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US 2003/0070801 A1Published application
Small tubular window system
AssigneeBaker Hughes Incorporated
InventorsStephen K. Harmon, Roy E. Swanson JR., Marc D. Kuck
Life of this patent
Estimating the term…
Abstract
A through tubing retrievable whipstock and installation method is disclosed. In the preferred embodiment, a plurality of anchor links pivot at one end and have wickers on an opposed rounded end. The links are configured to deliver an optimum contact angle with respect to the longitudinal axis of the whipstock in a variety of casing sizes and weights. A lock ring system holds the set position and the upper end is hinged and biased to stay out of the way of the mill or mills and yet be easy to engage by a retrieving tool.
Claims20
A casing whipstock, comprising:
- an elongated tapered body;
- at least one anchor link mounted to said body, said link having an end that moves into anchoring engagement with the casing along a non-linear surface thereof.
Dependencies are inferred from the claim text.