基于LAGRANGE方程的深水钻井隔水管–水下井口系统动力分析  

LAGRANGE equation-based dynamics analysis of deepwater drilling risersubsea wellhead system

作　　者：马永乾 赵鹏[1] 畅元江[2] 王仕超 张晏铭 MA Yongqian;ZHAO Peng;CHANG Yuanjiang;WANG Shichao;ZHANG Yanming(Drilling Technology Research Institute of Shengli Petroleum Engineering Company Limited,SINOPEC,Dongying 257000,China;Centre for Offshore Engineering and Safety Technology,China)

机构地区：[1]中国石化胜利石油工程公司钻井工艺研究院,山东东营257000 [2]中国石油大学(华东)海洋油气装备与安全技术研究中心,山东青岛266580

出　　处：《应用科技》2024年第1期151-157,共7页Applied Science and Technology

基　　金：国家自然科学基金面上项目(52071337)。

摘　　要：为了探究大质量、大刚度防喷器组(blowout preventers,BOPs)对深水钻井隔水管系统动态相应预测精度的影响,根据细长钻井隔水管与刚性防喷器组的结构特点,提出两者刚柔耦合的概念,采用能量法推导隔水管–防喷器组–水下井口系统的动能和势能,采用LAGRANGE方法建立耦合系统动力学理论模型,采用科学计算软件和Newmark-β直接积分法对动力学模型进行数值计算。以南海某深水钻井隔水管为例,开展基于耦合动力学模型的隔水管系统动态响应分析。结果表明,采用本文理论模型得到的隔水管不同位置的节点位移、单元弯矩、上部和下部挠性接头转角时程曲线、整体侧向位移包络线和弯矩包络线等与ABAQUS仿真结果均吻合良好,最大误差为8.8%。此方法可为深水钻井隔水管和水下井口系统动态分析提供参考。In order to explore the influence of large mass and stiffness blowout preventers(BOPs)on corresponding prediction accuracy of deepwater drilling riser system dynamics,this paper proposes the rigid-flexible coupling concept of riser and BOPs according to the structural characteristics of riser and BOPs,deriving the potential and kinetic energies of the riser-BOPs-subsea wellhead by the energy method.The theoretical model of the coupled system is established based on LAGRANGE,and the numerical calculation is conducted by employing the Newmark-β direct integration method based on science computation software.Taking the riser system of a deepwater well in the South China Sea as an example,the dynamic response analysis of the drilling riser based on the coupled dynamics model was carried out.The research showed that the established theoretical model and ABAQUS finite element model agreed well with each other in terms of time histories of nodes displacements and elements bending moments of three different positions along the risers,the upper and lower flex-joints rotation angles,as well as the global lateral dynamic displacement and bending moment envelopes of the deepwater risers,with the maximal error of 8.8%.This method could be used to provide references for dynamic analysis of deepwater drilling riser and subsea wellhead.

关 键 词：深水钻井隔水管 水下井口 防喷器组 刚柔耦合 有限元分析 动力分析 LAGRANGE方程 Newmark-β积分法 

分 类 号：TE21[石油与天然气工程—油气井工程]