Wells – Valves – closures or changeable restrictors – Fluid operated
Patent
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.
Otis Engineering Corporation
Pate, III William
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