旋转导向万向节接触特性分析
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中图分类号：TE921文献标识码：A DOI：10.12473/CPM.202506049
Contact Properties the Universal Joint in Rotary Steering System
Hu Hai1Zhang Yulin²Guan Feng1Lü Cheng1Wu Yuxiang1Zhang Chuxiong1 （1.ScholEnginering，YangtzeUniversity;.Oilfeldechologystitute，hinaOilfeldcsL
Abstract：With the rapid advancement petroleum exploration technology，moreand more complexstructure well types have appeared.To make up the shortfalls in conventional directional driling technology，the rotary steering driling technology hasemerged.Theuniversal joint in the dynamic point-the-bit rotary steering system bears alarge torque when working in harsh downhole environment，leading to the concentration contact stress，which willinduce structuralfailureand cause the problem driling reliability.Inthis study，taking the universal joint in the dynamic point-the-bit rotary steering system as an example，and considering the structural characteristics thechannel surface therzeppa constant-velocityuniversal joint，theinfluences diferent channel shapes and structural parameters on the contact stress universal joints were identified by combining finite element analysis and response surface methodology，and the finite element analysis method was verified by comparison.Then，the Box-Behnken design was used to systematicalyquantify the interactions multiple channel parameters，and a quadratic regresion model was constructed to explore the interactions curvature coeficient，sphere diameterand contact angle with the contact stress inner and outer rings.The optimization results showthat theeliptical channel has good curvature continuityand can be processed more easily，with the contact stress distribution being about 18% lower than that the circular arc channel. The optimal parameter combination can reduce the maximum contact stress the outer ring the universal joint to 554MPa ，which is about 31% （20 lower than the initial value.This confirmsthat a rational matching curvature coefficient and contact angle can remarkably improve the stressconcentration.The study reveals thequantitative relationship between channel parametersand stressdistribution，which provides a theoretical basis for the design high-loaduniversal joints and has certain guiding significance for improving the downhole working life rotary steering systems.
Keywords： point-the-bit；rotary steering system；universal joint；contact stress；response surface methodology;channel parameters; curvature coefficient
0 引言
近年来，油气勘探技术发展迅速，同时也面临诸多挑战。（剩余10732字）