How Baorui core barrel with roller bits work on hard rock project

Over the six years’ experience of manufacturing drilling tools, we have provided thousands of applicative tools solutions for various kinds of formation such as sandstone, limestone, mudstone, granite, basalt, and backstone .Among those cases, if ask where the formation is the toughest, it must be in Shenzhen and Guangzhou City,Guangdong province, of which the stratum is mainly the lightly weathered granite and some would be along with the solitary stone and the oblique rock.