Molded Composite Slip Adapted for Engagement With an Internal Surface of a Metal Tubular
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United States of America Patent
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Issued Date -
Aug 21, 2008
app pub date -
Feb 16, 2007
filing date -
Feb 16, 2007
priority date (Note) -
Abandoned
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Abstract
The gripping capability of a composite slip for a downhole zonal isolation tool is enhanced by applying high friction material to the outer surface of the composite slip. Preferably the high friction material is granular abrasive arranged in circumferential rows on the outer surface of the composite slip. The composite slip including the high friction material is easily formed by matched metal compression molding of epoxy fiberglass sheet molding compound. By molding circumferential grooves in the outer surface of the composite body of the slip, granular abrasive is easily bonded with epoxy adhesive to the composite slip body in order to form the rows of granular abrasive. It is also possible to embed the granular abrasive into the composite material of the slip when the composite slip is molded.
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