Wellhead assembly with pressure actuated seal assembly and...

Details Wellhead assembly with pressure actuated seal assembly and... Wellhead assembly with pressure actuated seal assembly and...

2006-08-29

2006-08-29

Beach, Thomas A (Department: 3671)

Wells

Submerged well

Connection or disconnection of submerged members remotely...

C166S387000, C166S339000

Reexamination Certificate

active

07096956

ABSTRACT:
A subsea well assembly includes a wellhead housing50having a cylindrical inner sealing surface and a tubular hanger10having a tapered external sealing surface. The running tool30includes a central stem40connected to the running string. A setting piston72is responsive to fluid pressure in the annulus about the running string, and has a radially outer surface and a radially inner surface each for sealing with the running tool body. Fluid pressure to set the seal assembly may be applied to the setting piston through an annulus about the running string, and may also act directly on an initially set seal assembly20.

REFERENCES:
patent: 3693714 (1972-09-01), Baugh
patent: 4561499 (1985-12-01), Berner et al.
patent: 4674576 (1987-06-01), Goris et al.
patent: 4757860 (1988-07-01), Reimert
patent: 4766956 (1988-08-01), Smith et al.
patent: 4969516 (1990-11-01), Henderson et al.
patent: 5044442 (1991-09-01), Nobileau
patent: 5372201 (1994-12-01), Milberger
patent: 6557638 (2003-05-01), Cunningham et al.

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