Backup shoe for well packer

Details Backup shoe for well packer Backup shoe for well packer

1996-11-14

1999-01-12

Dang, Hoang C.

Wells

Packers or plugs

Central support has shoulders expanding sealing portion, or...

166179, 277584, E21B 33128

Patent

active

058575200

ABSTRACT:
A backup shoe for a well packer provides high pressure sealing capability without requiring a large setting force or setting stroke of the packer. In a preferred embodiment, a backup shoe has an inner portion with a relatively thin cross-section and an outer portion with a relatively thick cross-section. Additionally, the inner portion has a pivot point between its ends. In a preferred embodiment of a packer utilizing the backup shoe, an element retainer axially contacts the inner portion adjacent its pivot point, and a seal element axially contacts an inner sloping surface formed on the outer portion.

REFERENCES:
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patent: 2847073 (1958-08-01), Arterbury et al.
patent: 4438933 (1984-03-01), Zimmerman
patent: 4457369 (1984-07-01), Henderson
patent: 4487258 (1984-12-01), Jackson et al.
patent: 5311938 (1994-05-01), Hendrickson et al.
patent: 5390737 (1995-02-01), Jacobi et al.
patent: 5433269 (1995-07-01), Hendrickson
patent: 5701954 (1997-12-01), Kilgore et al.
Baker Sand Control Gravel Pack Systems Brochure, p. 21, Undated.

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