Stuffing box apparatus

Details Stuffing box apparatus Stuffing box apparatus

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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