Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Submerging – raising – or manipulating line of pipe or cable...
Reexamination Certificate
2006-11-10
2010-06-29
Bagnell, David J (Department: 3672)
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Submerging, raising, or manipulating line of pipe or cable...
C405S169000, C405S224200, C166S367000
Reexamination Certificate
active
07744312
ABSTRACT:
A pipe string (44) is pulled out by a tug boat (30) from a floating structure (12) such as a production vessel, as pipe sections (54, 56) are connected in series on the vessel, to eventually lay the pipe string in a catenary curve from the vessel to the sea floor and then along the sea floor to a distant subsea well head (86). To save time and cost in coupling the pipe sections, lower fatigue resistant pipe couplings, such as non weld-on couplings (120) that include a threaded sleeve (134), are used to connect pipe sections that will lie in a quiescent zone such as on the sea floor (zone Az), and in a zone (Cz) lying along the middle of the catenary curve. Higher fatigue resistant pipe couplings such as weld-on couplings (150) are used along active zones such as top and bottom zones (Dz, Bz) of the catenary curve.
REFERENCES:
patent: 1756597 (1930-04-01), Keenan
patent: 6364022 (2002-04-01), Kodaissi et al.
patent: 6394154 (2002-05-01), Pollack
patent: 2002/0054789 (2002-05-01), Alliot
patent: 2005/0063788 (2005-03-01), Clausen
patent: 2006/0201564 (2006-09-01), Pllack et al.
patent: 2007/0056155 (2007-03-01), Reimert
patent: 2007/0063517 (2007-03-01), Pallini et al.
patent: WO 2004/035375 (2004-04-01), None
Pollack Jack
Riggs David C.
Bagnell David J
Fiorello Benjamin
Rosen Leon D.
Single Buoy Moorings Inc.
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