Wells – Above ground apparatus – With seal for reciprocating member
Reexamination Certificate
2011-04-19
2011-04-19
Stephenson, Daniel P (Department: 3676)
Wells
Above ground apparatus
With seal for reciprocating member
C277S333000
Reexamination Certificate
active
07926560
ABSTRACT:
A seal assembly for use with a rotating control head is provided. The seal assembly includes a rotatable member and a cavity formed between the rotatable member and a tubular radially inwardly disposed from the rotatable member. The cavity having a first surface and a second surface. The seal assembly further includes a seal member having a first end and a second end disposed between the first surface and the second surface of the cavity and sealable with the tubular between the first and the second ends due to deformation of the seal member.
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Bailey Thomas F.
Chambers James W.
Gravouia Mark F.
Patterson & Sheridan LLP
Stephenson Daniel P
Weatherford / Lamb, Inc.
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