the inclusion within the electrical power supply system of a higher pressure chamber and a lower pressure chamber conveniently allows a difference in pressure between the two chambers to be used to drive the working fluid vapour through an expander, to generate mechanical energy from the pressure difference.
  • the divider is preferably insulated to minimise heat transfer between the high and low pressure regions, which will be at different temperatures when operating.
  • the expander is preferably a screw expander, this type of device having good low speed torque characteristics, rugged and reliable construction and power output per mass flow that is reasonably linear.
  • any suitable expander may be used, such as, but not limited to, an axial turbine, a radial inflow turbine, a scroll expander, a vane expander or a reciprocating expander.
  • the vapour exhaust from the expander is converted to liquid by transfer of heat to the heat sink by means of a condenser.
  • This serves to maintain a low pressure downstream of the expander and thus promotes the delivery of mechanical work from the expander.
  • the condenser will operate by natural convection to eliminate any parasitic loss associated with other means such as forced convection.
  • the liquid working fluid may be returned to the high-pressure part of the power system by means of a feed pump, driven from the mechanical or electrical output of the expander.
  • the mechanical energy generated by the expander may be used to drive an electrical generation means such as a generator, dynamo, alternator, or any other suitable electrical generation system.
  • the electrical generator is preferably a brushless generator, such as a switched reluctance, or permanent magnet generator, thus eliminating a source of wear, and hence unreliability from the system.
  • the electrical output from the generator may be processed in a standard manner, such as by the use of solid state electronic components, to provide any required voltage or frequency regulation.
  • the electrical power may be regulated by means of controlling the flow of the working fluid vapour into the expander, by means of a throttle valve or similar system.
  • a pressure regulating bypass valve may be positioned between the high pressure chamber and the low pressure chamber. The throttle valve or bypass valve may be controlled by a feedback signal from the electrical generation means.
  • the generator and any power conditioning electronics are preferably positioned within the lower pressure chamber, therefore benefiting from the cooling operation of the condenser. By this means the reliability and working life of the system may therefore be improved by such means.
  • the working fluid is preferably adapted to incorporate a lubricant.
  • the working fluid is then able to provide lubrication and sealing for the expander, leading to a simplified expander design, and will also lubricate any other moving parts in contact with the working fluid.
  • the expander may have its own source of lubrication.
  • the electrical energy generated by the generator may be fed out of the power supply means through a static seal or suitable connector and delivered using cabling to wherever it is required.
  • a preferred cycle of operation of this embodiment is the Rankine cycle, as this is mechanically relatively straightforward, and hence reliable, and efficient enough for the application.
  • Embodiments incorporating other cycles, such as the Trilateral Flash Cycle or the Kalina Cycle may also be employed if they are capable of being used to convert the thermal energy to electrical energy.
  • Electrical energy storage means may be incorporated into the supply system to provide a temporary source of electricity for purposes such as starting the power supply system from cold, or shutting down the system.
  • a storage means preferably comprises one or more batteries.
  • the storage means is preferably located in the low pressure chamber.
  • a subsurface power source comprising a power generation means characterised in that the power generation means is a sealed, waterproof unit, and wherein the power generation means comprises: a higher pressure chamber and a ower pressure chamber, with the higher pressure chamber incorporating a first heat transfer means for transferring heat from material flowing from an underground thermal source to a working fluid, and the lower pressure chamber incorporating a second heat transfer means for transferring heat from the working fluid to a heatsink, wherein a mechanical expander is arranged between the higher pressure chamber and the lower pressure chamber, through which the working fluid may pass, and the mechanical expander is rotationally coupled to an electrical generator such that passage of working fluid through the expander causes an output coupling of the expander to rotate.
  • Such a sub-surface power source may be used to provide electrical power directly to devices associated with the extraction of fluid from an underwater well.
  • the power source would typically be positioned in the vicinity of the devices to be powered, such that a long umbilical cable is not required.
  • a method of powering a subsurface apparatus comprising the steps of using a first heat exchanger to extract heat energy from an outflow from an underground thermal source by means of heating a working fluid to create a pressurised vapour; converting the energy in the pressurised vapour to mechanical rotational energy by means of allowing the vapour to pass through an expander; generating electrical energy by means of driving a generator using mechanical output from the expander; condensing the working fluid by means of a second heat exchanger; supplying the generated electricity to the subsurface apparatus.
  • the method may be used for powering valves and actuators and related devices that are typically mounted in undersea outflow pipes associated with the extraction of fluid from a well.
  • the method would typically be employed underwater in the vicinity of the devices such that a long umbilical cable is not required.
  • a subsurface device having connected thereto a subsurface power source, the subsurface power source comprising a power generation means characterised in that the power generation means is a sealed, waterproof unit, and wherein the power generation means comprises: a higher pressure chamber and a lower pressure chamber, with the higher pressure chamber incorporating a first heat transfer means for transferring heat from material flowing from an underground thermal source to a working fluid, and the lower pressure chamber incorporating a second heat transfer means for transferring heat from the working fluid to a heatsink, ' wherein a mechanical expander is arranged between the higher pressure chamber and the lower pressure chamber, through which the working fluid may pass, and the mechanical expander is rotationally coupled to an electrical generator such that passage of working fluid through the expander causes an output coupling of the expander to rotate.
  • Such a device would typically be a valve or actuator associated with the extraction of fluid from an undersea well.
  • Figure 1 diagrammatically illustrates a prior art means for supplying electrical energy to undersea systems
  • Figure 2 diagrammatically illustrates the current invention, operating from an underground heat source
  • Figure 3 diagrammatically illustrates a first embodiment of the current invention.
  • Figure 4 diagrammatically illustrates an expander suitable for use with the first embodiment of the current invention.
  • Figure 5 diagrammatically illustrates a means for heating a working fluid using heat from an underground thermal source.
  • Figure 1 shows an oil platform 1 designed for extracting oil and gas from an undersea oil reserve, using pipework 2, connected to a subsea manifold 200 and well heads 201 on the sea bed 4.
  • the pipework 2 has attached various actuator valves 3 associated with the oil recovery process, that may be operated using electrical or hydraulic power.
  • the electrical power and hydraulic fluid is supplied via cable 5 that originates from a power supply plant 6 in the platform 1.
  • This cable 5 clearly has to be well armoured against its inhospitable environment, and also has to be long enough to reach from the rig to wherever power is required.
  • the cable 5 is also often used to carry chemicals used in the extraction process, such as glycol. Note that the diagram is not shown to scale, and the pipework 2 and cable 5 may in practice extend for many tens of miles.
  • FIG. 2 shows the current invention operating from an undersea location.
  • a power generation system 7 is shown positioned on the seabed 8 and in thermal contact with an outflow pipeline 9.
  • the pipeline 9 carries hot fluid extracted from the oil reservoir.
  • the naturally occurring pressure of the fluid is generally sufficient to enable it to flow along the pipeline 9, and the fluid is typically at an initial temperature of 70°C to 120°C, and the heat energy contained therein is used as the source of energy in the power generation system.
  • Electrical cable 10 provides an output for the electrical energy, with the cabling 10 allowing the energy to be taken to where it is locally required.
  • the cabling 10 can be much shorter, and hence cheaper and more reliable.
  • FIG. 3 shows in detail a first embodiment of a power supply system according to the current invention.
  • a power supply system 11 is shown that comprises a higher pressure chamber 12 and a lower pressure chamber 13.
  • the higher pressure chamber 12 has a thermal insulation layer 14 that thermally insulates it from the lower pressure chamber 13, and also along the lower portion of the sidewalls 15, 15'.
  • a pathway from the higher pressure chamber 12 to the lower pressure 13 is provided via an expander 16.
  • the expander 16 provides an output in the form of a rotating shaft, and this shaft is connected to electrical generator 17, the electrical output of which is fed into electrical regulation means 18 and then to the output connector 19.
  • the connector 19 can be replaced with a seal that allows a cable to pass from the regulation means 18 through the sidewall 15' and on to where the electrical power is needed.
  • the walls of the lower pressure chamber comprising the upper portion of the sidewalls 15, 15' and roof 22 are fitted with cooling pipes 101 that provide an efficient thermal contact between the chamber 13 and the seawater, effectively making the chamber 13 a condenser for cooling the working fluid.
  • cooling pipes 101 that provide an efficient thermal contact between the chamber 13 and the seawater, effectively making the chamber 13 a condenser for cooling the working fluid.
  • many more pipes 101 would be used than that shown in the Figure.
  • the system of Figure 3 operates as follows.
  • the higher pressure chamber is mounted in thermal contact with an output from an underground thermal source, as shown in relation to Figure 2.
  • This thermal source typically an oil or gas output pipe - runs at around 70 - 120°C, and so heats up a working fluid 20 present in the higher pressure chamber.
  • the temperatures present in the higher pressure chamber 12 create a pressurised vapour of working fluid, this pressurised vapour having only a single exit point via the expander 16.
  • the expander 16 in the present embodiment is a screw expander, which comprises two meshing and contra-rotating rotors. Vapour pressure applied to the expander, accompanied by fluid flow and subsequent expansion, turns the rotors and so generates rotational mechanical energy.
  • the rotating shaft 21 from the expander turns a rotor in the electrical generator 17 to generate electrical energy, in a known manner.
  • This electrical energy is then regulated in a known manner according to the requirements of the devices to be driven by the power generation system 11.
  • the requirements of the primary application of the invention being the powering of wellhead equipment such as valves and control devices means that the regulation system is designed to provide a 24V DC output. However, this can clearly be varied according to the needs of each application.
  • Electrical generator 17 is a brushless generator such as a switched reluctance or permanent magnet generator, in which the electrical power is generated in the static field winding.
  • a generator of this form will generally be more reliable than one in which brushes or slip-rings are used to transfer current from a moving armature.
  • the electrical generator is shown housed within the condenser, and so will be cooled by the condensate pervading this space. Some condensate may evaporate in cooling the generator and regulating electronics, migrate to the cooling surfaces and be re-condensed.
  • the electrical generator 17 may alternatively be housed in another convenient location, provided it may be suitably mechanically coupled to the expander 16.
  • Vapour that exits the expander 16 after passing through from the higher pressure chamber 12 is cooled by being condensed in a condenser that comprises a set of tubes 101 in good thermal contact with the surrounding seawater.
  • the condensate then runs by force of gravity to reservoir 23.
  • a variable capacity pump 24 driven by the expander 16 or by a separate electrical drive (not shown) pumps the condensate back to the higher pressure chamber 12 to be reheated and so continue the cycle.
  • a one way valve 25 in the pump system prevents fluid flow back through the pump should the pump be temporarily stopped.
  • valve 100 when the system has cooled down and pressures in chambers 13 and 12 have substantially equalised.
  • the valve 100 may be operable remotely by electrical means, or may be thermostatically operated. This will operate as follows. If the temperature within the higher pressure chamber drops below some predetermined temperature lower than the lowest working temperature of the chamber 12 then the valve 100 opens, and allows working fluid to flow by means of gravity to the higher pressure chamber. This will of course equalise the pressure in the two chambers 12, 13, but this is of no significance as the system is being shut down. On restarting the system by application of heat into the working fluid 20, the temperature of the chamber 13 will rise to a temperature above the threshold temperature of the valve 100. This will then close the valve, allowing a pressure differential to build up and so start the electrical generation process as described above.
  • valve 100 may be operated by electromechanical means.
  • FIG. 4 shows in more detail an expander suitable for use with the first embodiment of the current invention.
  • the expander 26 has two screws 27, 28 each with a thread designed to mesh with the thread of the opposing screw.
  • the screws are mounted in a housing 29 shown in sectional view.
  • the housing 29 has two ports, an inlet port 30 positioned in a wall of the housing 29 and an outlet port 31 , shown dotted as it is positioned in an opposing wall.
  • Screw 28 has drive shafts 32 that may be connected to an electrical generator and a pump as required.
  • FIG. 5 shows an embodiment of a heat exchanger for heating the working fluid using an external source of hot fluid, and a means for connecting the heat exchanger to the heat source.
  • Main pipe 102 is an outflow pipe carrying hot fluid from an oil or gas reserve.
  • a diversion valve 103 typically a ball valve, is mounted into the pipe 102 to selectively prevent the flow of fluid through the pipe 102.
  • Take-off pipe 104 is attached to the main pipe 102, which then feeds the radiator pipe 105 mounted within heat exchanger 106. Radiator pipe 105 then exits the heat exchanger 106 and becomes a return pipe 107 that feeds back into the main supply pipe 102.
  • Non return valves 108 mounted in the take-off pipe 104 and return pipe 105 are arranged to open in a self acting manner due to the pressures present in the pipe 102 when diversion valve 103 is closed.
  • Surrounding the radiator pipe 105 is a mass of working fluid that enters the heat exchanger through port 109 and exits through port 110.
  • a mechanical stirring device (not shown) may be used to move the working fluid around within the heat exchanger to improve the heat transfer.
  • the diversion valve 103 When the diversion valve 103 is in the "open” position, then the hot fluid from the well is able to flow straight through the pipe, bypassing the heat exchanger.
  • the ball valve is such that, when it is in the open position, it presents no significant constriction on the internal diameter of the pipe 102, and so allows standard robotic "pigs" to be used inside the pipe 102 for maintenance purposes.
  • the ball valve 103 When the ball valve 103 is closed the fluid is forced through the take-off pipe 104, through the radiator pipe 105 and back to the main pipe 102 via the return pipe 107.
  • Surrounding the radiator pipe in the heat exchanger Surrounding the radiator pipe in the heat exchanger is a volume of working fluid that is heated by the fluid flowing through the radiator pipe. This converts the heated working fluid to a vapour which is then utilised as described above to generate electricity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Oceanography (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Sustainable Energy (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

La présente invention concerne un système d'alimentation électrique qui peut faire l'objet d'une utilisation sous-marine et comprend un système de production d'énergie conçu pour extraire de l'énergie thermique du flux sortant, par exemple, d'un puits sous-marin, et utiliser cette énergie thermique pour chauffer un fluide actif dans une chambre haute pression. Un dispositif d'expansion mécanique disposé entre ladite chambre haute pression et une chambre basse pression, est conçu pour être entraîné par le fluide actif lorsque celui-ci passe dans la chambre basse pression, le fluide étant condensé avant d'être renvoyé par pompage à la chambre haute pression. Un générateur électrique connecté au dispositif d'expansion, produit un signal électrique qui peut être conditionné avant d'être fourni à un point à alimenter. L'invention convient en particulier pour entraîner des vannes et actionneurs sous-marins associés à l'extraction de fluides de puits sous-marins, et peut permettre de réduire sensiblement la nécessité d'utilisation de liaisons ombilicales entre un site de commande éloigné et un point d'extraction.
PCT/GB2005/001230 2004-03-31 2005-03-29 Systeme d'alimentation electrique WO2005095795A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0407265.8A GB0407265D0 (en) 2004-03-31 2004-03-31 Power supply system
GB0407265.8 2004-03-31

Publications (1)

Publication Number Publication Date
WO2005095795A1 true WO2005095795A1 (fr) 2005-10-13

Family

ID=32247580

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2005/001230 WO2005095795A1 (fr) 2004-03-31 2005-03-29 Systeme d'alimentation electrique

Country Status (2)

Country Link
GB (1) GB0407265D0 (fr)
WO (1) WO2005095795A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2958303A1 (fr) * 2010-03-30 2011-10-07 Dcns Installation offshore de production d'energie electrique
US8375716B2 (en) 2007-12-21 2013-02-19 United Technologies Corporation Operating a sub-sea organic Rankine cycle (ORC) system using individual pressure vessels
WO2017031083A1 (fr) * 2015-08-18 2017-02-23 Geotek Energy, Llc Système d'alimentation à hydrocarbures

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4112687A (en) * 1975-09-16 1978-09-12 William Paul Dixon Power source for subsea oil wells
US4200807A (en) * 1977-09-15 1980-04-29 Humiston Gerald F Method of electrical closed heat pump system for producing electrical power
US4712380A (en) * 1984-01-25 1987-12-15 Solmecs Corporation N.V. Utilization of thermal energy
WO2003081038A1 (fr) * 2002-03-21 2003-10-02 Hunt Robert D Production d'energie electrique et/ou de gaz liquefie a partir de l'energie cinetique et/ou thermique de fluides sous pression

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4112687A (en) * 1975-09-16 1978-09-12 William Paul Dixon Power source for subsea oil wells
US4200807A (en) * 1977-09-15 1980-04-29 Humiston Gerald F Method of electrical closed heat pump system for producing electrical power
US4712380A (en) * 1984-01-25 1987-12-15 Solmecs Corporation N.V. Utilization of thermal energy
WO2003081038A1 (fr) * 2002-03-21 2003-10-02 Hunt Robert D Production d'energie electrique et/ou de gaz liquefie a partir de l'energie cinetique et/ou thermique de fluides sous pression

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8375716B2 (en) 2007-12-21 2013-02-19 United Technologies Corporation Operating a sub-sea organic Rankine cycle (ORC) system using individual pressure vessels
FR2958303A1 (fr) * 2010-03-30 2011-10-07 Dcns Installation offshore de production d'energie electrique
WO2011124820A3 (fr) * 2010-03-30 2012-08-30 Dcns Installation offshore de production d'énergie électrique
US8955450B2 (en) 2010-03-30 2015-02-17 Dcns Offshore installation for producing electrical energy
WO2017031083A1 (fr) * 2015-08-18 2017-02-23 Geotek Energy, Llc Système d'alimentation à hydrocarbures

Also Published As

Publication number Publication date
GB0407265D0 (en) 2004-05-05

Similar Documents

Publication Publication Date Title
US4112687A (en) Power source for subsea oil wells
EP3625433B1 (fr) Pompe submersible entraînée à la vapeur d'eau
CA2291188C (fr) Systeme de pompage sous-marin et procede s'y rapportant
TW201923225A (zh) 利用自地球內部之熱產生電力之系統及方法
US6259165B1 (en) Power generating device and method
US3824793A (en) Geothermal energy system and method
RU2686971C2 (ru) Оптимизированное охлаждение электродвигателя при насосно-компрессорной добыче
NO319600B1 (no) Undervannspumpesystem og fremgangsmate til pumping av fluid fra en bronn
WO2008147219A2 (fr) Dispositif de refroidissement sous-marin
SG188057A1 (en) Rotors
US4342197A (en) Geothermal pump down-hole energy regeneration system
WO2005095795A1 (fr) Systeme d'alimentation electrique
GB2549558A (en) System and method for converting heat in a wellstream fluid to work
GB2573121A (en) Injecting fluid into a hydrocarbon production line or processing system
US20140174756A1 (en) Artificial lift method for low pressure sagd wells
NO20141416A1 (no) Fremgangsmåte og system for regulering av fluid
US12085095B2 (en) Wellhead pressure reduction and power generating assembly
EP2246523B1 (fr) Appareil de refroidissement pour outil d'extraction
US20150139822A1 (en) Cooling Devices And Methods For Use With Electric Submersible Pumps
AU2022219961A1 (en) A geothermal pumping station
KR101596485B1 (ko) 유분리기를 구비한 가정용 열병합 발전시스템
KR101596486B1 (ko) 순환펌프 보호 기능을 구비한 가정용 열병합 발전시스템
US12110876B1 (en) Geothermal power systems and methods for subsea systems
US12098710B1 (en) Geothermal power systems and methods for subsea systems
NO20180570A1 (en) Injecting fluid into a hydrocarbon production line or processing system

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Country of ref document: DE

122 Ep: pct application non-entry in european phase