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在油井生产过程中管柱会受到各种载荷。管柱在轴向力作用时，在有外管壁或井壁约束的情况下，内管柱与外管壁或井壁间会产生接触压力，并可能发生螺旋屈曲，严重时会导致管柱失效。文中综述了一些学者的典型接触压力计算式，发现不同计算式间的计算结果差异很大。根据工程应用中的需要，进行了理论推导并首次对该问题作了实验检测，给出了三维光弹性应力冻结法的实验结果，探讨了管柱在屈曲时接触压力分布规律的三个阶段和工程应用的更接近实际的计算公式。在此基础上对前人所发表的不同接触压力表达式进行分析和探讨。为研究管柱屈曲时的受力情况和工程应用提供了理论与实验依据。
The string will be subjected to various loads during well production. When the axial force is applied to the pipe string, contact pressure may be generated between the inner pipe string and the outer pipe wall or the wall wall under the constraint of the outer pipe wall or the well wall, and the spiral buckling may occur, which may lead to the column Failure. In this paper, the typical contact pressure formulas of some scholars are summarized, and the results of calculation between different formulas are quite different. According to the needs in engineering application, theoretical derivation is made and the problem is experimentally tested for the first time. The experimental results of the three-dimensional photoelastic stress-freezing method are given. The three stages of the contact pressure distribution during the buckling are discussed. Engineering application of the more realistic calculation formula. On this basis, we analyze and discuss the different expressions of contact pressure published by our predecessors. It provides the theoretical and experimental basis for studying the stress situation and engineering application of tubular buckling.