Wells – With below and above ground modification – Above ground actuating means for below ground device
Patent
1992-04-01
1994-02-08
Britts, Ramon S.
Wells
With below and above ground modification
Above ground actuating means for below ground device
166324, 285917, E21B 3310
Patent
active
052842053
ABSTRACT:
A metal to metal seal (10) is provided that comprises an annular seat (66), a seal member (90) having annular metal skirt (91) adapted to engage the annular seat (66), an undercut section behind the skirt (91), and an annular retainer member (78) disposed in the undercut section behind the skirt (91), the skirt (91) being adapted to deflect toward the retainer member (78) when pressured against the annular seat (66), the amount of deflection being limited by the angular distance between the skirt (91) and the retainer member (78). An annular stop member is provided (144) for optionally transferring excess bearing load around the skirt (91) and an adjustment member is provided (176) for selectively controlling the portion of the bearing load carried by the skirt (91) and to limit deflection of the skirt. Use of the subject metal to metal seal is (10) as a piston seal in surface controlled subsurface safety valves (38) employed in the oil and gas industry.
REFERENCES:
patent: 3885627 (1975-05-01), Berry et al.
patent: 4743033 (1988-05-01), Guess
patent: 4834183 (1989-05-01), Vinzant et al.
patent: 4945993 (1990-08-01), Dickson et al.
patent: 4979721 (1990-12-01), Gilbert
patent: 5183115 (1993-02-01), Gano
patent: 5183268 (1993-02-01), Wong et al.
Britts Ramon S.
Druce Tracy W.
Halliburton Company
Ross Monty L.
Schoeppel Roger J.
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