IADC 412
Size 10 5/8 in (270 mm )
Type 10 5/8 K412
Drilling Applications
- Drilling operations in coal mine.
- Applicable for drilling Soft with low compressive strength and high drill ability, such as shale, soft limestone, soft sandstone, rudaceous clay, soft dolomite, salt bed and coal bed, etc.
Design Specifications
Bearing type Roller-Ball-Roller-Thrust button
Cutting structure Tungsten Carbide Inserts:
Inner Rows and Nose Rows Conical Inserts
Gauge Rows Conical Inserts
Product weight 74 kgs
Pin connection 6 5/8 API Reg
Operating Parameters
Weight on Bit 15000-50000 lbs
Rotary Speed 60~150 RPM
