我队近来多系深孔作业，电测组没有800米以上的电缆，不能解决深孔电测工作，无法使用无岩心钻进，且岩层较硬（砂岩及砂砾岩——六级以上），效率低，纯钻时间少，大大影响生产。队生产技术组及时研究了这种情况，采用取心三翼钻头，经试验效果良好，在010号钻机806孔709多米孔深的六级岩层钻进，效率与无岩心三翼钻头相仿，岩心采取率达 Recently, our team has been engaged in deep hole operation. There is no cable above 800 meters for the electric test set. It can not solve the deep hole electric test, and can not be drilled without core and the rock is hard (sandstone and conglomerate - grade 6 or above) Low efficiency, less drilling time, greatly affect the production. Team production technology group in a timely manner to study this situation, the use of coring trifoil drill, the test results are good, drilling in the No.106 hole 809 hole drilling depth of 709 meters six rock drill, the efficiency of non-core three-wing drill bit similar core Take rate up