一、概述以往对于钻进硬或坚硬岩层的金刚石钻头进行了不少工作，而且取得了很大成绩。但对于适用于钻进软—中硬岩层的金刚石钻头，进行的工作不多。尤其是采用金刚石钻进软岩，仅限于使用价格较高的天然金刚石表镶钻头。这不仅资源紧缺，而且也不适应金刚石钻探新形势的要求。因此，立足于国内资源，充分利用现有的人造金刚石粉末烧结体研究和制造钻 I. OVERVIEW Much work has been done in the past on diamond bits drilled into hard or hard rock formations and great achievements have been made. However, little work has been done on diamond bits suitable for drilling soft-medium hard formations. In particular, the use of diamond drilling soft rock, limited to the use of higher prices of natural diamond table set bit. This is not only a shortage of resources, but also does not meet the requirements of the new situation of diamond drilling. Therefore, based on domestic resources, make full use of the existing artificial diamond powder sintered body research and manufacture of drilling