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Bit Size 8 1/2”(215.9mm)
Bit Connection 4 1/2”
IADC Code: S223
Blade Count 5pcs
Primary Cutter 19mm
Nozzles 6pcs
Junk Slot Area (in2) 13.8
Bit Rotary Speed (rpm) 60~260
Weight-On-Bit (KN) 25~105
Flow Rate (lps) 22~35
Application

Soft formation of low resist compression strength, high drillability, such as shale, clay, rock salt, cotton rock 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
• The PX feature places thermally stable diamond inserts (TSP) on the gauge to maximize gauge retention and extend bit life.
• Bit design is available with premium fixed cutters and tungsten carbide rock drill bit for improved thermal stability in harder, more abrasive formations, resulting in greater wear resistance.