摘要
为了描述钻柱与井壁的接触摩擦非线性问题,构造了多向接触摩擦间隙元,并进行了理论公式推导,把多向接触摩擦间隙元与梁单元相结合,建立了钻柱接触和几何非线性有限元分析方法.经大庆油田GP1水平井应用表明,该方法能够求出钻柱在不同井深处的接触摩阻力,其井口悬重计算误差低于10％,为钻柱设计和现场施工提供了可靠的理 论依据。
In order to describe the nonlinear contact between drillstring and hole wall, the multi-directional contact gap element (MCGE) is constructed and its formulas are derived. Through the MCGE connection with the beam element, the contact and geometric nonlinear finite element of drillstring is obtained in this paper. The application of this method to the GP1 well in the Daqing oil field shows that the contact friction force of the drillstring at any well depth can be obtained and the calculating error of the hole top load is below 10%. The results may provide a theoretical basis for the design and operation of drillstring.
出处
《力学与实践》
CSCD
北大核心
2003年第4期45-47,共3页
Mechanics in Engineering
基金
国家"九五"科技攻关项目(95-108-04-02-4)资助
