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Citation:
　An-ke Song,Li-ping Sun,Yong Luo and Qiang Wang.Evaluation of Station Keeping Systems for Deepwater Drilling Semi-submersibles[J].Journal of Marine Science and Application,2010,(3):312-316.[doi:10.1007/s11804-010-1013-6]
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Evaluation of Station Keeping Systems for Deepwater Drilling Semi-submersibles

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Title:
Evaluation of Station Keeping Systems for Deepwater Drilling Semi-submersibles
Author(s):
An-ke Song;  Li-ping Sun;  Yong Luo and Qiang Wang
Affilations:
Author(s):
An-ke Song;  Li-ping Sun;  Yong Luo and Qiang Wang
1. China Offshore Oil Engineering Co., Ltd, Tianjin 300452, China 2. Deepwater Engineering Research Center, Harbin Engineering University, Harbin 150001, China
Keywords:
polyester line;  mooring system;  time domain analysis
分类号:
-
DOI:
10.1007/s11804-010-1013-6
Abstract:
This paper addresses the need for systematic evaluation of the station keeping systems of deepwater drilling semi-submersibles. Based on the selected drilling semi-submersible configuration, the mooring systems were analyzed and designed for a range of water depths using different mooring line materials. These were steel wire rope, polyester rope and HMPE (high modulus poly ethylene). The mooring analysis was carried out using the advanced fully coupled time domain analysis method in the computer software package HARP. Diffraction analysis was first applied to solve the hydrodynamic properties of the vessel and then the motion equations of the complete dynamic system including the drilling rig, the mooring lines and risers were developed and solved in the time domain. Applying the advanced analysis method, a matrix of mooring systems was developed for operating in water depths of 1 000 m, 1 500 m, and 2 000 m using various mooring materials. The development of mooring systems was conducted in accordance with the commonly adopted mooring design code, API RP 2SK and API RP 2SM. Fresh attempts were then made to comparatively evaluate the mooring system’s characteristics and global performance. Useful results have been obtained in terms of mooring materials, water depths, and key parameters of mooring configurations. The results provide in-depth insight for the design and operation of deepwater mooring systems in the South China Sea environment.

References:

Casey NF, Banfield SJ (2005). Factors affecting the measurement of axial stiffness of polyester deepwater mooring rope under sinusoidal loading. Offshore Technology Conference, Houston, OTC-17068.
Chakrabarti S (2005). Handbook of offshore engineering. Elsevier, the Netherlands, 663-675.
Kim M, Ding Y, Zhang J (2003). Dynamic simulation of polyester mooring lines’. Proceedings of International Symposium on Deep-water Mooring System, Houston, 101-114.
Offshore Dynamics Inc., Texas A&M University (2003). HARP Manual. Houston, USA.
Shi S, Ran A, Qi C (2005). Coupled analysis of deep water floating systems. Shipbuilding of China, 46(4),47-51.

Memo

Memo:
Supported by China National 111 Project under Grant No. B07019.
Last Update: 2011-06-22