Wells – Above ground apparatus – Inner member anchor or seal with valve
Patent
1988-03-21
1989-05-02
Kisliuk, Bruce M.
Wells
Above ground apparatus
Inner member anchor or seal with valve
137523, 166 97, 166325, 251 82, E21B 3402
Patent
active
048259454
ABSTRACT:
An improved wellhead valve includes a tubular body with a central passage therethrough and with a downwardly facing valve seat surrounding a portion of said passage, a cylindrical sealing surface above said valve seat, internal threads above said sealing surface and external threads, a valve member positioned within said passage below said valve seat and biased toward engagement with said valve seat, a plug having external threads for engagement with the internal threads of said body and having a sealing means for sealing against said cylindrical sealing surface and a projection extending downwardly from said sealing means, said plug when positioned within said central passage with its sealing means engaging said sealing surface closing flow through said body and said plug being movable downwardly so that its sealing means is below said sealing surface and its projection engages said valve member to move it out of engagement with the valve seat so that flow through said central passage is open and further rotation of said plug provides retrieval of the valve body from within the wellhead housing.
REFERENCES:
patent: 1082232 (1913-12-01), Nielsen
patent: 2919709 (1960-01-01), Schwegman
patent: 2939534 (1960-06-01), Allen
patent: 2958336 (1960-11-01), Yancey
patent: 3250331 (1966-05-01), Boyle
patent: 3574314 (1971-04-01), Quercia
patent: 3920042 (1975-11-01), Blatt
patent: 3954138 (1976-05-01), Miffre
patent: 4058162 (1977-11-01), Smith
patent: 4287912 (1981-09-01), Hewett
patent: 4403628 (1983-09-01), Nijjar
1978-1979 Composite Catalog of Oil Field Equipment and Services, pp. 1366, 1367.
1982-1983 Composite Catalog of Oil Field Equipment and Services, pp. 1712, 1713.
Cameron Iron Works USA Inc.
Kisliuk Bruce M.
LandOfFree
Wellhead valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wellhead valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wellhead valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-578751