Wells – Processes – With indicating – testing – measuring or locating
Patent
1981-12-07
1983-10-04
Novosad, Stephen J.
Wells
Processes
With indicating, testing, measuring or locating
166305R, 166311, E21B 33068, E21B 4706
Patent
active
044073666
ABSTRACT:
A method for capping an idle geothermal steam well so as to prevent hydrogen sulfide emissions and well damage due to steam condensation includes replacing geothermal steam in a well borehole with gas, perferably an inert gas such as nitrogen, and sealing the well at the wellhead. Thereafter additional quantities of the gas are bled into the well borehole at a rate that substantially prevents steam condensation in the borehole. The method includes purging the well bore with air sufficiently to assure all steam is swept out of the well before the gas is introduced.
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Hatter Marjorie M.
Lieffers William C.
Floyd Gerald L.
Novosad Stephen J.
Sandford Dean
Suchfield George A.
Union Oil Company of California
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