【摘要】 本文通过建立和求解杆（管）柱在水平井眼中的正弦屈曲方程，进一步分析了不同边界条件下，杆柱临界失稳载荷因子β０与杆柱长度因子α０之间的关系．杆柱在水平井眼中的稳定性取决于载荷因子β、长度因子α０及端部的约束条件．当β＜１时，柱杆不会发生失稳．当α０＜３，临界失稳载荷因子β０对边界约束条件较为敏感；当α０＞５时，β０对端部的约束条件不敏感．更多还原

【Abstract】 y deriving and solving the equation of pipe buckling in horizontal wells, the relationship between pipe critical buckling force factor & and pipe length factor α0 is investigated under different boundary conditions. The stability of pipe in horizontal wells depends upon the force factor 5,length factor ac and the boundary conditions at both ends. The pipe keeps stable when α<1. The critical force factor & is sensitive to boundaryconditions when ac<3 and nonsensitive when α0>5.更多还原