Ocean Engineering Equipment and Technology ›› 2015, Vol. 2 ›› Issue (3): 175-183.

Previous Articles     Next Articles

Taut Mooring System Design and Analysis of Octagon FDPSO

Qiang SUN1, Qing-hui DONG1, Gui-sheng PENG1, Tian TIAN1, Bin XIE2, Shi-sheng WANG2, Xi-chong YU2, Jing-rui ZHAO2   

  1. 1. Dalian Shipbuilding Industry Engineering and Research Institute Co., Ltd., Dalian, Liaoning 116021, China
    2. CNOOC Research Institute, Beijing 100028, China
  • Received:2015-04-07 Online:2015-06-10 Published:2016-01-21


The existing mooring systems are compared and analyzed with the consideration of vessel shape, environmental condition and design cases. Average-distributed taut mooring system is finally selected for the octagon floating drilling, production, storage and off loading system (FDPSO) in the South China Sea. According to the requirements of station keeping and line forces, an averaged-distributed taut mooring system is designed based on the environmental condition at the depth of 2 000 m in the South China Sea. Compared with the traditional catenary mooring system designed for the same FDPSO, the averaged-distributed taut mooring system reduces the mooring system self-weight and the mooring radius on seabed. In addition, the offset of FDPSO with one mooring line damaged can be efficiently managed under 100-year environmental condition. The proposed mooring system can meet the requirements of octagon FDPSO. Furthermore, the research results will offer references for the mooring design of similar floating structures.

Key words: mooring system, floating drilling, production, storage and off loading system (FDPSO), taut mooring, catenary mooring

CLC Number: