Product Description
The 6–12 in insert tricone family covers 152.4–304.8 mm for water-well and oil-and-gas drilling. Three rolling cones and insert teeth let the bit address formation changes by selecting an allowed IADC structure. This reviewed product uses IADC 447 for medium formation. Compare its water-well role in the water-well drilling archive and the assigned rock class in the medium formation archive.
The filename explicitly lists 6, 8, and 12 sizes, insert construction, and use in water and oil wells. The body is recorded as steel with tungsten-carbide inserts and three cones. It does not state an API Reg connection, bearing, seal, or nozzle arrangement, so those fields remain unfilled. Confirm the marking on the selected diameter before assembly. IADC 447 is permitted for medium insert service; a different formation would require a code from the appropriate allowed group. Store each diameter as a separate controlled item because cone size, connection, and supported assembly cannot be inferred safely from the family name alone.
Run at 3,000–8,000 lbf/in of bit diameter and 60–120 RPM. Do not treat the upper ends as automatic targets; use torque, penetration, and returned chips to balance loading. The project provides no tricone flow number, so circulation cannot be specified from the PDC 8.5 in reference. The IADC supplies classification context. This family is limited by actual tooth, cone, and bearing condition. A restricted cone or chipped insert calls for inspection rather than additional weight. Log cone condition separately. Measure every cone at recovery.
