摘要
应用热弹性力学理论分析了由钻井液循环温度变化引起的井壁围岩定常热弹应力和非定常热应力的变化规律。指出热应力是井眼失稳的重要因素，而要增加井眼稳定性，就要尽量避免中断钻井液循环，这对深井钻井安全作业具有一定的指导意义。
The changing pattern of sidewall determinate and indeterminate thermal stresses caused by the change of drilling fluid circuluting temperature are analyzed.The paper points out that thermal stress is an important factor of hole stabilization.To improve hole stability,drilling fluid must keep running during drilling,which is of same significance for safety during deepwell drilling operation.
出处
《石油钻探技术》
CAS
北大核心
1997年第4期13-15,共3页
Petroleum Drilling Techniques
关键词
围岩
钻井工艺
热应力分析
深井钻井
deep drilling,surrounding rock,stability,thermal stress,circulating temprature,drilling fluid circulatation,thermal elastic mechnics
