6 1/8 in R509(155.575 mm)

Product ID: 66861A0001 ER 26956

Design Specifications

Total Cutters43
Rolling Cutter Count5
Cutter Size9mm (3/8 in), 11mm (7/16 in), 13mm (1/2 in)
Face Cutters(19) 9mm, (9) 11mm, (5) 13mm
Gauge Cutters(5) 9mm
Cone Cutters(5) 9mm
Blade Count5
Nozzles2 Standard 16 Fixed Port, 3 Standard 15 Fixed Port
Bit Connection3 1/2 Reg
Junk Slot Area, in28.192
GaugeLength: 2" Protection: Options Available
LengthMake-Up: 8.094 Overall: 11.781
Fishing NeckDiameter: 4.5 Length: 3.302

Operating Parameters

Bit Speed100 To 300 RPM
Weight-on-Bit1,200 To 16,000 (lbs)
545 To 7,272 (daN)
1 To 7 (Tonnes)
Flow Rate galUs/min200 To 400
Hydraulic Horsepower, HSI0 To 0
Recommended Make-up Torque5,700 To 10,500 pound ft
The operating parameters listed here are general parameters, please contact your local Smith Bits representative for precise recommendations for your individual well.



The PX feature places thermally stable diamond inserts (TSP) on the gauge to maximize gauge retention and extend bit life.

The ONYX 360 rolling cutter feature allows the PDC element to rotate enabling the full circumference of the diamond edge to be utilized. This prevents a wear flat developing in only one place thereby maintaining cutter sharpness for improved drillbit durability.

Bit design is available with advanced ONYX cutter technology. This includes the next generation ONYX II cutters that have superior abrasive wear and exceptional resistance to thermal degradation, enhancing cutter durability for increased footage drilled and faster ROP.