摘要
以曲率半径法描述井眼轨迹的空间形态,从空间杆单元入手,建立细长杆的有限元模型,并考虑井眼轨迹多支点的几何约束,以迭代法循环求解每一结点抽油杆柱的空间载荷及变形,再结合细长杆的屈曲模型,分析比较不同位置安放扶正器后抽油杆柱空间构形的变化。结果表明,通过计算实际井眼轨迹中抽油杆柱的三维受力及变形屈曲状态,能够判断扶正器安放的合理性,掌握杆柱的工作状况,预测杆/管偏磨位置。
The wellbore trajectory was described by the radius of curvature method,and a finite element model of slender rod was established and solved by the curnode iterative method.The node force and deformation of sucker rod strings also could be obtained by this method with the consideration of multi-supports geometric constraints.Then the differences of spatial configuration of rod strings with various fixation patterns of centralizer were compared.The results show that the eccentric wear position of sucker rod strings and fixation patterns of centralizer could be determined by the solution of 3D configuration of sucker-rod strings in wellbore.
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第3期72-75,共4页
Journal of China University of Petroleum(Edition of Natural Science)
基金
国家自然科学基金项目(50874071)
上海市科委重点科技攻关计划(071605102)
上海市教委科研创新项目(08ZZ45)
上海大学研究生创新基金项目
关键词
抽油杆柱
计算方法
空间形态
径向位移
间隙
sucker rod strings
calculation method
space configuration
radial displacement
clearance
