Backup shoe for well packer
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United States of America Patent
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Jan 12, 1999
Grant Date -
N/A
app pub date -
Nov 14, 1996
filing date -
Nov 14, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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