Method of and means for operating geothermal wells

Details Method of and means for operating geothermal wells Method of and means for operating geothermal wells

1990-05-17

1991-10-08

Suchfield, George A.

Wells

Processes

Heating, cooling or insulating

166 57, 166292, 166307, 606415, E21B 33138, E21B 4327

Patent

active

050545566

ABSTRACT:
A geothermal well is operated by continuously pumping spent geothermal fluid into the well and continuously adding concentrated acid to the spent geothermal fluid, such that the concentration of acid in the fluid is in the range of 0.5% to 5%, and occasionally to 10%. Over a period of time, the spend geothermal fluid flowing through the geological formations of the geothermal field carries the dilute acid into the formations for dissolving rock and increasing the permeability thereof. If it is desired to decrease the permeability of the formations, components of drilling mud or other suitable material, are continuously added to the spent geothermal fluid.

REFERENCES:
patent: 2761511 (1956-09-01), Billue
patent: 3111006 (1963-11-01), Caron
patent: 4059156 (1977-11-01), Berg
patent: 4093310 (1978-06-01), Terry
patent: 4476930 (1984-10-01), Watanabe
patent: 4500434 (1985-02-01), Jost et al.
patent: 4507925 (1985-04-01), Schaetzle et al.
patent: 4542625 (1985-09-01), Bronicki
patent: 4632601 (1986-12-01), Kuwada
patent: 4830766 (1989-05-01), Gallup et al.

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