Whipstock apparatus and methods of use

Details Whipstock apparatus and methods of use Whipstock apparatus and methods of use

1994-02-25

1995-06-20

Buiz, Michael Powell

Wells

Expansible anchor or casing

1661176, E21B 3300

Patent

active

054254191

ABSTRACT:
An oil field Whip-Anchor System, for deviating a well bore, which uses an improved Whipstock incorporating a new setting apparatus and method, attached to a hydraulic or mechanical anchor packer is disclosed. The complete Whip-Anchor System also includes an apparatus and method for retrieving the Whip-Anchor if it is used in well bores which require retrievable well bore deviation tools. The new apparatus reduces the number of whipstock bodies that must be warehoused to three fundamental types which fit all commonly used well bores. The apparatus permits the proper "set" of a mechanical packer without fear of shearing the releasable attachment device currently used in the industry and permits an operator to "bottom hole wash" while setting a mechanical packer in a well bore. The same technique and apparatus are used for both mechanical or hydraulic packers. The system utilizes a slot cut in the face of the whipstock for setting and retrieval. Other improvements include a pinned spring loaded hinge assembly which assures that the tip of the whipstock will fall against the well bore, a deflector plate that uses polycrystaline diamond inserts to reduce wear on the top portion of the device during the window milling operation.

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