文章基本信息

标题：STABILITYANALYSIS OF UNDERWATER WELLHEAD OF DEEP-WATER DRILLING UNDER COMPLICATED GEOLOGICAL ENVIRONMENT
本地全文：下载
作者：Yu Song ; Jin Yang ; Zhong Li 等
期刊名称：Fresenius Environmental Bulletin
印刷版ISSN：1018-4619
出版年度：2021
卷号：30
期号：6
页码：7624-7631
语种：English
出版社：PSP Publishing
摘要：In order to ensure the safe deepwater drilling under complex geological conditions, reduce the risk of deepwater drilling accidents,and improve the sta-bility of underwater wellhead of deepwater drilling, a deepwater drilling underwater wellhead stability analysis method is proposed. Through the blowout preventer group, riser string, riser assembly and other parts, we construct the deepwater drilling un-derwater wellhead structure model, analyze the un-derwater soil mechanical properties, and determine the stability influence of the wellhead top tension and complex geological conditions. From the two as-pects ofriser and casing string, we realize the force analysis of the underwater wellhead, calculate the load and bearing capacity of the deepwater drilling underwater wellhead, and output the analysis results of the stability of the deepwater drilling underwater wellhead through the comparison of the load and the bearing capacity. The research results show that the maximum load of the underwater wellhead of deep-water drilling is 400kN. As the resultant force in the horizontal direction increases, the bending moment and offset of the underwater wellhead of deepwater drilling increases and the stability decreases. With the increase of vertical force, the vertical subsidence ofthe underwater welhead of deepwater drilling in-creases and the stability increases. Compared with the horizontal force, the vertical force can effectively improve the stability of the wellhead.
关键词：Complicated geological conditions;deep water drilling;underwater wellhead;wellhead stability