对金刚石钻头的合理使用及充分利用金刚石等问题尽管进行了许多科研、定额、技术组织等工作以及采取过措施,但至今未完全解决。尤其对表镶金刚石钻头的更换还缺乏明确的原则。对孕镶钻头比较清楚:使用到胎体工作层完全磨损为止。此时,当然要考虑胎体内、外径允许磨损量、水槽的最小允许深度、异常磨损的迹象、机械钻速的下降等。对表镶钻头,专家们意见不一致。大部分专家认为更换的依据是:钻头有肉眼能见的磨 The rational use of diamond bits and the full utilization of diamonds have not yet been fully solved, despite many studies, quotas, technical organizations and other measures taken. In particular, the replacement of watch set diamond bits is still lacking in clear principles. Precise drill bits on the pregnancy: the use of the carcass working layer is completely worn so far. At this point, of course, to consider the carcass, the outer diameter of the allowable amount of wear, sink minimum allowable depth, signs of abnormal wear and tear, the decline in ROP and so on. On the table inlaid bit, experts disagree. Most experts believe that the replacement is based on: the drill can be seen with the naked eye mill