Wellhead stuffing box for polished rod and accessories for same

Details Wellhead stuffing box for polished rod and accessories for same Wellhead stuffing box for polished rod and accessories for same

1991-08-16

1992-08-25

Dang, Hoang C.

Wells

Above ground apparatus

Having retractable pipe section to allow closing of gate...

137527, 166 84, 166 97, E21B 3402, E21B 3303

Patent

active

051410524

ABSTRACT:
A wellhead stuffing box for a polished rod includes a body with an elongated opening extending through it to receive the polished rod. Packing in the body makes a sliding seal around the polished rod and a static seal against the interior of the body. Internal pushers are provided for compressing the packing with the required force for appropriate sealing, and the internal pushers cannot be changed without disassembling the body.

REFERENCES:
patent: 1572394 (1926-02-01), Krebs
patent: 2033306 (1936-03-01), Schofield
patent: 3211102 (1965-10-01), Keehan
patent: 3939910 (1976-02-01), Bruce
patent: 4099562 (1978-07-01), Mattoon
patent: 4299280 (1981-11-01), Greer
patent: 4377206 (1983-03-01), Chambers
patent: 4889184 (1989-12-01), Lugtmeier et al.
patent: 4907650 (1990-03-01), Heinonen

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