六牙轮取心钻头采用滚动方式破碎岩石,硬质合金齿不易过热,工作效能良好。本文重点介绍了该类型钻头的技术参数、结构特点及在现场的试验情况。试验证明,这种钻头是用于中硬以上地层较理想的取心钻头。文章也指出了这种产品有待改进的几个问题。 Six-round cone-core drill bits broken rock by rolling, hard alloy teeth is not easy to overheat, work well. This article focuses on the type of drill bit technical parameters, structural characteristics and test conditions in the field. Test proved that this drill bit is more ideal for hard rock formations above the bit. The article also pointed out that this product needs to be improved several issues.