Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Submerging – raising – or manipulating line of pipe or cable...
Patent
1995-12-04
1997-12-30
Graysay, Tamara L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Submerging, raising, or manipulating line of pipe or cable...
138109, 285412, 405170, F16L 1900, F16L 2300, F16L 2302, F16L 2312
Patent
active
057022054
ABSTRACT:
A marine riser system for a bottom-supported platform which can be installed by divers without the use of J-tubes or I-tubes. A flowline, e.g. steel pipeline, is laid between a subsea well or the like, and a jacket of a bottom-supported platform. The free end of the flowline is curved upwardly in a catenary amd is attached to the jacket at a depth which is below the turbulence zone but is one which is substantially above the marine bottom; preferably at a depth at which divers can safely work. After the flowline is structurally attached to the jacket, the free end of the flowline is fluidly connected (e.g. by divers) to a substantially vertical riser section which is clamped within the jacket and which extends through the turbulence zone to the surface.
REFERENCES:
patent: 3557564 (1971-01-01), Hauber
patent: 4717287 (1988-01-01), Laursen
patent: 4810133 (1989-03-01), Kopp et al.
patent: 5092711 (1992-03-01), Langner
patent: 5269629 (1993-12-01), Langner
"Design and Installation of Auger Steel Catenary Risers", E.H. Phifer et al, OTC 7620, Houston, TX, May 2-5, 1994.
"A Hybrid Riser for Deep Water"; C.H. Alexander; OSEA--94113; Singapore; Dec. 6-9, 1994.
Chandler Bruce D.
Garrett David L.
Killeen Joseph P.
Mahone William C.
Graysay Tamara L.
Keen Malcolm D.
Mayo Tara L.
Mobil Oil Corporation
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