Semi-submersible platform: The floating platform has hull (columns and pontoons) that, when flooded with seawater, cause the pontoons to submerge to a predetermined depth. Semi Submersibles are generally used for offshore Deepwater drilling operations with water depth ranging from 600 meters - 3,600 meters and are deployed in areas such as the Gulf of Mexico and South America.
Specifications：
The platforms are generally kept in place by the use of dynamic positioning (DP) system. Semi Submersibles have advanced capabilities to drill in ultra deep waters.
