Threaded button bits are most popular drilling tools for customers worldwide. Like threaded cross bits, button bits also have cylinder type or retrac type
Blade bits are not as productive and yield higher drilling costs than button bits. In addition, blade bits generally require more frequent sharpening than button bits because of the less wear resistant carbide grades on the face.
Hammer bits are for water well drilling, oil & gas drilling, foundation engineering and construction related projects.
the characteristics of hard rock and hard-to-drill geology include:
Highly abrasive, Slow drilling, Interbedded formations ,Costly sections