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Bit Size 8 1/2”(215.9mm)
Bit Connection 4 1/2”
IADC Code: M433
Blade Count 8pcs
Primary Cutter 16mm
Nozzles 5pcs
Junk Slot Area (in2) 20.9
Bit Rotary Speed (rpm) 60~260
Weight-On-Bit (KN) 25~100
Flow Rate (lps) 28~32

Application

Hard formation of high abrasiveness, Such as hard limestone, dolomite, blaize, flint and so on.

Feature

Balanced force design of spiral blades endows the bits with good orientation,little radial vibration as well as ability to increase cutter placement.

The reasonable layout of patented PDC cutters in various structures at different locations endows the bits with strong aggressiveness and anti-abrasiveness.

Strong aggressiveness allows the bits high ROP.

The simulation technology of dynamic flow field are used in hydraulic design to optimize down-hole flow field,beneficial to improve clearance speed and anti-balling simultaneously.

Lower than standard nozzle count.Reduced nozzle count to best match drilling, formation, and hydraulic system capabilities; reduces the flow rate required to achieve an appropriate hydraulic horsepower per square inch (HSI); avoids the use of numerous, smaller nozzles that can become plugged.