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孕镶人造金刚石钻头在弱研磨性的中硬以软的岩层中(如结晶灰岩、灰岩、白云岩及泥质页岩等)钻进,其小时效率比较低,一般在1.0～1.4米/时左右.当使用软胎体钻头钻进时,钻头寿命又较短;胎体稍硬一点(如HRC35以上),钻进效率又不高;胎体太硬(如HRC45以上)金刚石又不易被磨出刃来,以致出现所谓的“打滑”.根据上述情况,现场工人采用“硬磨软打”的方法,即在研磨性岩层中钻进一段,使钻头上的金刚石磨出刃来,然后在软岩中打进尺,这样既提高了钻进速度,又延长了钻头寿命.
Inlaid synthetic diamond bit in weakly abrasive hard rock (such as crystalline limestone, limestone, dolomite and shale shale, etc.) drilling, the hour efficiency is relatively low, usually in the 1.0 to 1.4 meters / Hour or so when the use of soft carcass bit drilling, the bit life is shorter; a little harder carcass (such as HRC35 above), drilling efficiency is not high; too hard carcass (HRC45 above) diamond is not easy So that the so-called “slippage” occurs.According to the above situation, the workers in the field adopt the method of “hard and soft blasting”, that is, drilling a section in an abrasive rock formation to cause the diamond on the drill bit to grind a blade and then Soft rock into the ruler, this will not only improve the drilling speed, but also extend the bit life.