涡轮钻具作为能满足深地高温钻井的动力钻具，推力轴承寿命短是影响钻井效率的关键问题。以涡轮钻具中四支点接触球轴承为研究对象和提升其服役寿命为研究目标，基于正交试验设计方法和有限元数值模拟方法，选择滚动体直径、接触角、球组节圆直径三组变量为设计参数，进行了不同结构参数和磨粒磨损寿命之间的正交试验，采用极差分析法确定轴承的最优结构参数。并建立了轴承磨损的温度-位移耦合有限元模型，考虑轴承的摩擦生热，研究了轴向载荷、温度和磨损次数对轴承磨损深度的影响规律。研究结果表明：最优结构参数轴承整体性能提升，缓解了轴承的应力集中情况，减少了轴承的磨损量，优化后结构寿命比初始寿命提高了4.6%。本文方法为该类轴承优化设计提供参考价值。同时分析了不同工况条件对轴承磨损的影响。随着轴向载荷的增大，轴承磨损深度增加；随着磨损次数的增大，磨损深度也呈现增大的趋势；随着井底温度升高，磨损深度先减小后逐渐增加。

As a power drilling tool that can meet the needs of deep ground and high temperature drilling, the short life of thrust bearing is a key problem affecting drilling efficiency. Based on the CCD design method and finite element numerical simulation method, three sets of variables were selected as the design parameters, the orthogonal test between different structural parameters and abrasive wear life was carried out, and the optimal structural parameters of the bearing were determined by the range analysis method. The temperature-displacement coupling finite element model of bearing wear was established, and the influence of axial load, temperature and wear times on the wear depth of the bearing was studied considering the frictional heat generation of the bearing. The results show that the overall performance of the bearing with optimal structural parameters is improved, the stress concentration of the bearing is alleviated, the wear of the bearing is reduced, and the optimized structural life is increased by 4.6% compared with the initial life. This research method provides a reference value for the optimal design of this type of bearing. At the same time, the influence of different working conditions on bearing wear was analyzed. With the increase of axial load, the wear depth of the bearing increases. With the increase of the number of wear, the wear depth also shows an increasing trend. With the increase of bottom hole temperature, the wear depth decreases first and then increases gradually.