Deep water riser flotation apparatus

Details Deep water riser flotation apparatus Deep water riser flotation apparatus

1999-03-11

2000-12-05

Taylor, Dennis L.

Hydraulic and earth engineering

Marine structure or fabrication thereof

11423013, 166350, 166359, 175 7, 405224, 4052231, E02B 1138, E21B 712

Patent

active

06155748&

ABSTRACT:
A dual phase riser flotation system contains a number of passive phase buoyancy modules of syntactic foam contained within an outer skin, and a number of active phase buoyancy modules which are similar to air canisters in that they may be inflated or deflated as required to provide levels of buoyancy. The passive phase buoyancy modules may contain tubes filled with air, a compressed gas such as nitrogen, or evacuated to provide additional buoyancy. Charge and discharge valves connect gas flow lines to a manifold system serving the active phase buoyancy modules.

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