It is a common puzzle in geological drilling: why can certain diamond bits achieve a drilling depth of 800 meters in identical rock formations, while others can only drill no more than 300 meters? The performance gap has almost no connection with brand popularity. Instead, it all boils down to the rationality of the bit matrix design and selection.

Diamond core bits serve as the core working equipment for borehole construction, playing an irreplaceable role for drilling contractors, geological exploration teams and mining engineering practitioners. Nevertheless, most purchasers tend to prioritize procurement cost and brand influence when selecting bits, overlooking the core engineering factor that dominates actual drilling efficiency and service life — targeted structural design for different rock formations.

This professional technical manual differs from conventional product brochures. It is compiled to provide practical technical guidance for engineers to select ideal hot-pressed diamond core bits for various drilling projects. No matter the construction scenarios include hard granite, cracked limestone or loose sand layers, the professional principles and selection methods summarized in this article can effectively help enterprises boost core recovery rate, prolong the service cycle of drilling bits, and ultimately cut down the comprehensive drilling cost per meter.