Wellhead stuffing box for rotating rod string

Details Wellhead stuffing box for rotating rod string Wellhead stuffing box for rotating rod string

1996-03-18

1998-08-11

Dang, Hoang C.

Wells

Above ground apparatus

With seal for reciprocating member

166 685, 277 31, E21B 3303

Patent

active

057914117

ABSTRACT:
A tubular mandrel is provided as a sleeve around the portion of the rod string polish rod extending through the stuffing box housing. The mandrel is coupled to the polish rod so that they rotate together. Bearings stabilize the mandrel within the housing. Stationary rotary seal means are provided in the housing to seal against the now-stabilized mandrel. Leakage and seal wear are improved when compared with the prior art approach of using compressed packing in direct contact with the polish rod to provide the rotary seal.

REFERENCES:
patent: 1679962 (1928-08-01), Crans
patent: 2126007 (1938-08-01), Guiberson et al.
patent: 2333847 (1943-11-01), Deely
patent: 2675994 (1954-04-01), Smith et al.
patent: 2846247 (1958-08-01), Davis
patent: 5370179 (1994-12-01), Mills
patent: 5401104 (1995-03-01), Newton

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