短半径水平井钻柱强度和应力计算  

Calculations of Drill String Strength and Stress in Short Radius Horizontal Wells

作　　者：马善洲[1] 韩志勇[1] 

机构地区：[1]石油大学(华东)石油工程学院,山东东营257062

出　　处：《石油钻探技术》2002年第4期6-8,共3页Petroleum Drilling Techniques

摘　　要：短半径水平井中钻柱的受力和强度计算问题是一几何非线性和边界非线性相互耦合的双重非线性问题 ,推导了非线性梁单元的力与位移的关系 ,建立了空间梁单元切线刚度矩阵的精确表达式 ,给出了结合随动坐标系 (Co- rota-tion)对短半径水平井中钻柱的受力进行非线性有限元分析的步骤。实例计算分析了一口实钻短半径水平井 。Stress and strength calculations are key problems in short radius horizontal wells. They have dual nonlinear features combined with nonlinear geometric and boundary. An accurate tangent stiffness matrix is presented based on the derived relationships between force and deformation of non linear basic elements. The co rotation coordinate method was then taken to solve geometric non linear finite element problem. One case history shows that this method is feasible.

关 键 词：短半径 水平井 钻柱强度 应力 计算 石油钻井 钻柱力学 

分 类 号：TE243[石油与天然气工程—油气井工程] TE21