HF bit for hard formations

Petroleum exploration has been developed to deep formations gradually, in deep formations (compact plastic mudstone, lava and granite etc.,), low ROP restrict the economic of development in deep well or super-deep well. Failure types, such as tooth break, tooth wear, cone tip wear and bit diameter shrink etc., usually appear when conventional cone bits drill in hard formations. So we have developed HF series bit for hard formations through analyze and research these failure