| 下部钻具组合的几何非线性分析 |
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| 引用本文： | 王永岗,吕英民,蔡强康.下部钻具组合的几何非线性分析[J].中国石油大学学报(自然科学版),1993(1). |
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| 作者姓名： | 王永岗 吕英民 蔡强康 |
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| 作者单位： | 甘肃工业大学机设系
(王永岗)，石油大学机电系
(吕英民)，石油大学机电系(蔡强康) |
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| 摘 要： | 根据虚位移原理推导了两结点三维直梁单元几何非线性的单元切线刚度矩阵,建立了下部钻具组合(BHA)有限元分析的基本方程,考虑了井壁对下部钻具组合的约束,对BHA受力和变形问题进行了静力线性及非线性有限元分析,编制了相应的程序.利用该程序,计算和分析了曲率及钻压对钻头侧向力的影响及其非线性效应,得到了有关影响规律.
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| 关 键 词： | 钻具组合 非线性方程 切线刚度矩阵 井眼曲率 有限元法 |
GEOMETRICALLY NONLINEAR ANALYSIS OF BOTTOM HOLE ASSEMBLY |
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| Wang Yonggaug Lu Yingmin Cai Qiangkang.GEOMETRICALLY NONLINEAR ANALYSIS OF BOTTOM HOLE ASSEMBLY[J].Journal of China University of Petroleum,1993(1). |
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| Authors: | Wang Yonggaug Lu Yingmin Cai Qiangkang |
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| Abstract: | The tangential stiffness matrixes for two nodal three-demensional beam elements have been derived based on the principle of vertual displacements and taking into account of the geometrically nonlinear effects. By taking the well wall constraint to the bottom hole assembly (BHA) into consideration, the basic formulas for BHAa finite element analysis have been set up and used to calculate and analyze the force and deformation in BHA for both static geometrically linear and nonlinear cases. The corresponding computer program is developed. This paper studies the effects of hole curvatures and WOB on the bit side forces and the nonlinear effects. |
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| Keywords: | Bottom hole assembly Nonlinear formulas Matrixes: Hole curvature Finite elemente method |
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