Wells – Processes – Placing or shifting well part
Reexamination Certificate
2007-08-14
2007-08-14
Thompson, Kenneth (Department: 3672)
Wells
Processes
Placing or shifting well part
C166S387000, C166S376000, C166S317000, C166S332800, C166S133000
Reexamination Certificate
active
10658979
ABSTRACT:
A method and apparatus for use in a subterranean well is described. The apparatus typically includes a mandrel and a packing element. The mandrel may have an outer surface and a non-circular cross-section and a the packing element may be arranged about the mandrel, the packing element having a non-circular inner surface matching the mandrel outer surface such that concentric rotation between the mandrel and the packing element is precluded. The apparatus may include slips having cavities to facilitate removal of the apparatus. The apparatus also may include a valve for controlling fluid flow through a hollow mandrel. The valve may include a flapper having at least one tab to engage at least one recession in the mandrel such that rotation between the mandrel and the valve is precluded when the valve is in a closed position. The apparatus may further include a central member which is releaseably attached to the mandrel by a release mechanism.
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Allen Tommy J.
Cox Blake Robin
Deel Donald W.
Garrison, III Hubert F.
Lehr Douglas J.
BJ Services Company
Howrey LLP
Thompson Kenneth
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