Floating offshore drilling/producing structure

Details Floating offshore drilling/producing structure Floating offshore drilling/producing structure

2006-08-15

2008-08-19

Lagman, Frederick L (Department: 3672)

Hydraulic and earth engineering

Marine structure or fabrication thereof

With anchoring of structure to marine floor

C405S224000, C405S223100, C405S211000, C114S264000, C114S266000

Reexamination Certificate

active

07413384

ABSTRACT:
A deep draft semi submersible structure wherein the semi-submersible has a center of gravity below its center of buoyancy and the structure is a floating vessel with at least three vertically oriented buoyant columns. Each of the vertically oriented buoyant columns have at least one ballasted compartment and the columns are spaced apart at a sufficient distance to reduce vortex induced vibration amplitude. There are at least two connecting structural sealed trusses connected to the columns below sea level, they are positioned to minimize hydrodynamic wave action on the trusses and to transfer shear loads between the columns while remaining transparent to wave and ocean current motion.

REFERENCES:
patent: 4906139 (1990-03-01), Chiu et al.
patent: 5558467 (1996-09-01), Horton, III
patent: 5683206 (1997-11-01), Copple
patent: 6190089 (2001-02-01), Bennett, Jr. et al.
patent: 6206614 (2001-03-01), Blevins et al.
patent: 6565286 (2003-05-01), Carr et al.
patent: 6575665 (2003-06-01), Richter et al.
patent: 6652192 (2003-11-01), Xu et al.
patent: 6761124 (2004-07-01), Srinivasan
patent: 6817309 (2004-11-01), Horton
patent: 6884003 (2005-04-01), Horton, III
patent: 6935810 (2005-08-01), Horton, III
patent: 6968795 (2005-11-01), Lambregts et al.
patent: 7063158 (2006-06-01), Horton, III
Finn LD, Mahar JV, Gupta H, “The Cell Spar and VIM”, Proceedings of Offshore Technology Conference, OTC 15245, Houston, TX 2003.
International Search Report and Written Opinion for PCT/US07/75891 dated May 16, 2008 (8 pages).

Affiliated with

Also associated with

Rating

Floating offshore drilling/producing structure does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Floating offshore drilling/producing structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Floating offshore drilling/producing structure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4010566