| 水平井中钻柱屈曲的非线性有限元分析 |
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| 引用本文： | 刘峰,王鑫伟.水平井中钻柱屈曲的非线性有限元分析[J].机械科学与技术(西安),2005,24(8):917-920. |
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| 作者姓名： | 刘峰 王鑫伟 |
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| 作者单位： | 南京航空航天大学,结构强度研究所,南京,210016;南京航空航天大学,结构强度研究所,南京,210016 |
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| 基金项目： | 美国Smith Tool公司和中国博士点基金项目（20020287003）联合资助 |
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| 摘 要： | 建立了直井中钻柱屈曲的平衡方程及对应的泛函表达式,使用有限元法对不同约束下水平井中钻柱从稳定到非线性屈曲的整个过程进行了分析。力学模型中考虑了重力和扭矩对屈曲的影响。分析结果表明:钻柱的屈曲是一个从局部屈曲到总体屈曲的过程,屈曲段的井壁约束力、钻柱弯矩和屈曲位移呈周期性变化;重力在水平井中对屈曲有较强的抑制作用;边界约束对屈曲的影响不可忽略;扭矩对屈曲的影响很小,可以忽略。
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| 关 键 词： | 水平井 钻柱 屈曲 非线性 有限元分析 |
| 文章编号： | 1003-8728（2005）08-0917-04 |
| 收稿时间： | 2004-03-02 |
| 修稿时间： | 2004-03-02 |
Nonlinear Finite Element Analysis of Tubing Buckling in Horizontal Wells |
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| Liu Feng;Wang XinWei.Nonlinear Finite Element Analysis of Tubing Buckling in Horizontal Wells[J].Mechanical Science and Technology,2005,24(8):917-920. |
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| Authors: | Liu Feng;Wang XinWei |
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| Abstract: | The equilibrium equations and the potential energy function of tubing buckling in arbitrary straight wells were derived. The whole buckling process of tubing in horizontal wells under different boundary conditions was analyzed by finite element method. The effects of gravity and torsion on the buckling were considered in the analyses. It is shown that the tubing experienced a buckling process from local buckling to globe buckling with the increase of buckling load, and the contact force of the wells, the bending moment of the tubing and the buckling displacement vary periodically. The gravity of tubing can strongly weaken the buckling of tubing. The effects of boundary conditions on buckling can not be neglected. The influence of the torque on buckling is very small. |
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| Keywords: | Horizontal wells Drill-string Buckling Nonlinear finite element analysis |
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