绳索取心钻杆丝扣结构力学仿真分析

Simulation Analysis on Structural Mechanism of the Thread for Wire-line Drill Pipe

以Φ89 mm绳索取心钻杆为分析研究对象,对其连接丝扣部分建立准三维模型,运用CAE有限元软件ANSYS对其进行接触非线性力学分析,得出钻杆连接丝扣处等效应力及变形云图,结果显示最大等效应力出现的位置及变形状态与钻探现场钻杆常见断裂位置及形态完全一致,表明所采用的研究手段和方法切实可行。

Take 89mm wire-line drill pipe as the research object, a quasi three dimensional model of the threaded connec-tion part is established, with the analysis on the contact nonlinear mechanics by using CAE finite element software ANSYS, the equivalent stress and deformation nephogram at the threaded connection of drill pipe are obtained.The results show that the maximum equivalent stress position and deformation state is exactly consistent with the common position and the state of the drill pipe fracture in the drilling field, which shows that the above research means and methods presented in this paper are feasible.