Wellhead apparatus

Details Wellhead apparatus Wellhead apparatus

1984-03-08

1985-11-12

Novosad, Stephen J.

Wells

Above ground apparatus

Inner member anchor or seal with lateral port

166 82, 166 89, 166379, 166380, 166375, 166382, 166387, E21B 2300, E21B 3303

Patent

active

045522138

ABSTRACT:
There are disclosed several alternate embodiments of wellhead apparatus of the type in which hydraulic fluid may be transmitted to and/or from a subsurface safety valve or other hydraulically operable device within the well through an annular space formed between the production tubing.

REFERENCES:
patent: 2824757 (1958-02-01), Rhodes
patent: 2842209 (1958-07-01), Gibson
patent: 3004778 (1961-10-01), Williams et al.
patent: 3171489 (1965-03-01), Cole et al.
patent: 3976130 (1976-08-01), Chambless et al.
patent: 4367797 (1983-01-01), Brown
patent: 4458903 (1984-07-01), Tohill

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