Subsurface well apparatus having improved operator means and met

Details Subsurface well apparatus having improved operator means and met Subsurface well apparatus having improved operator means and met

1975-05-23

1977-05-31

Leppink, James A.

Wells

Valves, closures or changeable restrictors

166322, 251 62, E21B 4312

Patent

active

040263622

ABSTRACT:
A surface-controlled wire-line retrieval subsurface safety valve apparatus and method of utilizing the safety valve having a rotatable ball closure element and a movable operator mechanism that controls the operating stroke when the valve is operably installed as well as moving the ball and seat into sealing engagement.

REFERENCES:
patent: 3744564 (1973-07-01), Mott
patent: 3762471 (1973-10-01), Mott
patent: 3763933 (1973-10-01), Mott
patent: 3854502 (1974-12-01), Mott
patent: 3856083 (1974-12-01), Mott
patent: 3858650 (1975-01-01), Mott
patent: 3901321 (1975-08-01), Mott

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