Abstract: A compact, axially aligned brushless servo motor actuation unit configured to manipulate a choke valve to control the pressure within a borehole during managed pressure drilling. The actuation unit including a brushless servo, a gear reduction assembly and a planetary roller actuator substantially aligned along a longitudinal axis and housed within a tubular housing, the gear reduction assembly defining a hollow core sized to enable a portion of a roller screw of the planetary roller actuator to pass therethrough for the purpose of reducing the overall length of the actuation unit along the longitudinal axis.

Abstract: Devices and methods for operating a linear actuator, optionally for use in controlling a choke valve as part of a managed pressure drilling operation. Such a device may include a motor, a transmission, a linear actuator and an override mechanism selectively engageable with the transmission to enable operation of the linear actuator independently of the motor.

Abstract: A compact, axially aligned brushless servo motor actuation unit configured to manipulate a choke valve to control the pressure within a borehole during managed pressure drilling. The actuation unit including a brushless servo, a gear reduction assembly and a planetary roller actuator substantially aligned along a longitudinal axis and housed within a tubular housing, the gear reduction assembly defining a hollow core sized to enable a portion of a roller screw of the planetary roller actuator to pass therethrough for the purpose of reducing the overall length of the actuation unit along the longitudinal axis.

Abstract: The present disclosure relates to a manual override tool for an electric actuator. The manual override tool includes an accessible first end, a shaft operably connected with the first end and is movable in a linear direction and is rotatable, and a plurality of gear teeth on the shaft. The accessible first end is used to engage and disengage the plurality of gear teeth with a plurality of notches provided on an interior rotor of the electric actuator, such that the accessible first end may be used to manually operate the electric actuator.

Abstract: The present disclosure relates to a manual override tool for an electric actuator. The manual override tool includes an accessible first end, a shaft operably connected with the first end and is movable in a linear direction and is rotatable, and a plurality of gear teeth on the shaft. The accessible first end is used to engage and disengage the plurality of gear teeth with a plurality of notches provided on an interior rotor of the electric actuator, such that the accessible first end may be used to manually operate the electric actuator.