AG-Itator水力振荡器及其在我国的试验应用

Experimental Application of AG- Itator Hydraulic Oscillator in China

在非常规油气藏三维井眼轨迹水平井钻进过程中,托压效应严重制约着钻井提速。水力振荡器能通过产生轴向振动减小钻具与井壁之间的摩阻,显著减小托压效应,从而达到钻井提速的目的。介绍了AG-Itator水力振荡器的工作原理、性能以及在我国多个地区的试验应用效果。试验应用表明,使用AG-Itator水力振荡器能够显著提高机械钻速,进而缩短钻井周期,是非常规油气藏三维井眼轨迹水平井钻井提速的一种有效手段,值得推广应用。

In the drilling process of horizontal well with three-dimensional trajectory of unconventional reservoirs,the drilling speed is seriously restricted by the backing pressure effect. Hydraulic oscillator can generate axial vibration to reduce the friction between string and hole and significantly reduce the backing pressure influence so as to achieve the fast drilling.This paper introduces the working principles and performance of AG- Itator hydraulic oscillator as well as the test application effects in a variety of areas of China. It is showed that by the application of AG- Itator hydraulic oscillator,ROP can be significantly increased with shortened drilling cycle,which is an effective method to increase drilling speed for horizontal well with three-dimensional trajectory of unconventional reservoirs and is worth popularization and application.