Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Submerging – raising – or manipulating line of pipe or cable...
Patent
1998-08-21
2000-08-29
Bagnell, David
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Submerging, raising, or manipulating line of pipe or cable...
405169, 405172, 166341, 166344, F16L 112
Patent
active
061098302
ABSTRACT:
A riser system for connecting a seabed installation to a floating vessel consists of first and second fluid conveying conduits (13,14) connected by an articulated joint (7). In a standby condition the articulated joint (7) is anchored to the seabed, the two conduits (13,14) are not in fluid communication with one another and the upper conduit (13) rises substantially vertically with the aid of a buoyancy device (9). In use, the upper conduit (13) is pulled in to a floating vessel, thereby releasing the articulated joint (7) from the anchor (8) and allowing the joint to pivot in order to connect the upper and lower conduits (13,14) to allow passage of fluid therethrough.
REFERENCES:
patent: 3376708 (1968-04-01), Hindman
patent: 3710859 (1973-01-01), Hanes et al.
patent: 4493590 (1985-01-01), Ayers et al.
patent: 4848949 (1989-07-01), Castel
patent: 4906137 (1990-03-01), Maloberti et al.
patent: 5807027 (1998-09-01), Ostergaard
Bagnell David
Bluewater Terminal Systems N.V.
Lagman Frederick L.
LandOfFree
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