1·Study on rock mechanics of deep wellbore, especially on rock drillability and rock anisotropy is a key project to resolve the problems of deep or ultra-deep well drilling.
深部井眼岩石力学的研究，特别是深部井眼岩石可钻性和岩石各向异性的研究，是解决深井、超深井钻井关键技术的重要课题。
2·It is possible to use the parameter integrated RMS to assess rock indentation hardness and further to predict rock drillability.
有可能利用积分rms这一参数来估价岩石压入硬度，并进一步预报岩石可钻性。
3·The study of Rock drillability and blastibility is a basic topic in the fields of drilling and blasting, it has important practical meaning also.
岩石可钻性和可爆性研究是凿岩爆破领域的基础性课题，同时也具有重要的实际意义。
4·There is stress concentration near borehole wall, where rocks drillability gets worse. It is explained that the side of PDC bits is easy to be damaged.
靠近井壁区域存在应力集中现象，岩石可钻性变差，这是PDC钻头外侧易损坏的原因。
5·This method was applied to predict the formation drillability of Fugu1Well in Changqing Oilfield.
应用该方法对长庆油田富古1井的地层可钻性进行了预测。