Slip retention mechanism for subterranean well packer
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United States of America Patent
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-
May 1, 1990
Grant Date -
N/A
app pub date -
Dec 6, 1985
filing date -
Dec 6, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A slip retention mechanism for a packer or hanger for a subterranean well comprises a slip retention sleeve disposed in surrounding relationship to a tubular body on which cone elements are mounted for axial movement. Segment-shaped slips are mounted in the space intermediate the retention sleeve and the tubular body and have inner surfaces cooperable with the cone elements to effect a radially outward displacement of the slip elements upon relative axial movement of the cone elements. The slip retention sleeve is provided with a plurality of peripherally spaced windows separated by axially extending bars. Each slip segment is provided with an axially extending slot in its outer surface which is aligned with one of the window bars. A leaf spring is mounted intermediate the window bar and the axial slot to exert a radially inwardly directed force on the respective slip segment to hold it in a retracted position. A pair of lateral and radially extending spring projections are formed on the leaf spring to cooperate with lateral slots provided on the exterior of the slip segment to secure the slip segment and spring in their operative positions.
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