Abstract:
An electrical actuator (10) is particularly suited for driving a wellhead valve (12) for regulating the flow of natural gas from a production well (16). The electrical actuator (10) can be driven using the existing local power supply (24) in wellhead valve systems, typically a solar panel (24) and a battery (26). The electrical actuator (10) may include a gear reduction train (76), a brake (78) and a manual input override (80) with clutch protection. The electrical actuator (10) can be configured in three different operational modes that provides a predetermined position upon power loss including fail-bias fixed, fail open and fail bias closed.
Abstract:
An electrical actuator is particularly suited for driving a wellhead valve for regulating the flow of natural gas from a production well. The electrical actuator can be driven using the existing local power supply in wellhead valve systems, typically a solar panel and a battery. The electrical actuator may include a gear reduction train, a brake and a manual input override with clutch protection. The electrical actuator can be configured in three different operational modes that provides a predetermined position upon power loss including fail-bias fixed, fail open and fail bias closed.