BUOYANCY DEVICE FOR MARINE STRUCTURES
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United States of America Patent
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Issued Date -
Oct 20, 2011
app pub date -
Oct 6, 2009
filing date -
Oct 9, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Disclosed is a buoyancy device for tensioning an elongate vertical (or quasi vertical) subsea structure at a point below the sea surface, anchored at its bottom. The device comprises as its main buoyancy elements a plurality of hollow elongate objects, and further comprises at least one auxiliary buoyancy element comprising a solid buoyant material. Ideally, the solid buoyant material provides enough uplift to maintain the device afloat should the main buoyancy elements be flooded. A riser apparatus comprising such a buoyancy device is also described.
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