Stress Distribution Formula of Threads Casing Joint Under Symmetrical Load

doi:10.16182/j.issn1004731x.joss.201810050

Abstract

Abstract: While itis difficult tomeasure thestress distribution of casing threads underground without calculation by finite element method. Here assumes a deformation compatibility factor U_x, use an initial calculation to represent the thread stress, f(x)=f₀U_x, and applythe ABAQUS finite element software to calculate the stress distribution of the threads under different symmetrical loads. Obtain the expressions of U_x by curve fitting, and get the threads stress calculation formula to provide an intuitive, fast and accurate method of calculation for the site. Providea theoretical reference for development and manufacture of casing joint. The research indicates: the deformation compatibility factor of casing threads don’t change with the size of the load under a singlesymmetrical load, but it has a small amount of volatility under the complex symmetrical load.

Key words: casing joint, symmetrical load, threads stress, deformation compatibility factor, finite element, calculation formula

CLC Number:

TP391.9

Tong Hua, Tang Xiaohong, Zhu Xiaohua, He Huan, Tao Haoran. Stress Distribution Formula of Threads Casing Joint Under Symmetrical Load[J]. Journal of System Simulation, 2018, 30(10): 4014-4020.

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