Title: Optimal design of dual derricks

Authors: Xingping Xu; Lei Wang; Guangdou Liu; Xin Zhang

Addresses: College of Mechanical and Electronic Engineering, China University of Petroleum, Dongying 257061, China. ' College of Mechanical and Electronic Engineering, China University of Petroleum, Dongying 257061, China. ' College of Mechanical and Electronic Engineering, China University of Petroleum, Dongying 257061, China. ' College of Mechanical and Electronic Engineering, China University of Petroleum, Dongying 257061, China

Abstract: The history of dual derricks is introduced briefly. Theory of optimal design for dual derricks is given. Taking the least weight as an optimal goal, the optimal model of a dual derrick is established and optimal design variables are set. Optimal design is done under six different operation conditions. The optimal procedure is given and the optimal structure analysed. By optimal design, the weight of the dual derrick can be reduced by about 10%.

Keywords: dual derricks; modelling; optimal design; offshore drilling; drilling platforms; drilling rigs; derrick design.

DOI: 10.1504/IJMIC.2012.048640

International Journal of Modelling, Identification and Control, 2012 Vol.17 No.1, pp.61 - 67

Published online: 19 Aug 2012 *

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