Self aligning stuffing box and guide bushing assembly

Details Self aligning stuffing box and guide bushing assembly Self aligning stuffing box and guide bushing assembly

1998-02-17

1999-12-14

Tsay, Frank

Wells

Above ground apparatus

With seal for reciprocating member

1662411, 166387, E21B 3303

Patent

active

06000469&

ABSTRACT:
A stuffing box and guide bushing assembly, particularly adapted for use with a reciprocating pump rod connected to a downhole well pump and to a pumping unit on the Earth's surface. The stuffing box includes a frame comprising a lower plate member with a floor surface, an upper plate member spaced from the lower plate member and including an opposed and generally parallel roof surface, the upper plate member being supported by circumferentially spaced longitudinally extending column members. The upper plate member includes an internal threaded bore centered at the longitudinal central axis of the stuffing box assembly, which axis is also the central axis of the well and the desired central axis of reciprocation of the pump rod. A guide bushing includes a bore for receiving the pump rod and an externally threaded hub portion for engagement with the bore of the upper plate member. The upper plate member is releasably secured to the frame column members by bolts which are arranged on a bolt circle equally spaced so that the upper plate member and the guide bushing may be indexed 90.degree., 180.degree. or 270.degree. in either direction from an initial position to present a new bearing surface by the bushing with respect to the pump rod as wear occurs on the bushing.

REFERENCES:
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patent: 5137083 (1992-08-01), Bump
patent: 5257812 (1993-11-01), Osorio et al.
patent: 5791411 (1998-08-01), Ricalton et al.
patent: 5857518 (1999-01-01), Vinson, Sr.

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