Difference between revisions of "Semi-submersible"
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Revision as of 04:37, 9 September 2008
"These platforms have legs of sufficient buoyancy to cause the structure to float, but of weight sufficient to keep the structure upright. Semi-submersible rigs can be moved from place to place; can be ballasted up or down by altering the amount of flooding in buoyancy tanks; they are generally anchored by with chain, wire rope and/or polyester rope during drilling operations, though they can also be kept in place by the use of dynamic positioning. Semi-submersibles can be used in water depths from 200 to 10,000 feet (60 to 3,050 m)."
|Structure requirements · PintStead · Spar · Semi-submersible · Submersible · Boats · Collaborative Design · Space Frame · Low Cost Seastead · Conex dumbbell · Docks ·|
|Materials · Thin Shell Ferrocement · Concrete · Geopolymer · Basalt|
|Low Cost Wave Tank · Scale models · Wind Loads · Seasteading Software|
|Stability & Propulsion|
|Stability · Propulsion · Station Keeping · Gyroscopes · Stabilizers · Pneumatically Stabilized Platforms · Connections|