Results 101 to 110 of about 718 (143)

An agent-based dynamic reliability modeling method for multistate systems considering fault propagation: A case study on subsea Christmas trees

Process Safety and Environmental Protection, 2022
Abstract The fault propagation of multistate systems (MSSs) with various operational modes is a critical factor affecting the reliability and safety of systems. However, traditional methods have difficulty describing the influence of function transitions and multiple faults of components on fault propagation, and are inapplicable for accurately ...
Xing Guo, Qiang Feng, Dongming Fan, Zili Wang, Yi Ren, Bo Sun, Dezhen Yang   +6 more
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Strength design method for tubing hanger of subsea christmas tree against big temperature difference

China Ocean Engineering, 2014
The tubing hanger is an important component of the subsea Christmas tree, experiencing big temperature difference which will lead to very high thermal stresses. On the basis of API 17D/ISO 13628-4 and ASME VIII-1, and by comprehensively considering the erosion of oil and the gravity load of the tubing, a calculation model is established by regarding ...
Xiao-lan Luo, Yu-hong Gu, Chang-ling Liu, Rui Qin, Hong-lin Zhao, Meng-lan Duan   +5 more
openaire   +1 more source

The Application of ROV for the Subsea Christmas Tree Installation in the LiWan3-1 Deepwater Oilfield

Applied Mechanics and Materials, 2013
Chinas offshore oil and gas has been developed from shallow water to deep water. Subsea production facilities play more and more role in deepwater oil and gas fields, in which Christmas tree is the key equipment to control and regulate the oil well production of deepwater production systems, but it has great installation costs and risk.
Jin Gan Zhang, Hui Zheng, Jian Gen Bu, Cheng Gang Li   +3 more
openaire   +1 more source

Hydraulic capacitance compensation for long umbilical lines in hydraulic control system of Offshore Subsea Christmas Trees

2012 Oceans, 2012
To optimize the umbilical line design of the Offshore Subsea Christmas Tree Control System (OSCTCS) and reduce its cost, a mathematical lumped parameter model of the umbilical is developed. Taking advantage of the intermittent flow-rate need of the OSCTCS and the hydraulic capacitance compensation effect of the long umbilical lines between the ...
null Gaosheng Luo, null Linyi Gu, null Lin Li, null Jiawang Chen   +3 more
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Thermal Stress Calculation and Its Application to Bending Angle Design of Flowlines of Subsea Christmas Tree

ICPTT 2011, 2011
Based on diverse situations of the flowline of subsea Christmas tree installation and its working conditions, a theoretical model for calculation of the flowline is proposed by taking comprehensive considerations of different influencing factors, such as water depth, temperature of petroleum and gasoline, and angles of the flowline. By using the ABAQUS
Rui Qin, Hongping Tian, Qingping Li, Menglan Duan, Xiaolan Luo, Yongtian Kang   +5 more
openaire   +1 more source

Numerical analysis of cathodic protection of a Q355ND frame in a shallow water subsea Christmas tree

Materials Testing
Abstract This study develops a 3D model of a Christmas tree using cathodic protection technology and conducts numerical simulations on the Q355ND framework of a shallow Christmas tree. The boundary element method is employed for modeling, examining the distribution of protection potentials under varying corrosion layer breakage rates,
Shaodong Ju, Yuming Liu, Qishuai Yin, Xing Wang, Shiqiang Wang, Zitao Jiang, Siyao Deng   +6 more
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Reliability analysis of subsea Christmas tree structure based on fuzzy fault tree

International Conference on Mechanical Design and Simulation (MDS 2022), 2022
Peng Jia, Zhuang Liu, Peilin Liu, Feng Yin, Lei Zhou, Nan Pang, Lei Shi   +6 more
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Analysis of safety and impact probability of subsea Christmas tree impacted by falling objects

Marine Structures, 2023
Nan Pang, Xiangyu Wang, Zhuang Liu, Kai Xu, Zhong Liu, Zhonggang Xiong, Chao Li   +6 more
openaire   +1 more source

Remaining useful life prediction considering degradation interactions of subsea Christmas tree: A multi-stage modeling approach

Ocean Engineering, 2022
Xiaoyan Shao, Yingying Wang, Baoping Cai, Yonghong Liu, Weifeng Ge, Yiliu Liu, Xiangdi Kong, Qiang Feng, Yiqi Liu, Zengkai Liu, Renjie Ji   +10 more
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Research on a mechanical model of subsea Christmas tree during Lowering Stage in Deepwater based on Sea Trial

2022 Global Conference on Robotics, Artificial Intelligence and Information Technology (GCRAIT), 2022
Wenbo Meng, Shujie Liu, Yi Huang, Liang Huang, Haixiang Zhang, Dianju Wang, Bicheng Gan   +6 more
openaire   +1 more source