复合管柱初始压缩量计算分析

摘要

Combined string is widely used in oil and gas well completion by packer,but the computing method of initial quantity of compression of single string is unsuited to the complex structure of combined string simply. This paper focuses on tri-combined string to calculate and locate the neutral point and then deduces the computational formula of initial quantity of compression in four cases classified by the different location of the neutral point. Finally takes combined string structure in some oil well for example,calculates initial quantity of compression of string affected by wellbore fluid,and provides data reference to field construction.%复合管柱在油气井封隔器完井工艺中应用广泛,由于其结构复杂,初始压缩量的计算不能单纯地采用单一管柱的计算方法.针对三级复合管柱,分析了坐封后中和点的位置,并依据此位置分4种情况推导了管柱初始压缩量的计算公式.以某油井复合管柱结构为例,计算了井筒流体作用下管柱的初始压缩量,为现场施工提供参考.