During the process of trenchless construction,it is often inconvenient due to the bit water waymatching the pump output inappropriate.

在实际非开挖施工过程中,由于扩孔钻头水眼大小与泵量不能够很好地匹配,给正常施工带来很大的不便。

Application of reaming while drillingtools in Shengli Oilfield;

胜利油田随钻扩眼工具及其应用

Aiming at safe and high effective borehole enlargement issue of deep well,ultra-deep well and high pressure oil/gas well in drilling operation,actual force behaviors of drilling string assembly reaming while drillingin downhole are researched,by using tri-axial finite element approach twisting vibration of reaming drill string while drilling is simulated.

针对深井、超深井、高压油气井等钻井作业中安全高效的扩眼问题,研究随钻扩眼钻具组合在井下的实际受力情况,对随钻扩眼钻进钻柱扭转振动进行了三维有限元模拟,提出了研究扩眼器的质量偏心、钻机顶部支撑等因素对扭转振动作用的力学分析模型,并讨论了随钻扩眼钻具组合的扭转振动频率和动力学强度等力学问题。