Analysis and practice of wellhead suction anchor installation in deep sea

HAN Zelong; SONG Gang; NIU Qinglei; SHAO Yutao; CUI Shuying; ZHU Ronghua; LI Bo and CHEN Genlong; ${author.authorNameEn}

doi:10.12143/j.ztgc.2023.05.016

2023 Vol. 50, No. 5

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Article navigation > DRILLING ENGINEERING > 2023 > 50(5): 109-115

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HAN Zelong, SONG Gang, NIU Qinglei, SHAO Yutao, CUI Shuying, ZHU Ronghua, LI Bo and CHEN Genlong, . 2023. Analysis and practice of wellhead suction anchor installation in deep sea. DRILLING ENGINEERING, 50(5): 109-115. doi: 10.12143/j.ztgc.2023.05.016

Citation:

HAN Zelong, SONG Gang, NIU Qinglei, SHAO Yutao, CUI Shuying, ZHU Ronghua, LI Bo and CHEN Genlong, . 2023. Analysis and practice of wellhead suction anchor installation in deep sea. DRILLING ENGINEERING, 50(5): 109-115. doi: 10.12143/j.ztgc.2023.05.016

Analysis and practice of wellhead suction anchor installation in deep sea

1.Institute of Exploration Techniques, CAGS, Langfang Hebei 065000, China
;2.Ocean College, Zhejiang University, Zhoushan Zhejiang 316021, China;
3.Guangzhou Marine Geological Survey, CGS, Guangzhou Guangdong 511458, China

Received Date: 20 April 2023

Revised Date: 29 June 2023

Abstract

Abstract

During the second gas hydrate trial production test， the deep-sea wellhead suction anchor technology was firstly applied in the Shenhu sea area， which provids stable wellhead support for horizontal gas hydrate production wells in shallow soft formations. Through the theoretical calculation and finite element analysis， the self-weight penetration depth and negative pressure demand in the process of suction anchor penetration are studied. At the same time， the construction technology of “step-by-step intermittent self-weight penetration， dragging and continuous negative pressure sinking” was adopted in site， which ensured the successful installation of the first domestically produced deep-sea wellhead suction anchor. The field practice results show that the theoretical calculation results are close to the actual construction situation， and the theoretical analysis can guide the installation of suction anchors at the wellhead. In addition， the penetration construction technology is featured of fast， efficient and safe. The indicators of the wellhead suction anchor installation reached the usage demand. It has referential value for the application of suction anchor technology in the fields of deep-sea oil and gas.
- deep-sea wellhead suction anchor /
- marine gas hydrate production test /
- self weight penetration /
- suction penetration

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References

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