干钻采取岩心是苏联钻探先进经验之一。于钻进一般较软岩层时,它能提高岩心采取率,减少并避免岩心脱落。今将此法介绍如下。一钻具的接绩:干钻法所用钻具的接续,与一般钻进不同,它是用短的岩心管接续出刃尺寸大的合金钻头(钻头出刃尺寸,以能从井壁管内通过为限,愈大愈好),其短岩心管的长度,以 Dry drilling to take the core is one of the Soviet advanced drilling experience. As it drills a generally softer rock formation, it increases the core take-up rate and reduces and avoids core shedding. This method is introduced below. The performance of a drill: dry drilling method used to connect the drill, and general drilling is different, it is a short core tube to follow the edge of a large size alloy drill bit (drill bit size, to be able to pass from the wall tube limit , The bigger the better), its short core tube length to