Wells – Processes – Placing or shifting well part
Reexamination Certificate
2005-06-08
2008-10-07
Gay, Jennifer H (Department: 3672)
Wells
Processes
Placing or shifting well part
C166S208000, C166S216000
Reexamination Certificate
active
07431096
ABSTRACT:
A liner hanger includes an annular slip seat that radially surrounds a section of the liner being hung. The slip seat contains a plurality of windows that each accommodates at least one intermediate slip seat. The intermediate slip seats, in turn, each contain windows that accommodate a slip element. There are tongue and groove arrangements between the slip seat and the intermediate slip seat as well as between the intermediate slip seat and the slip element that allow axial movement of the slip element to be translated by camming surfaces into radial outward movement of both the intermediate slip seat and the slip element. The imposition of one or more intermediate slip seats, in an embedded or nested relationship, allows for greater radial expansion of the slip elements with respect to the interior liner.
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patent: 2124275 (1984-02-01), None
patent: WO 93/20329 (1993-10-01), None
Andrews David
Baker Hughes Incorporated
Gay Jennifer H
Hunter Shawn
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