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AssigneeHalliburton Energy Services, Inc.
InventorsRoger L. Schultz, Brock W. Watson, Robert K. Michael, James E. Masino
Estimating the term…
Electrohydraulic actuators and associated methods are utilized to control the operation of downhole well tool assemblies, representatively flow control devices. In a described embodiment thereof, each actuator is positioned downhole and comprises a self-contained, closed circuit hydraulic system including an electrically operable double action primary pump drivingly coupled to an associated well tool assembly via a first hydraulic circuit, and an electrically operable switching pump coupled to the first hydraulic circuit via a second hydraulic circuit interposed therein and operative to selectively alter the control flow of hydraulic fluid to the well tool assembly in a manner reversing its operation. To provide for selective, more rapid control of the well tool assembly, a chargeable accumulator is connected to the hydraulic circuitry and is selectively and drivably communicatable with the well tool assembly.
Apparatus for controlling operation of a downhole well tool assembly, comprising:
A method of controlling operation of a downhole well tool assembly, the method comprising the steps of:
A subterranean well completion comprising:
A method of controlling operation of multiple well tool assemblies positioned downhole in the wellbore of a subterranean well, the method comprising the steps of:
Hydraulic actuator apparatus for use in controlling operation of a downhole well tool assembly, comprising:
Dependencies are inferred from the claim text.