提高钻杆接头螺纹强度的有效方法研究

Research on the Effective Means of Improving the Screw Strength of Drill Pipe Joint

摘要:

以接触非线性有限元理论为基础，建立了钻杆接头螺纹非线性有限元分析模型。运用大型通用有限元分析软件研究了钻杆接头螺纹外径对其强度的影响规律。研究结果表明，适当增大螺纹外径，可以有效改善接头螺纹内部的应力分布状态，接头螺纹整体强度提高约32%。

Abstract:

Based on the theory of contact non-linear finite element, the non-linear finite element analysis model of drill pipe joint screw was established, and the effect regular of external diameter of drill pipe joint on the its strength was researched by means of large general-purpose finite element analysis software .The result indicates that the ways of properly increasing the screw diameter can effective improve the stress distribution of the inner of joint screw, also the joint screw strength of drill pipe was increase 32%.