Method and apparatus for a surface control system for: subsurfac

Details Method and apparatus for a surface control system for: subsurfac Method and apparatus for a surface control system for: subsurfac

1977-02-24

1978-04-04

Leppink, James A.

Wells

Valves, closures or changeable restrictors

166 53, 166 72, 166323, E21B 4300, E21B 3303

Patent

active

040821471

ABSTRACT:
Two embodiments of a surface controller system apparatus and their method for use with a surface controlled subsurface safety valve are disclosed. Both surface controller systems are responsive to an emergency shutdown signal for enabling closing of the subsurface safety valve when the well surface safety systems are shut-in. Once the subsurface Safety Valve has been shut-in up the system, the safety control system must be manually reset before the subsurface valve can be reopened.
Both safety control system provides an enclosed reservoir or accumulator for receiving the hydraulic control fluid when the subsurface valve closes and for containing well blow-outs through either one or both control fluid conduits operably connecting the controller system with the subsurface valve. The enclosed systems are also arranged that any internal leakage of the surface control system will operate to shut-in the well with the subsurface valve. Undesired pressure buildup, effecting possible operation of the subsurface valve in either of the normal or vent control lines also automatically operates to shut-in the subsurface safety valve.

REFERENCES:
patent: 2998070 (1961-08-01), Tamplen et al.
patent: 3078923 (1963-02-01), Tausch
patent: 3517688 (1970-06-01), Scholle
patent: 3531078 (1970-09-01), Hose et al.
patent: 3675720 (1972-07-01), Sizer
patent: 3696868 (1972-10-01), Taylor, Jr.
patent: 3870102 (1975-03-01), Mott

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