1978年以来,我队曾先后采用人造金刚石孕镶钻头和聚晶钻头进行钻进,由于现场所用钻机转速低,试验效果不明显。加上勘探区硬岩少、层薄,软硬互层,必须与合金钻头交替使用,所以冲孔、捞砂等工序占用时间较多。为了适应煤田钻探的现有条件,在金刚石钻头结构方面进行了一些摸索,设计了人造金刚石孕镶胎块胶粘钻头(下称胎块钻头)。 Since 1978, our team has successively used artificial diamond inlaid drill bits and polycrystalline drill bits for drilling. Due to the low speed of drilling rig used on site, the test results are not obvious. Coupled with the exploration area less hard rock, thin layer, hard and soft layer, and the alloy drill must be used interchangeably, so punching, sanding and other processes take more time. In order to adapt to the existing conditions of coalfield drilling, the diamond bit structure has been explored, artificial diamond inlay block adhesive drill (hereinafter referred to as the drill bit).