311.1mm (12 1/4 inches) Reverse Circulation Tricone Bit for Water Well Drilling

311.1mm (12 1/4 inches) Reverse Circulation Tricone Bit for Water Well Drilling. Specially designed through bore for reverse circulation with large central flow path. Cuttings return upward directly through the inner bore of the bit for fast cuttings removal. Standard IADC214 milled-tooth roller cones equipped with roller bearings and rubber seals. The aggressive tooth profile achieves excellent penetration performance in medium-soft formations . The bit nozzle inner diameter is 60 mm and the shank inner bore is 70 mm. The flow channel features smooth transition to lower circulation resistance and ensures sufficient cuttings carrying capacity.