Subsurface safety valve

Details Subsurface safety valve Subsurface safety valve

1983-09-12

1985-07-09

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Fluid operated

1661175, 166324, E21B 3410, E21B 2303

Patent

active

045276315

ABSTRACT:
There are disclosed two embodiments of a subsurface safety valve having operating means which is responsive to the supply of control fluid from a remote source for holding a closure member in open position and which is retrievable separately from the closure member, so that with the bore of the mandrel above and below the closure member fluidly disconnected, the closure member automatically closes so as to close in the well when the operating means is so retrieved.

REFERENCES:
patent: 3078923 (1963-02-01), Tausch
patent: 3777813 (1973-12-01), Dendy
patent: 4325431 (1982-04-01), Akkerman

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