Wells – Above ground apparatus – With seal for reciprocating member
Reexamination Certificate
2005-06-28
2005-06-28
Thompson, Kenneth (Department: 3672)
Wells
Above ground apparatus
With seal for reciprocating member
C166S084400, C277S326000, C251S001100
Reexamination Certificate
active
06910531
ABSTRACT:
A stripper assembly for sealing around a drill pipe includes an outer housing having a lateral outlet. The outer housing is mounted at an upper end of a well for receiving an upward flow of drilling fluid and diverting the drilling fluid through the lateral outlet. An inner member is rotatably mounted in the outer housing. A rigid cartridge housing is mounted to the inner member for rotation therewith. The cartridge housing is open to drilling fluid. An annular elastomeric seal member is located in the cartridge housing. The cartridge housing limits upward, downward and outward movement of the seal member as it deforms against the drill pipe due to drilling fluid pressure.
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Bracewell & Giuliani LLP
Thompson Kenneth
Vetco Gray Inc.
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