Wells – Valves – closures or changeable restrictors – Fluid operated
Reexamination Certificate
2005-08-08
2009-06-30
Thompson, Kenneth (Department: 3672)
Wells
Valves, closures or changeable restrictors
Fluid operated
C166S374000, C166S386000, C251S030010
Reexamination Certificate
active
07552773
ABSTRACT:
A multicycle hydraulic control valve. A control and actuation system for a well tool includes a control valve having one or more metal-to-metal seals which open while differential pressure exists across the seals to thereby selectively connect pressure sources to an actuator to operate the well tool. Both seals may be closed while a connection between the actuator and the pressure sources is switched by the control valve. The control valve may include a member having areas formed thereon acted upon by various pressures to facilitate operation of the control valve.
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Schultz Roger L.
Wright Adam
Halliburton Energy Service,s Inc.
Smith Marlin R.
Thompson Kenneth
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