几种日本天然金刚石钻头的试验

总结了中日合作进行的几种天然金刚石钻头的试验成果,介绍了试验钻头的类型及主要结构参数,对同心圆矩形齿孕镶、多阶梯表镶和底喷式钻头的适岩性及钻进某些岩层效率较高的原因作了简要分析,并根据试验中发现的问题,提出了改善钻头水路系统排粉性能的意见。

The experiments on several Japanese natural diamond bits

The Paper summarizes the experiment rsults on several natural diamond bits used in Sino Japan cooperation projects,introduces the types and primary structure parameters,conducts a brief analysis on the adaptability of concentric circles rectangle gear impregnated,multi step surfaceset and spraying bits and the drilling efficiency in some lithologic formations,and put forward the suggestions on improving powder discharge capability of bits water circulation system based on the problems found during experiments.