Subsurface safety valve

Details Subsurface safety valve Subsurface safety valve

1978-03-09

1979-11-06

Pate, III, William

Wells

Valves, closures or changeable restrictors

Fluid operated

166332, 251 28, 251 62, E21B 4312

Patent

active

041732561

ABSTRACT:
Disclosed is a surface controlled subsurface safety valve for deep well service. Communication of control fluid to the subsurface safety valve is controlled at a subsurface location in close proximity to the valve. Responsiveness of the subsurface safety valve to decreases in control pressure is thereby increased and the valve's closure speed is also increased. This abstract of the disclosure is neither intended to define the scope of the invention, which, of course, is measured by the claims, nor is it intended to limit the invention in any way.

REFERENCES:
patent: 3292706 (1966-12-01), Grimmer et al.
patent: 3675718 (1972-07-01), Kanady
patent: 3703193 (1972-11-01), Raulins
patent: 3799258 (1974-03-01), Tausch
patent: 3965919 (1976-06-01), McGarvey et al.
patent: 4069871 (1978-01-01), Page, Jr.

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