Downhole tool and method
AssigneeHydralock Systems Limited
InventorsNeil Andrew Abercrombie Simpson, Michael Wardley
Life of this patent
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Abstract
A downhole tool includes a body, a mandrel slidably disposed in the body, a piston for moving the mandrel relative to the body, and a lock having a first configuration which permits movement of the mandrel by the piston and a second configuration which provides a fluid lock across the mandrel which prevents movement of the mandrel by the piston. The lock includes first and second fluid chambers filled with a substantially incompressible fluid and a control valve configurable between an open configuration and a closed configuration, the control valve in the closed configuration providing the fluid lock preventing movement of the mandrel.
Claims23
A downhole hydraulic actuator tool for use in conjunction with a variety of downhole tools to be controlled, said downhole actuator tool configured to engage and control actuation of a downhole tool or device to be controlled, said downhole actuator tool comprising:
- a body configured to be coupled to a body of an associated tool or device to be controlled, the downhole actuator tool and the associated downhole tool or device to be controlled together forming part of a tubular string for running into a bore;
- an actuation member disposed in and carried by the body of said downhole actuator tool and axially moveable relative to the body, the actuation member comprising a tubular mandrel having an axial throughbore therethrough, the actuation member configured for attachment to, or to engage, an actuation mechanism of said associated tool or device to be controlled;
- an actuation arrangement comprising a piston configured to move the actuation member relative to the body of said downhole actuator tool, wherein the piston is directly or operatively coupled to, or forms part of, the actuation member,
- wherein the downhole actuator tool is configurable between an axially retracted configuration and an axially extended configuration, the downhole actuator tool configured so that axially movement of the actuation member relative to the body of the downhole actuator tool reconfigures the downhole actuator tool from the retracted configuration to the extended configuration and applies an axial push force to the actuation mechanism of said associated tool or device and wherein axial movement of the actuation member relative to the body of said downhole actuator tool reconfigures the downhole actuator tool from the extended configuration to the retracted configuration and applies an axial pull force to the actuation mechanism of said associated tool or device;
- and
- a lock configured in a first configuration to permit movement of the actuation member by the actuation arrangement and configured in a second configuration to provide a fluid lock across the actuation member which prevents movement of the actuation member by the actuation arrangement.
Dependencies are inferred from the claim text.