摘要
采用现代CAE技术进行了螺杆钻具水帽的结构力学和流体动力学分析,通过分析获知:在额定工况下水帽的静安全系数较高,内部流体最大流速主要集中在传动轴顶部螺纹处。结合现场失效情况和理论分析,提出了增大水帽入口流道流入角(<90°)的改进措施,经计算,采用改进后的结构可以较好地缓解水帽腔体、传动轴顶部螺纹、传动轴上部腔体的冲蚀情况,从而提高了螺杆钻具整体的使用寿命。
Computational Fluid Dynamics （CFD） analysis and structure optimization on drive shaft connector of mud motor is conducted using modern Computer Aided Engineering （CAE） techniques. The analysis indicates that the connector＇s static safety factor is relatively high, and the maximum fluid velocity is focused on top screw thread of transmission-shaft. Combined the failure condition and theory analysis, the increase of in- flow angle （〈90°） of entrance was proposed. The calculation indicates that the improved structure has better performance in inhibition of corrosion on drive shaft connector chamber, top thread, and upper chamber which prolongs longevity of mud motor.
出处
《石油钻探技术》
CAS
北大核心
2008年第2期51-53,共3页
Petroleum Drilling Techniques
基金
中国博士后科学基金项目“基于钻井系统动力学的螺杆钻具力学特性分析及参数匹配研究”(编号:20060391034)部分研究内容
关键词
螺杆钻具
水帽
结构力学
流体动力学
冲蚀作用
screw drill tool
drive shaft connector
structural mechanics
dynamics
washing action
