Subsurface well apparatus

Details Subsurface well apparatus Subsurface well apparatus

1975-05-23

1977-07-19

Leppink, James A.

Wells

Valves, closures or changeable restrictors

Fluid operated

E21B 4312

Patent

active

040362965

ABSTRACT:
A surface-controlled subsurface safety valve apparatus and method of utilizing the safety valve in through-the-flowline serviced wells. Both the valve frame and valve operator are provided with ball and socket universal joints to enable passage of the safety valve past restrictions in the flowline resulting from bends and curves in the flowline by flexing the safety valve in moving to and from the subsurface operating location.

REFERENCES:
patent: RE28131 (1974-08-01), Leutwyler
patent: 3126908 (1964-03-01), Dickens
patent: 3543793 (1970-12-01), Dollison
patent: 3703193 (1972-11-01), Raulins
patent: 3741249 (1973-06-01), Leutwyler
patent: 3762471 (1973-10-01), Mott
patent: 3868995 (1975-03-01), Crowe

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