Wells – Packers or plugs – Cup type
Reexamination Certificate
2006-04-05
2008-10-14
Gay, Jennifer H (Department: 3672)
Wells
Packers or plugs
Cup type
C166S387000, C166S191000, C277S342000, C277S339000
Reexamination Certificate
active
07434617
ABSTRACT:
A cup tool for use with a high-pressure mandrel of a wellhead isolation tool has a three-part packoff assembly that slides over a cup tool tube from an unset position to a set position. The three-part pack off assembly includes an elastomeric cup, a rigid alignment ring located above the elastomeric cup and an elastomeric packoff element located above the rigid alignment ring. The rigid alignment ring helps ensure that the elastomeric cup remains correctly aligned in a casing or tubing that is not straight, is out of round or is washed, and helps ensure that the elastomeric packoff achieves a high-pressure seal in the set position, even under adverse downhole conditions.
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Gay Jennifer H
Hutchins Cathleen R
Nelson Mullins Riley & Scarborough LLP
Stinger Wellhead Protection, Inc.
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