Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Patent
1992-01-21
1993-10-05
Britts, Ramon
Wells
Processes
Operating valve, closure, or changeable restrictor in a well
166 55, 166 72, 166323, E21B 3406
Patent
active
052496309
ABSTRACT:
A tubing retrievable safety valve, lockout tool and method of use are disclosed that are adapted to lock the valve open permanently and provide access to control line pressure by perforating the piston in the valve. The lockout tool comprises a track mandrel having a ramp slidably disposed beneath a punch that is adapted to penetrate the piston wall of the valve at a point adjacent to the control fluid annulus, thereby creating a protrusion adapted to lock the valve open and establishing fluid communication between the control fluid annulus and the valve bore.
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Dickson Rennie L.
Meaders Michael W.
Britts Ramon
Daunis Jennifer R.
Otis Engineering Corporation
Ross Monty L.
Tsay Frank S.
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