Well tool

Details Well tool Well tool

1975-04-09

1976-10-26

Leppink, James A.

Wells

Screens

Porous material

137458, 251 58, F16K 3163, E21B 4312

Patent

active

039878490

ABSTRACT:
A subsurface safety valve well tool securable in a well conduit for controlling flow of fluid through the bore of the conduit. An increase or decrease in the well pressure from the normal flowing pressure of the well operates a rotatable ball valve to block flow of fluid through the conduit. Increasing and then decreasing the pressure in the bore above the ball valve rotates the valve to enable flow of fluid through the conduit.

REFERENCES:
patent: 3292706 (1966-12-01), Grimmer et al.
patent: 3762471 (1973-10-01), Mott
patent: 3821962 (1974-07-01), Mott
patent: 3826462 (1974-07-01), Taylor
patent: 3870102 (1975-03-01), Mott
patent: R25471 (1963-11-01), Fredd

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