Results 1 to 10 of about 100 (96)

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
doaj   +2 more sources

Sealing Degradation Modeling and Reliability Analysis Method of Deep-Water Pipeline Connector Based on the Two-Phase Nonlinear Wiener Process

Modelling and Simulation in Engineering
The deep-water pipeline connector (DPC) is a key piece of equipment for the connection of multiple facilities located in different positions of the subsea production system.
Wei Zeng, Xumin Tian, Haisheng Chen, Wen Sun   +3 more
doaj   +2 more sources

Surface Casing Buckling Effect on the Wellhead Movement of a Subsea Well

Mathematical Problems in Engineering, Volume 2022, Issue 1, 2022., 2022
In this work, the wellhead axial movement of a subsea well was predicted with a previously presented multi‐string model modified to account for a possible buckling of the well’s surface casing. This model represented the structural casing with a nonlinear spring that considers the casing‐soil interaction using t-z curves with hysteretic behavior.
Charlton O. de Souza, José Renato M. de Sousa, Gilberto B. Ellwanger, Emilio César C. M. da Silva, Jianguang Fang   +4 more
wiley   +1 more source

Gas Hydrate Formation Risk and Prevention for the Development Wells in the Lingshui Gas Field in South China Sea

Geofluids, Volume 2021, Issue 1, 2021., 2021
Hydrate formation risk is an important challenge in the development of deep‐water gas field. Considering the characteristics of the Lingshui (LS) gas field in the South China Sea and the difference of well structures, a model for calculating wellbore temperature and pressure in deep‐water gas production well is proposed and verified by the field data ...
Donglei Jiang, Yi Yu, Yi Huang, Wenbo Meng, Jianbo Su, Zhenggang Gong, Shengnan Nancy Chen   +6 more
wiley   +1 more source

Experimental and Numerical Study on the Slug Characteristics and Flow-Induced Vibration of a Subsea Rigid M-Shaped Jumper

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
doaj   +1 more source

Contact mechanical behaviors of radial metal seal for the interval control valve in intelligent well: Modeling and theoretical study

Energy Science &Engineering, Volume 8, Issue 4, Page 1337-1352, April 2020., 2020
The two‐dimensional axisymmetric assembly of the radial metal seal and the closure member is abstracted as a combination of interference fit model and cantilever beam model. The related theoretical model between the radial metal seal's contact stress and its independent variables has been derived.
Yiwei Yang, Hongwu Zhu, Dongsheng He, Changcheng Du, Liangbin Xu, Yufa He, Yan Zheng, Zhewei Ye   +7 more
wiley   +1 more source

Natural Frequencies and Mode Shapes of Drill Pipe in Subsea Xmas Tree Installation

Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020
In this study, experimental and numerical investigations on the vibration characteristics of a drill pipe during the lowering of a subsea Xmas tree were presented. A fourth‐order partial differential equation with variable coefficients was established based on Euler–Bernoulli beam theory.
Wensheng Xiao, Haozhi Qin, Jian Liu, Qi Liu, Junguo Cui, Fengde Wang, Jian Li   +6 more
wiley   +1 more source

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
doaj  

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
doaj