Packoff nipple

Details Packoff nipple Packoff nipple

1992-07-07

1993-11-16

Britts, Ramon S.

Wells

Above ground apparatus

Moving tubing or cable into an existing well

166 96, 166196, 166387, E21B 2306, E21B 33128

Patent

active

052614875

ABSTRACT:
A packoff nipple for use on the mandrel of a wellhead isolation tool features a two step extrusion sealing arrangement activated by a primary element forcing the expansion of a packing ring to fill voids in the tubing or casing brought about by pipe erosion, corrosion, out of round or off center mandrel conditions. Extremely high pressures are sealed off from the wellhead. The packoff nipple sealing elements are protected from damage when running the nipple through restricted areas in the wellhead and the tubing or casing.

REFERENCES:
patent: 2610689 (1946-08-01), Eckel
patent: 3830304 (1974-08-01), Cummins
patent: 4023814 (1977-05-01), Pitts
patent: 4111261 (1978-09-01), Oliver
patent: 4541490 (1985-09-01), Bigbie et al.
patent: 4601494 (1986-07-01), McLeod
patent: 4632183 (1986-12-01), McLeod
patent: 4867243 (1989-09-01), Garner et al.
patent: 4993489 (1991-02-01), McLeod
patent: 5060723 (1991-10-01), Sutherland et al.
patent: 5080174 (1992-01-01), Hynes
patent: 5103900 (1992-04-01), McLeod et al.

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