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我们进行生产试验的某铁矿区，地层软硬变化较大，闪长岩与蚀变闪长岩、大型岩交替出现。在较致密的闪长岩中（可钻性8级左右），人造孕镶金刚石钻进的性能发挥的较好，金刚石钻进效率比钢粒钻进提高两倍；比用针状合金钻进提高一点五倍；比用普通硬质合金钻进提高五点八倍。金刚石钻进回次进尺比钢粒钻进提高一点二倍；比用针状合金钻进提高一点六倍；比用普通硬质合金钻进提高七倍。但在6级左右的蚀变闪长岩中，人造金刚石钻进无论是钻进效率，还是回次进尺，仍然比其他钻进方法优越。相反，在较软的5级大理岩中，由于岩石较软，人造孕镶金刚石钻头出刃微小，排粉不良，易造成蹩泵，至使钻进效率显著降低，不如表镶金刚石和合金钻进优越。（见表1）
In an iron ore district where we conducted production tests, the hard and soft strata of the strata changed greatly, and the diorites alternated with altered diorites and large rocks. In the denser diorite (drillability of about 8), the performance of artificial diamond impregnated diamond play well, diamond drilling efficiency than the three times to increase the drilling; than with needle alloy drilling Increased by 1.5 times; 5.8 times more than drilling with normal cemented carbide. The diamond footage returned twice as much as the steel grain; it was 1.6 times more than the needle alloy; it was seven times greater than that of ordinary carbide. However, in the 6th grade of alteration diorite, synthetic diamond drilling, whether drilling efficiency, or back to the footage, is still superior to other drilling methods. On the contrary, in softer Grade 5 marble, the artificial diamond-in-stone diamond drill has a small blade edge and poor discharge capacity, which may cause a bad pump, resulting in a significant reduction in drilling efficiency due to the softer rock. superior. (See Table 1)