Wells – Above ground apparatus – With seal for reciprocating member
Reexamination Certificate
2011-04-26
2011-04-26
Thompson, Kenneth (Department: 3672)
Wells
Above ground apparatus
With seal for reciprocating member
C166S085300, C277S323000
Reexamination Certificate
active
07931078
ABSTRACT:
A stuffing box apparatus for sealing between a polish rod in a hydrocarbon production well comprises a tubular housing arranged for connection to the well which has a bore therethrough to receive the polish rod. Sealing members are supported in the bore of the housing in an upper stack and a lower stack of smaller outer diameter separated by an intermediate bushing. An upper bushing compresses the upper stack against the intermediate bushing. The lower bushing fixes the lower stack against the bottom of the intermediate bushing. Each of the bushings includes a counter bore formed at one end which receives a wiper member arranged for sealing engagement between the bushing and the polish rod.
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Bateman Perry
Hockley Dale
Toporowski Barton
ADE & Company Inc.
Dupuis Ryan W.
Satterthwaite Kyle R.
Scope Production Developments Ltd.
Thompson Kenneth
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