Subsurface safety valve

Details Subsurface safety valve Subsurface safety valve

1985-06-03

1986-08-05

Novosad, Stephen J.

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

166386, 166373, E21B 3410

Patent

active

046037420

ABSTRACT:
A tubing retrievable surface controlled subsurface safety valve having a rotatable ball-type flow closure element is disclosed. The ball element is rotationally operated and guided by a pair of guide members fixed in the valve by a stop ring. The guide members co-act with the ball to provide the desired rotational movement as well as providing a movement limit stop to prevent rotational overtravel of the ball. The tubular operator means imparts longitudinal movement to the ball greater than the predetermined movement required to effect the desired ball rotation prior to engaging the stop ring.
A locking sleeve having a longitudinal locking movement greater than the predetermined movement to rotate the ball open is provided. Operating movement of the locking sleeve uncovers a control fluid port for operating a supplemental subsurface valve operably secured with the valve. Prior to activating the locking sleeve to install the supplemental valve, the valve may be controlled through either of two conduits. Only one conduit may be used to operate the supplemental valve.

REFERENCES:
patent: 3901321 (1975-08-01), Mott
patent: 4347900 (1982-09-01), Barrington
patent: 4378850 (1983-04-01), Barrington

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