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Study of the Installation Process of the Subsea Tree Passed Through the Splash Zone

Author

Listed:
  • Yufang Li

    (College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China)

  • Honglin Zhao

    (College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China)

  • Ning Xu

    (College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China)

  • Xiaoyu Wang

    (College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China)

  • Deguo Wang

    (College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China)

Abstract

The subsea tree is one of the critical pieces of equipment in the subsea production system, and its installation is related to the safe production of offshore oil and gas. Due to the differences in the form of the structures, the speed of entering the water, the marine environment, and other factors, the process of the structure entering the water is exceedingly complicated. During the engineering installation, the most dangerous phase involves the structure passing through the splash zone. Based on the theory of the movement of the subsea tree passing through the splash zone, Lingshui 17-2 subsea tree installation was analyzed with the marine engineering software OrcaFlex, and a sensitivity analysis of the lowering of the subsea tree was performed. During the splash zone phase, the wave height had the highest impact on the subsea tree, affecting the horizontal offset and cable load, which may lead to the oil tree capsizing and cable breakage. Furthermore, the velocity only affected the horizontal offset, and the overall effect was not noticeable. The operational safety window for the subsea tree installation was established according to the operational safety standards. Therefore, the recommended lowering speed was 0.50 m/s, while the flow velocity should not exceed 1.50 m/s, and the wave height should not be higher than 4.5 m.

Suggested Citation

  • Yufang Li & Honglin Zhao & Ning Xu & Xiaoyu Wang & Deguo Wang, 2020. "Study of the Installation Process of the Subsea Tree Passed Through the Splash Zone," Energies, MDPI, vol. 13(5), pages 1-14, February.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:5:p:1014-:d:324702
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    References listed on IDEAS

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    1. Bhattacharyya, S.K. & Cheliyan, A.S., 2019. "Optimization of a subsea production system for cost and reliability using its fault tree model," Reliability Engineering and System Safety, Elsevier, vol. 185(C), pages 213-219.
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    Cited by:

    1. Zhang, Puyang & Li, Yan'e & Ding, Hongyan & Le, Conghuan, 2022. "Response analysis of a lowering operation for a three-bucket jacket foundation for offshore wind turbines," Renewable Energy, Elsevier, vol. 185(C), pages 564-584.
    2. Zhang, Puyang & Li, Yan'e & Le, Conghuan & Ding, Hongyan & Yang, Zhou & Qiang, Li, 2022. "Dynamic characteristics analysis of three-bucket jacket foundation lowering through the splash zone," Renewable Energy, Elsevier, vol. 199(C), pages 1116-1132.

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