管柱卡点计算公式及应用

Pipe String Stuck-point Calculating Equations and Their Application

对在井中被卡的单一管柱和组合管柱分别进行了受力分析 ;采用提升法 ,依据虎克定律 ,应用微积分理论 ,分别推导出了单一管柱和组合管柱的卡点计算公式 ;实例表明 ,应用该卡点计算公式得到的卡点深度与实际卡点深度误差很小。

Force summing analyses are made respectively on a single pipe string and a combined string stuck in wells Calculating equations are derived for the single pipe string and combined string by using the theory of differential and integral calculus based on a lifting method and Hook's law The case study shows that the depth of calculated stuck point obtained with the equations has less errors with that of the real stuck point