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US 7,681,652 B2Granted
Packer setting device for high-hydrostatic applications
AssigneeBaker Hughes Incorporated
InventorsSean L. Gaudette, James C. Doane, Robert S. O'Brien
Life of this patent
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Abstract
A packer setting device provides a buffered setting mechanism as a substantially incompressible fluid is selectively flowed into a compressible fluid chamber to compress a compressible fluid. This fluid transfer causes movement of a setting sleeve so that an associated packer device is set within a wellbore.
Claims19
A setting device for actuating a wellbore tool within a wellbore, the device comprising:
- an interior mandrel defining a central flowbore;
- a setting member for contacting an actuatable portion of a wellbore tool, the setting member being moveable between a first position, wherein the actuatable portion of the tool is actuated;
- a compressible fluid chamber defined within the setting device radially outside of the interior mandrel and containing a compressible fluid, the compressible fluid chamber comprising a plurality of axial blind bores formed within a housing surrounding the interior mandrel;
- an incompressible fluid chamber defined within the setting device radially outside of the interior mandrel and containing a substantially incompressible fluid at a higher pressure than the compressible fluid;
- a trigger device to selectively flood the compressible fluid chamber with the substantially incompressible fluid;
- and wherein
- the setting member is moved from the first position to the second position upon flooding of the compressible fluid chamber with the incompressible fluid from the incompressible fluid chamber.
4 more elements
A packer assembly for use within a wellbore, the assembly comprising:
- a packer device that is moveable between an unset position and a set position;
- a packer setting device associated with the packer device to move the packer device from the unset position to the set position, the packer setting device comprising:
- a housing that is interconnected with the packer device;
- a compressible fluid chamber comprising a helically coiled tube within the housing that is filled with a substantially compressible fluid;
- an incompressible fluid chamber within the housing that is filled with a substantially incompressible fluid;
- a trigger device to selectively flood the compressible fluid chamber with the substantially incompressible fluid;
- and
- a setting member that is selectively moveable between first and second positions to set the packer device, the setting member being moved from the first to the second position when the compressible fluid chamber is flooded with the substantially incompressible fluid.
5 more elements
A method of actuating a well tool within a wellbore having an annulus, the method comprising the steps of:
- operably associating a well tool actuator with a downhole well tool, the well tool actuator having a setting member with movement responsive to hydrostatic pressure;
- flowing wellbore fluid from the annulus into the well tool actuator under hydrostatic pressure;
- opening a tortuous, flow restrictive flow path within the well tool actuator;
- flowing a substantially incompressible fluid into a compressible fluid chamber within the well tool actuator along the flow path under impetus of the wellbore fluid;
- and
- wherein flowing the substantially incompressible fluid into the compressible fluid chamber causes the setting member to move and actuate the down hole well tool.
3 more elements
Dependencies are inferred from the claim text.