Wells – Valves – closures or changeable restrictors – Fluid operated
Patent
1992-08-03
1994-06-07
Neuder, William P.
Wells
Valves, closures or changeable restrictors
Fluid operated
166322, E21B 3410
Patent
active
053181271
ABSTRACT:
A safety system including a surface controlled subsurface safety valves for use in a well having annulus fluid flow. One of the safety valves has a valve closure member, and a small diameter offset piston actuator to move the valve closure member in response to control fluid pressure conducted from the well surface to its open position which allows annulus fluid flow. A spring biases the valve closure member to block annulus fluid flow. The annulus safety valve has an enlarged flow area for use in high volume gas injection wells. The annulus safety valve has metal-to-metal sealing systems to improve valve life under harsh downhole well environments.
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Dickson Rennie L.
Hines Craig D.
Campbell Mason M.
Druce Tracy W.
Halliburton Company
Malorzo Thomas V.
Neuder William P.
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