Stuffing box

Details Stuffing box Stuffing box

1991-10-25

1993-06-08

Bagnell, David J.

Wells

Above ground apparatus

With seal for reciprocating member

277 30, 277 31, E21B 3303, F16J 1556

Patent

active

052170683

ABSTRACT:
An improvement in a stuffing box for a rotary polished rod having a tubular housing with first and second rod guides disposed at each end and packing elements therebetween. The lower rod guide is in the form of an annular bushing, and annular interior sealing elements are disposed at each of the ends of the bushing thereby effecting a sealing engagement between the internal surface of the bushing and the external surface of the rod. An annular exterior sealing element is disposed on the external surface of the bushing thereby effecting a sealing engagement between the external surface of the bushing and the internal surface of the housing, and bearing members are interposed between the rod guides and packing elements, each having an inner race rotatable with the polished rod and an outer stationary race.

REFERENCES:
patent: 2199735 (1940-05-01), Beckman
patent: 2864631 (1958-12-01), Kemp
patent: 4640305 (1987-02-01), Johnson

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