高温对油管屈曲变形的影响

Influence of High Temperature on Strings Helical Buckled in Vertical Wells

用解析法建立管柱下放时的轴向力表达式,得出轴向力极限值。以此为基础,分析管柱升温时的轴向力和变形,确立计算步骤和边界点的处理方法。根据这些方法编制了数值计算软件,给出了简例计算结果。

Analytic solution is established to describe axial force distribution of strings helical buckled in vertical wells when slack down from the top. When temperature increases, deformation will develop under post buckling conditions, and it is difficult to describe axial force with analytic method, so numerical method is used. Near the point where well diameter changes, high temperature causes a sharp leap of load, local friction will turn direction to keep the continuity of axial force.