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Determining methods for basic parameters of deepwater drilling riser single
CHANG Yuan-jiang1,JU Shao-dong1,CHEN Guo-ming1,XU Liang-bin2,YIN Zhi-ming2,ZHAO Li-hong3
(1. Center for Offshore Engineering & Safety Technology, China University of Petroleum, Qingdao 266555, China-,;2. Research Institute of China Offshore Oil,Beijing 100027, China;3. Shandong Taian Coal Mining Machinery Group C0,Ltd,Taian 271000, China)
Abstract:
A method for determining the basic parameters of deepwater drilling riser single was proposed,which includes determination method of parameters for main pipe and auxiliary lines,buoyancy modules, and classification of the riser connector. The results show that the circumstantial stress,axial stress and collapse pressure criterion can all be used to determine the dimension of the main pipe. However, the results based on the circumstantial stress criterion are more conservative, and equivalent stress criterion can be used to determine the parameters of the peripheral lines of the joint. Depending on water depth, the outside diameter and density of the buoyancy modules should be determined reasonably, and the classification of the riser connector should be checked in different load cases according to API codes. The riser joints with the outside diameter of 0. 533 4 m and inside diameter of 0. 488 95 m can be operated in water depth of 1. 830 km, and the fill valve is not necessary to the riser system. The design of peripheral lines and riser clamps meets the requirement of strength and stability. Three kinds of buoyancy modules meet the needs to the water depth, and matching E-class riser connector meets the requirements.
Key words:  deepwater drilling  riser  basic parameters  determination methods  joint