摘要
分析水下井口系统力学特性时,需要确定水下井口系统的拖曳系数。鉴于此,采用Hydril公司的防喷器组单元尺寸参数为建模标准,并基于Transocean公司防喷器组的选型依据进行建模。在ANSYS流固耦合模块中对适用于不同深度的防喷器组型号及该深度下海水水体环境进行数值模拟。研究结果给出了适用于不同环境下的水下井口拖曳系数,并表明拖曳系数与传统确定方法相比具有较大的偏差,其与防喷器组结构尺寸相关明显,与雷诺数关系较小,即在静水体环境下,防喷器组拖曳系数可近似于仅与其型号有关。研究结果可为水下井口力学分析提供一定的参考依据。
Analysis on the mechanical properties of the subsea wellhead system requires the understanding of the system’s drag coefficient.Hydril’s BOP stack dimension parameters are used for modeling.Modeling is conducted based on the selection of Transocean’s BOP stack.Numerical simulations of the BOP stacks for different water depths and the corresponding seawater environment are conducted in the ANSYS fluid-structure interaction module.The results offer the subsea wellhead drag coefficient for different environments,which has a large deviation compared with that using traditional method.The subsea wellhead drag coefficient has significant correlation with the structure of the BOP stack and has a small relationship with the Reynolds number.That is,in a still water environment,the BOP stack drag coefficient may be approximately only related to its model number.The study can provide a reference for the mechanical analysis of subsea wellhead system.
作者
钟功祥
张言开
Zhong Gongxiang;Zhang Yankai(MOE Key Laboratory of Oil & Gas Equipment,Southwest Petroleum University)
出处
《石油机械》
北大核心
2019年第3期47-52,共6页
China Petroleum Machinery
基金
西南石油大学石油天然气装备教育部重点实验室2017年度开放课题"深海输流立管多因素联合作用下耦合振动与疲劳特性研究"(OGE201702-26)
关键词
水下井口系统
拖曳系数
阻力系数
流固耦合
防喷器组
subsea wellhead system
drag coefficient
resistance coefficient
fluid-structure interaction
blowout preventer stack
