Marine riser fill-up valve

Details Marine riser fill-up valve Marine riser fill-up valve

1985-03-04

1986-11-11

Chambers, A. Michael

Fluid handling

Ambient condition change responsive

Underwater

251 611, 251342, 166320, 166350, 166367, F16K 1736

Patent

active

046216553

ABSTRACT:
A marine riser safety valve is disclosed which, when placed in series with a deep water marine riser string, prevents collapse of riser pipe when inadvertent gas influx replaces the drilling fluid column. A cylindrical body is provided having a depression formed therein with at least one diaphragm port from the central bore of the body through the wall of the depression. A valve port is provided axially from the depression. A cylindrical member including a cylindrical diaphragm and a valve sleeve are joined end-to-end. The cylindrical member is disposed about the exterior of the body with the elastomeric diaphragm covering the depression and the valve sleeve covering the valve port. When a differential pressure develops across the wall of the diaphragm of a predetermined threshold, the diaphragm constricts into the body depression and moves the valve sleeve axially, opening the valve port to permit sea water influx. An outer skirt is provided to prevent outward ballooning of the diaphragm when bore pressure is greater than the surrounding sea water pressure.

REFERENCES:
patent: 1767201 (1930-06-01), Boynton
patent: 3312238 (1967-04-01), Voit, Jr.
patent: 3559734 (1971-02-01), Pitts
patent: 3779263 (1973-12-01), Edwards et al.
patent: 3981360 (1976-09-01), Marathe
patent: 4294284 (1981-10-01), Herd
patent: 4330039 (1982-05-01), Vann et al.
patent: 4496173 (1985-01-01), Roche et al.
Inspection Coating Services, 1978/79, General Catalog, Vetco Services Group, vol. 4, World Oil.

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