摘要
为解决钻具连接螺纹在交变弯曲应力作用下的疲劳失效问题,研究设计了具有新型连接螺纹减应力区的配合接头,即在配合接头本体上设置减应力结构来降低连接螺纹部位的应力水平。通过有限元计算与分析,得到应力释放效果最好的是母线为椭圆线的减应力结构。评价分析了减应力区开口位置、宽度和深度等参数对应力释放效果和配合接头强度的影响。
To solve the problem of the fatigue failure of the drilling tool threads under the action of cyclic bending stress, a novel stress relief groove is designed to reduce the stress on the threaded connections of a sub. By means of FEA, it is concluded that the stress relief groove with an elliptical generatrix has the best effect of stress relief. The influences of the location, width and depth of the stress relief groove on the stress relief and sub's strength are analyzed as well.
出处
《石油机械》
北大核心
2003年第5期9-10,32,共3页
China Petroleum Machinery
基金
中国石油天然气集团公司"九五"科研项目"钻柱动力学研究与现场应用"的研究内容
并获国家专利
专利号:ZL 01 2 47316.2
关键词
新型
连接螺纹
减应力区
石油钻具
配合接头
疲劳失效
有限元分析
fatigue failure threaded connection stress concentration stress relief groove finite element analysis
