DRILLSHIP WITH ROTATION TYPE MULTI DERRICK

摘要

The present invention relates to a drillship having a rotation-type multi derrick. According to the present invention, a moon pool can be omitted; the fluid resistance of a hull can be reduced based on a decrease in immersion surface area; a plurality of derrick structures can accelerate a drilling operation; a plurality of derricks can be operated with a single operating system; the generation of a sloshing impact can be avoided; floating ice infiltration or freezing can be avoided when used in polar regions; the hull can be balanced with stability even when a protruding cantilever structure protrudes from the side surface of the hull; and dock mooring can be unrestricted despite the protruding derrick structure. The present invention includes: first and second rotating platforms rotatably disposed to be symmetrical on both sides from the vertical center line of the hull, and protrudes outside from the hull by the rotation in a state of being positioned on an upper side of the hull; first and second rotational driving units which respectively rotates the first and second rotating platforms from the hull; and first and second derricks positioned on the upper side of the hull by being disposed on the respective ones of the first and second rotating platforms, and protrudes from the hull with the first and second rotating platforms which are rotated by the first and second rotation driving units.