石油钻采工艺2012，Vol.34Issue(1)：23-27,5.
连续管伸长量分析
Elongation analysis of coiled tubing
摘要
Abstract
It is easy for Coiled Tubing (CT) to deform a plastic elongation because of many factors, such as the residual stress etc, in the process of coiled tubing service. The paper analyses the cause of coiled tubing plastic elongation and explains the principle of the same elongation. Coiled tubing plastic elongation has four mainly reasons: axial load causes plastic elongation, thermal causes plastic elongation, pressure difference causes plastic elongation, helical buckling causes elongation. The theoretical calculation formula and calculation method for CT plastic elongation are summarized. Calculation examples about CT plastic elongation give some basic CT plastic elongation conclusions by comparative analysis of relation curve on calculated value. The CT plastic elongation is more complicated and more obvious than conventional tube. The elongation caused by axial load and the shortening caused by helical buckling are larger than others and should be focused on the need to consider in the progress of coiled tubing service. The thermal expansion and the elongation caused by pressure difference are smaller than above all and should be given due consideration in the progress of coiled tubing service. Total elongation deformation is made up of four parts: the plastic elongation caused by axial load, thermal expansion, plastic elongation caused by pressure difference and the shortening caused by helical buckling. The four elongations may cancel partially each other, so the total elongation deformation generally is smaller than every single elongation.关键词
连续管/管柱力学/残余应力/轴向载荷/螺旋屈曲/伸长量Key words
coiled tubing/ pipe string mechanics/ residual stress/ axial load/ helical buckling/ elongation分类
能源科技引用本文复制引用
侯学军,高德利..连续管伸长量分析[J].石油钻采工艺,2012,34(1):23-27,5.基金项目
国家科技重大专项课题"复杂结构井优化设计与控制关键技术"(编号:2009ZX05009-005)资助. （编号:2009ZX05009-005）
