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US 2025/0027686 A1Published application
Mitigating fluid loss or inflow in a closed-loop geothermal system
AssigneeEavor Technologies Inc.
InventorsMichael Holmes, Matthew Toews
Life of this patent
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Abstract
A method includes circulating a heat transfer working fluid in a closed loop between a geothermal well residing in a subterranean zone and at least one of a heat exchanger or a turbine. The well is substantially sealed to limit fluid loss of the working fluid into the subterranean zone. While circulating the working fluid, at least one of a viscosity of the working fluid or a pressure differential between the working fluid and the subterranean zone is controlled in relation to a flow of fluid between the subterranean zone and the well.
Claims21
A method, comprising:
- circulating a heat transfer working fluid in a closed loop between a geothermal well residing in a subterranean zone and at least one of a heat exchanger or a turbine, the well substantially sealed to limit fluid loss of the working fluid into the subterranean zone;
- and
- while circulating the working fluid, controlling, in relation to a flow of fluid between the subterranean zone and the well, at least one of a viscosity of the working fluid or a pressure differential between the working fluid and the subterranean zone.
A method comprising:
- selecting a working fluid to exhibit a viscosity to control a loss of the working fluid into a subterranean zone, said loss occurring while the working fluid is circulated in a closed loop between a geothermal well residing in the subterranean zone and at least one of a heat exchanger or a turbine;
- and
- extracting, with the heat exchanger and while the working fluid is circulating in the closed loop, heat from the working fluid.
Dependencies are inferred from the claim text.