Geothermal well head assembly

Details Geothermal well head assembly Geothermal well head assembly

1980-04-21

1981-11-10

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 31, 277 64, 277112, 166 84, 166 85, 166 775, 166315, E16J 1518, E21B 2300

Patent

active

042993954

ABSTRACT:
A geothermal well head assembly that is removably mounted on the upper flanged end of a surface string of casing that is submitted in the upper portion of a bore hole that extends to the heated zone. A second string of casing is concentrically disposed in the first casing and extends to the heated zone, which second string of casing tends to expand and contract longitudinally to the first string. A rigid ring is disposed in the annulus space between the first and second strings of casing adjacent the ground surface and first and second resilient seals in pressure contact with the interior surface of the first casing and exterior surface of the second casing. Means are provided for periodically and independently adjusting the compression on these seals from the exterior of the assembly without shutting down the geothermal well, which shut down is undesirable as possibly having an adverse effect on future production from the well.

REFERENCES:
patent: 1627945 (1927-05-01), Wigle
patent: 1867321 (1932-07-01), McEvoy
patent: 2069443 (1937-02-01), Hill
patent: 2219064 (1940-10-01), Boyer et al.
patent: 2292543 (1942-08-01), Patterson
patent: 2954742 (1960-10-01), Williams
patent: 3478826 (1969-11-01), Barnes
patent: 4157186 (1979-06-01), Murray et al.

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