The drill-strings are slender structures, with length reaching several kilometers.They transfer rotary motion to the......

本文通过对荣华二采区10...

该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......

A theoretical model is developed for the vibration and stability of a vertical pipe subjected concurrently to two depend......

建立了等曲率井中有重钻柱屈曲的平衡方程及对应的泛函表达式,用有限元法对等曲率井中有重钻柱屈曲过程进行了分析,给出了钻柱正弦......

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......

处于在边界随机刺激下面的飞机紧张状态的压电的厚壳的随机的反应与压电的圆柱的壳被学习并且说明。为电的潜力的微分方程放射状地......

In drilling field, stick-slip vibrations of the drill-string are the main reason for the failure of the drilling system.......