中国石油大学学报（自然科学版）2017，Vol.41Issue(2)：94-99,6.DOI:10.3969/j.issn.1673-5005.2017.02.011
一种利用岩石强度刻划试验确定岩石PDC钻头可钻性级值的方法
A new method for assessing rock's drillabity for PDC bits via a scratch testing
摘要
Abstract
A new method for assessing rock's drillabity for PDC bits via a scratch testing was proposed in coupling with the rock breaking mechanisms using micro PDC bits and scratch blades.In this study,a large numbers of micro PDC bit drilling and scratch testing experiments were conducted in order to establish the correlation of the crushing work ratio between the two types of rock breaking processes,and a new rock's drillability model for PDC bits was established based on the crushing work ratio of the rock scratch test.The new method can provide precise assessments of rock's drillability for PDC bits and is in consistency with the micro PDC bit testing.The scratch testing not only can capture the effects of intrinsic heterogeneity of rocks on drillability,but also can keep the integrity of the rock cores.关键词
刻划试验/PDC钻头/破碎比功/岩石可钻性级值/岩石破碎Key words
scratch test/PDC dill bit/crushing work ratio/rock's dillability/rock breaking分类
能源科技引用本文复制引用
陈军海,王怡,韩艳浓,曾义金,孙连环..一种利用岩石强度刻划试验确定岩石PDC钻头可钻性级值的方法[J].中国石油大学学报（自然科学版）,2017,41(2):94-99,6.基金项目
“十二五”国家重大专项(2011ZX05005-006) （2011ZX05005-006）
国家自然科学基金项目(51490653) （51490653）
