Wells – Above ground apparatus – Inner member anchor or seal with valve
Patent
1988-09-12
1989-09-26
Neuder, William P.
Wells
Above ground apparatus
Inner member anchor or seal with valve
166 97, 166321, E21B 3303
Patent
active
048693189
ABSTRACT:
An improved valve for controlling flow through a tubing hanger in a unit having a concentric tubing system and includes upwardly facing recesses or blind pockets in the hanger with a valve member in each of said pockets and having circumferential seals around its upper end and around its lower enlarged end, the valve members are biased upwardly in their pockets by springs and by annulus pressure which is transmitted to the lower end of the valve members through valve passages, the valve members each includes an upper projection or rod which is engaged by an annular actuator controlled responsive to a downwardly exerted spring force and by a pressure area differential which is exposed to annulus pressure and control pressure to urge the annular actuator downwardly which movement moves the valve member to its downward or open position. Control line pressure is provided to the actuator and to the exterior surface of the valve members below their upper seals so that the movement of the valve members can be controlled from remote locations.
REFERENCES:
patent: 3360048 (1967-12-01), Watkins
patent: 4125155 (1978-11-01), Block, Jr.
patent: 4333526 (1982-06-01), Watkins
patent: 4449583 (1984-05-01), Lawson
Cameron Iron Works USA Inc.
Neuder William P.
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