Wells – Processes – Distinct – separate injection and producing wells
Patent
1993-11-29
1994-12-06
Buiz, Michael Powell
Wells
Processes
Distinct, separate injection and producing wells
166369, E21B 4300
Patent
active
053701828
ABSTRACT:
The Thermal Extraction System and Method utilizes a geothermal heat source to provide thermal energy at the surface by drilling a bore hole into the geothermal heat source and equipping the bore hole with a casing and multiple tubing strings. A cavern is formed in the geothermal heat source, such as a brine cavern. One of the tubing strings is a production tubing string used to produce hot brine at the surface and has a low thermal conductivity fluid surrounding the production tubing string which may be adjusted to maintain an interface with brine from the cavern at varying levels around the production tubing string and thereby provides temperature regulation of the brine. This invention contemplates the production of brine at the surface which may be used in heat transfer applications or processed as feed stock for salt production with unsaturated brine returned to the brine cavern where it becomes saturated. The system and method may be used with an immiscible heat exchange fluid provided to absorb heat in the cavern from the mineral deposit and circulated to the surface through a heat exchanger and returned to the cavern.
REFERENCES:
patent: 4418752 (1983-12-01), Boyer et al.
patent: 4456068 (1984-06-01), Burrill, Jr. et al.
patent: 4460044 (1984-07-01), Porter
patent: 5005644 (1991-04-01), Wall et al.
patent: 5145003 (1992-09-01), Duerksen
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