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 Yazhou Zhu,Chengmeng Sun,Hongde Qin,et al.Study on the Design Method of the Jack-up’s X-Type Cantilever Allowable Load Nephogram[J].Journal of Marine Science and Application,2014,(3):315-320.[doi:10.1007/s11804-014-1262-x]
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Study on the Design Method of the Jack-up’s X-Type Cantilever Allowable Load Nephogram


Study on the Design Method of the Jack-up’s X-Type Cantilever Allowable Load Nephogram
Yazhou Zhu Chengmeng Sun Hongde Qin Bin Jiang and Yansong Fan
Yazhou Zhu Chengmeng Sun Hongde Qin Bin Jiang and Yansong Fan
1. College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China 2.Offshore Engineering Equipment Research Institute, Bohai Equipment Manufacturing Co., Ltd., China National Petroleum Corporation (CNPC), Panjin 124010, China
jack-up cantilever expand cantilever allowable load nephogram drilling ability x-type cantilever
The extending of a cantilever and transverse moving of a drilling floor enable the jack-up to operate in several well positions after the Jack-up has pitched. The cantilever allowable load nephogram is the critical reference which can evaluate the jack-up’s drilling ability, design the cantilever structure and instruct a jack-up manager to make the operations safe. The intent of this paper is to explore the interrelationships between the cantilever position, drilling floor and the loads including wind force, the stand set-back weight etc., through analyzing the structure and load characteristics of the x-type cantilever and the simplified mechanics model with the restriction of the maximum moment capacity of the cantilever single side beam. Referring to several typical position designs load values, the cantilever allowable load nephogram is obtained by using the suitable interpolation method. The paper gives a method for cantilever allowable load design, which is proved reliable and effective by the calculation example.


Bienen B, Cassidy MJ (2009). Three-dimensional numerical analysis of centrifuge experiments on a model jack-up drilling rig on sand. Canadian Geotechnical Journal, 46(2), 208-224.
Cassidy MJ (1999). Non-linear analysis of jack-up structures subjected to random waves, PhD Thesis, University of Oxford, United Kingdom.
Cassidy MJ (2011). Offshore foundation systems for resource recovery: assessing the three-dimensional response of jack-up platforms. KSCE Journal of Civil Engineering, 15(4), 623-634.
Cassidy MJ, Martin LM,Houlsby GT (2004). Development and application of force resultant models describing jack-up foundation behaviour. Marine Structures, 17(2),165-193.
Cassidy MJ, Randolph MF, Byrne BW (2006). A plasticity model describing caisson behaviour in clay. Applied Ocean Research, 28(5), 345-358.
Cassidy MJ, Vlahos G, Hodder M (2010). Assessing appropriate stiffness levels for spudcan foundations on dense sand. Marine Structures, 23(2), 187-208.
Chen Hong, Li Chunxiang (2004). Introduction of development on jack-up drilling platform. China Offshore Platform, 2004, 22(6), 1-6.
Fan Dunqiu, Dong Sheng, Meng Zhanbin (2011). Design research on cantilever beam of jack-up drilling platform. Shipbuilding of China, 52(supp 2), 138-144.
Karunakaran D, Baerheim M, Spidsoe N (1998). Measure and simulated dynamic response of a jacket and a large jack-up platform in North Sea. Offshore Technology Conference, Annual Proceedings, 369-380.
Karunakaran D, Spidsoe N (1997). Verification of methods for simulation of nonlinear dynamic response of jack-up platforms. Marine Structures, 10(2-4), 181-219.
Li Hongtao, Li Ye (2011). Stability analysis of foundation strength of Jack-up platform. Ocean Engineering, 29(1), 105-110.
Lu Haohua (2005). The dynamic response of offshore jack-up platform. Master’s degree, Wuhan University of Technology, Wuhan, China.
Wang Longting, Wang Xilu, Liang Huigao, Xu Xingping, Wang Gang (2009). Structure characteristics of foreign cantilever beams of the jack-up drilling platform. Offshore Oil, 29(4), 89-93.
Qian Yalin, Bo Yubao (2009). Primary investigation of cantilever jack up drilling platform. Shipbuilding of Shanghai, 77(1), 15-18.
Ren Xiangang, Bai Yong, Jia Lusheng (2011). Cantilever beam study of offshore jack-up drilling rig. Journal of Ship Mechanics, 15, 4, 402-409.
SNAME (2002). Guidelines for Site Specific Assessment of Mobile Jack-up Units.
Vlahos G, Cassidy MJ, Martin CM (2011). Numerical simulation of pushover tests on a model jack-up platform on clay. Geotechnique, 61(11), 947-960.
Zhang Jian,Tang Wenxian, Su Shijie, Gao Chao, Liu Renchang (2013). Effect of environmental loads on dynamical researchs of jack-up. Shipping of China, 54(1), 93-100.


Last Update: 2014-10-16