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Bit Size 8 1/2”(215.9mm)
Bit Connection 4 1/2”
IADC Code: M433
Blade Count 7pcs
Primary Cutter 13mm
Nozzles 6pcs
Junk Slot Area (in2) 21.2
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