Hydraulically released window mill
AssigneeBaker Hughes Incorporated
InventorsCalvin J. Stowe, James M. McNicol, Andrew D. Ponder
Life of this patent
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Abstract
An affixation and release arrangement includes a first component having a fluid pressure chamber. A piston is mounted in the first component and exposed to the fluid pressure chamber. A second component is affixed to the first component through the piston, the piston being responsive to fluid pressure increase within the chamber to unaffix the second component from the first component.
Claims16
An affixation and release arrangement for a whipstock and a mill in a borehole comprising:
- a mill having a fluid pressure chamber;
- a piston mounted in the mill and exposed to the fluid pressure chamber;
- a whipstock affixed to the mill through the piston, the piston responsive to applied fluid pressure from surface within the chamber to unaffix the whipstock from the mill.
A method for releasing a mill and whipstock combination from each other comprising;
- pressuring a piston within a chamber of the mill wherein the pressuring is by applied pressure from a surface location;
- loading a fastener with the piston pursuant to the pressuring;
- overcoming the fastener by the loading with the piston;
- releasing the mill from the whipstock as a result of overcoming the fastener.
A method for releasing a mill and whipstock combination comprising;
- pressuring a piston within a chamber of the mill by applied pressure from a surface location;
- loading a securement engaged with the piston pursuant to the pressuring;
- overcoming the securement by loading with the piston;
- releasing the mill from the whipstock as a result of overcoming the securement.
Dependencies are inferred from the claim text.