Spillproof oil well seal

Details Spillproof oil well seal Spillproof oil well seal

1991-03-06

1991-11-26

Bui, Thuy M.

Wells

Above ground apparatus

With seal for reciprocating member

E21B 3303

Patent

active

050675630

ABSTRACT:
A spillproof sealing system for hydrocarbon-producing wells which produce gas and crude oil is provided. The sealing system includes a liquid sealing element which cooperates with a gas sealing component positioned about the well polished rod to seal the well against crude oil leaks while simultaneously providing sufficient oil to lubricate and cool the polished rod during well operation. A liquid/gas separation chamber is provided to receive gas from the well that has been pressurized by a compressor to seal the gas sealing component. Excess gas and crude oil are returned to the well production line. Liquid level sensing and switch means are further provided to automatically shut down the well motor if the crude oil level in the liquid/gas separation chamber exceeds an established minimum level.

REFERENCES:
patent: 2674474 (1954-04-01), Lister
patent: 3967678 (1976-07-01), Blackwell
patent: 4071085 (1978-01-01), Grable et al.
patent: 4326584 (1982-04-01), Watkins
patent: 4390063 (1983-06-01), Wells, Jr.
patent: 4655284 (1987-04-01), McIlvride
patent: 4917190 (1990-04-01), Coppedee

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