The design effort began with an exhaustive analysis of SCR motions and stresses, defining critical areas that are adversely affected by extreme motions. Atlantia engineers then developed a deep-draft hull design, drawing upon the expertise of SBM Offshore Group sister company GustoMSC-OceanDesign, an experienced designer of marine drilling rigs.
Instead of a conventional design approach driven by payload capacity, Atlantia focused on ways to limit motions that adversely affect SCRs and SCR connections. The result is a deep-draft, four-column, ring-pontoon hull design that will support large facilities while extending SCR fatigue life.
The deep-draft design was verified by thorough global analysis and model-testing performed in late 2003, and detailed engineering of the first 37,000-ton-displacement FPU hull for 8,000-ft-deep water has been completed.
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