Valve for use in a subsea drilling riser

Details Valve for use in a subsea drilling riser Valve for use in a subsea drilling riser

1998-11-16

2000-09-26

Lillis, Eileen D.

Wells

Submerged well

Riser

166364, F21B 1701

Patent

active

061231517

ABSTRACT:
There are disclosed two types of valves connectible in a subsea drilling riser to permit the opening and closing of side ports therein. One such valve is automatically opened when the hydrostatic subsea pressure is greater by a predetermined amount than that of drilling mud in the riser. The other valve is installed in the lower end of the riser and is adapted to be opened to discharge drilling fluid therefrom.

REFERENCES:
patent: 3559734 (1971-02-01), Pitts
patent: 3981360 (1976-09-01), Marathe
patent: 4621655 (1986-11-01), Roche
patent: 4832126 (1989-05-01), Roche
patent: 5826658 (1998-10-01), Harthorn et al.
"Subsea Riser Systems", Cooper Cameron pages (4) (undated).
"Riser Auto Fill Valve", 1996-7 Composite Catalog, p. 107, ABR Vetco Advertisement.
Hughes Offshore publication entitled "Automatic Riser Fill Valve--Regan Type FC" (4 pages) dated Nov. 21, 1981.

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