Results 1 to 10 of about 718 (143)

A comprehensive risk assessment method for Christmas tree combined with a multi source information fusion algorithm and an improved HAZOP method. [PDF]

PLoS ONE
The Christmas tree faces significant safety risks during installation and requires extremely high reliability during operation. In this study, a comprehensive risk assessment method combined GA-BP neural network and improved HAZOP method is established ...
Qiong Wang, Huimin Li, Guanlong Ren
doaj   +2 more sources

Prediction Method for RUL of Underwater Self-Enhancement Structure: Subsea Christmas Tree High-Pressure Valve Actuator as a Case Study

Journal of Marine Science and Engineering, 2023
Underwater pressure-bearing structures are produced in practice by means of pressure self-enhancement methods in order to improve the stress distribution and enhance the pressure-bearing performance.
Peng Liu, Chen Dai, Shuo Zhao, Shuaiqiang Li, Bilong Liu, Guijie Liu   +5 more
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Experimental and Numerical Study on the Slug Characteristics and Flow-Induced Vibration of a Subsea Rigid M-Shaped Jumper [PDF]

Applied Sciences, 2023
The subsea jumper has become an essential part of subsea production systems as a gas–liquid mixing pipeline connecting the pipeline end manifold (PLEM) to the Christmas tree.
Wenhua Li, Jiahao Li, Guang Yin, Muk Chen Ong   +3 more
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Reliability Analysis of Subsea Christmas Tree System Based on FFTA and FMEA

Shiyou jixie, 2022
At present, most of the reliability analysis on subsea Christmas tree system only considers the influence of some typical fault modes on the system. Therefore, in the paper, the fuzzy fault tree analysis method(FFTA)and the fault mode and effect analysis
Liu Chao, Liu Jian, Xiao Wensheng, Hu Zhongqian, Li Zhong   +4 more
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Flow Safety Analysis and Application of Production Fairway of Subsea Christmas Tree

Shiyou jixie, 2023
At present,there is a lack of fine characterization on the temperature and pressure field performance in the production fairway of subsea Christmas tree during the production of oil and gas wells,and there is a lack of research on the generation ...
Ren Guanlong, Meng Wenbo, Wang Yu, Yu Yi, Wang Yingying   +4 more
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Design Optimization of a VX Gasket Structure for a Subsea Connector Based on the Kriging Surrogate Model-NSGA-II Algorithm Considering the Load Randomness

Algorithms, 2019
The VX gasket is an important part of the wellhead connector for a subsea Christmas tree. Optimization of the gasket’s structure can improve the connector’s sealing performance.
Wei Zeng, Tao Ren, Lijun Yu, Jingjing Huang   +3 more
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Analysis on Localized Key Technologies of Gate Valve and Actuator Used in Subsea Christmas Tree

Shiyou jixie, 2021
The gate valve and actuator structure of subsea Christmas tree is different from the onshore valve structure, the gate and valve seat seal and actuator structure are more complex, and the reliability requirements are higher.
Wan Chunyan, Jia Xiangfeng, Wang Dingya, Liu Wenxiao, Wang Xiaojing, Li Na   +5 more
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Simulation Study on Hydraulic System of Shallow Mud Line Christmas Tree

Shiyou jixie, 2022
In order to explore the hydraulic system performance of ST4×2-5M shallow mud line Christmas tree, the parameters, functions and principles of the 3 key parts affecting the performance of the hydraulic system were studied, and the models of gate ...
Li Huan, Sun Chuanxuan, Li Lei, Lei Wanzheng, Liu Wenxiao   +4 more
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Research on a Real-time Reliability Evaluation Method Integrated with Online Fault Diagnosis: Subsea All-electric Christmas Tree System as a Case Study

Strojniški vestnik - Journal of Mechanical Engineering, 2022
The subsea all-electric Christmas tree is key equipment in subsea production systems. If a failure occurs, the marine environment will be seriously polluted. Therefore, strict reliability analysis and measures to improve reliability must be performed before such equipment is launched, which is crucial to safe subsea production.
Liu, Peng, Shen, Dagang, Cao, Jinfeng
openaire   +1 more source

Comparative Analysis of Installation Methods of 500 m Subsea Christmas Tree

Shiyou jixie, 2020
At present, the common installation methods for subsea Christmas tree in China are drill pipe installation method and wire rope installation method. For the subsea Christmas tree with a water depth of 500 m and a weight of 70 t, the marine engineering ...
Zhang Weiguo, Li Yong, Jin Hao
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