9 7/8 in R616(250.825 mm)

Product ID: 66866A0001 ER 26971

Design Specifications

Total Cutters74
Rolling Cutter Count14
Cutter Size16mm (5/8 in)
Face Cutters(27) 16mm
Gauge Cutters(6) 16mm
Cone Cutters(10) 16mm
Back-Up Cutters(31) 16mm
Blade Count6
Nozzles6 Standard Series 60N
Bit Connection6 5/8 Reg
Junk Slot Area, in217.407
GaugeLength: 3" Protection: Options Available
LengthMake-Up: 11.929 Overall: 16.867
Fishing NeckDiameter: 7.5 Length: 4.632

Operating Parameters

Bit SpeedSuitable for Rotary & PDM
Weight-on-Bit5,000 To 30,000 (lbs)
2,272 To 13,635 (daN)
2 To 14 (Tonnes)
Flow Rate galUs/min400 To 850
Hydraulic Horsepower, HSI1 To 6
Recommended Make-up Torque47,300 To 47,800 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 RockStorm PDC technology. These all-in-one cutters break the paradigm and provide ultimate wear resistance and ultimate impact resistance in the same PDC cutter. As a result, faster drilling rates are delivered while increasing overall run length.