Rotary control valve and associated actuator control system
AssigneeHalliburton Energy Services, Inc.
InventorsAdam D. Wright, Vincent P. Zeller
Life of this patent
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Abstract
A rotary control valve and associated actuator control system. An actuator control system comprises a rotary control valve including a generally planar face seal, and an actuator operatively connected to the rotary control valve. Another actuator control system comprises a control valve including multiple faces having multiple ports formed therein. Fluid communication is selectively permitted and prevented between the ports in response to relative displacement between the faces. A differential area is configured to apply a biasing force which maintains sealing engagement between the faces, and which increases in response to an increase in pressure applied to the control valve.
Claims20
An actuator control system, comprising:
- an actuator including at least first and second chambers;
- and
- a control valve operatively connected to the actuator, the control valve including a generally planar face seal between contacting faces of first and second valve members, a first face of the first valve member including first and second ports which are simultaneously in fluid communication with one of the first and second chambers, and a second face of the second valve member including third and fourth ports which are simultaneously in fluid communication with a pressure source, wherein the control valve selectively permits and prevents fluid communication between the pressure source and the one of the first and second chambers.
An actuator control system, comprising:
- an actuator including at least first and second chambers;
- and
- a control valve operatively connected to the actuator, the control valve including a generally planar face seal between contacting faces of a rotatable valve member and a stationary valve member, a first face of the stationary valve member including first and second ports which are simultaneously in fluid communication with one of the first and second chambers, and a second face of the rotatable valve member including third and fourth ports which are simultaneously in fluid communication with a pressure source,
- wherein the control valve selectively permits and prevents fluid communication between the pressure source and the one of the first and second chambers.
Dependencies are inferred from the claim text.