Buoyancy system for submerged structural member

Details Buoyancy system for submerged structural member Buoyancy system for submerged structural member

E - Fixed Constructions

02

B

61/9

E02B 17/00 (2006.01) B63B 21/50 (2006.01)

Patent

CA 1257099

ABSTRACT OF THE DISCLOSURE A buoyancy system for a tension leg platform tether 10 or other element extending a significant vertical distance through a body of water. A series of bulkheads 25 divide the interior of the tether 10 into individual buoyancy cells 31. A central access tube 32 extends along the central axis of the tether 10, passing through a sealed penetration in each bulkhead 25. A series of cascade conduits 42 are provided the lower portion of each buoyancy cell 31 in fluid communication with the buoyancy cell 31 immediately above. A tool 82 is provided for injecting air into a selected buoyancy cell 31. As air is injected, water exists through the central access tube 32 until the buoyancy cell 32 is emptied of water, at which point air passes through the cascade conduit 42 into the adjacent upper buoyancy cell. The tool 82 can also be used to selectively flood individual buoyancy cells 31.

514401

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