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This document summarizes a study on the motion characteristics and operability of three semi-submersible drilling rig designs with square section columns and pontoons. The three designs, called DUOVAR-A, DUOVAR-B, and TRIVAR, have displacements of 24,144 tons and are intended to operate in the Natuna Sea. Motions of the designs in regular waves were computed using a 3D diffraction model. Motion characteristics in random waves were obtained using a wave spectrum. According to the evaluation, DUOVAR-B has the

Author

Sofyan

Language

EN