IADC 7-1-2
SIZE:10 5/8IN (270 mm)
Drilling applications:
Drilling operations mainly in coal mine and copper mine.
applicable for drilling soft formations with low compressive strength,such as shale, medium shale, limestone,marble with gneiss,etc
Design specifications:
Bearing type: Roller-ball-roller-thrust button
Cutting structure: Tungsten Carbide Inserts
` Inner Rows and Nose Rows: Conical Inserts
` Gage Rows: Wedge Inserts
Product Weight: 74 kg
Pin Connection: 6 5/8 API Reg
Operating Parameters:
weight on bit: 850000-35000 lbs
Rotary Speed: 50-90 RPM
