Dome-type packoff wellhead

Details Dome-type packoff wellhead Dome-type packoff wellhead

1981-07-20

1983-08-30

Novosad, Stephen J.

Wells

Above ground apparatus

Inner member anchor or seal with lateral port

166 84, E21B 3303

Patent

active

044011601

ABSTRACT:
A wellhead assembly for wells having tubing carrying hot fluids into or out of the well. The tubing is subject to elongation due to thermal expansion from a fixed portion within the well. The present wellhead accommodates the thermal elongation and provides a noncontacting connection to the tubing from outside the wellhead. The wellhead may also be constructed to accommodate concentric tubing for hot fluids to or from separate portions of the well.

REFERENCES:
patent: 1942598 (1934-01-01), Hewgley
patent: 2186139 (1940-01-01), Hild
patent: 2230589 (1941-02-01), Driscoll
patent: 2771956 (1956-11-01), Johnson
patent: 3478822 (1969-11-01), Holbert, Jr. et al.
patent: 4071085 (1978-01-01), Grable et al.

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