Subsea wellhead apparatus

Details Subsea wellhead apparatus Subsea wellhead apparatus

1990-04-27

1992-09-01

Neuder, William P.

Wells

Submerged well

Connection or disconnection of submerged members remotely...

166368, E21B 33043

Patent

active

051431580

ABSTRACT:
There is disclosed subsea wellhead apparatus which includes a tubing hanger supported within the bore of a wellhead housing and having a passageway through it connecting the annulus between the casing and tubing strings suspended from the hangers with the bore of the housing above the tubing hanger. The passageway is opened and closed by a valve member carrying metal seal rings, and the integrity of the seals is tested by test pressure from a reservoir contained in the tubing hanger.

REFERENCES:
patent: 3360048 (1967-12-01), Watkins
patent: 3536344 (1970-10-01), Nelson
patent: 3957079 (1976-05-01), Whiteman
patent: 3970147 (1976-07-01), Jessup et al.
patent: 3971576 (1976-07-01), Herd et al.
patent: 4333526 (1982-06-01), Ratkins
patent: 4449583 (1984-05-01), Lawson
patent: 4869318 (1989-09-01), Kelletz
patent: 4903774 (1990-02-01), Oykes et al.

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