... 437, 517, 537, 617, 637,737,827 TypeTri-cone bits, Steel tooth bits, PDC bits Applicablewater well, oil field, construction, geothermal, directional boring ... carbide inserted tricone bit),both of which are used for mining pilling, water well drilling or oil well drilling2,Model: ... in high bit penetration rates.the deep intermesh of cutter rows prevents bit bailing in sticky formations.TCI 517 medium ...