12 1/4 in SDiZ419(311.15 mm)

Product ID: 66131A0001 ER 26406

Design Specifications

Total Cutters29
Cutter Size19mm (3/4 in)
Face Cutters(17) 19mm
Gauge Cutters(4) 19mm
Cone Cutters(8) 19mm
Blade Count4
Nozzles6 Standard Series 60N
Bit Connection6 5/8 Reg
Junk Slot Area (sq in)31.76
GaugeLength: 3" Protection: Options Available
LengthMake-Up: 11 1/4 in Overall: 16 3/16 in
Fishing NeckDiameter: 7 7/8 in Length: 3 7/16 in

Operating Parameters

Bit SpeedRotary Steerable BHA
Weight-on-Bit6,000 To 35,000 (lbs)
2,727 To 15,908 (daN)
3 To 16 (Tonnes)
Flow Rate (GPM)500 To 1200
Hydraulic Horsepower (HSI)1 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 Stinger element features a highly distinctive conical geometry with a thick synthetic diamond layer, engineered to resist high impact loads and abrasive wear for superior durability.

The center location of the Stinger conical diamond in the bit enhances its stability to mitigate whirl and other artifacts that waste energy and reduce ROP. The Stinger element also provides an efficient mechanism to drill the very center of the borehole.

The PX feature extends PDC bit life by reinforcing its gauge areas with diamond-enhanced inserts (DEI) set in highly wear-resistant tungsten carbide.

Bit design is available with ONYX fixed cutters for improved thermal stability in harder, more abrasive formations, resulting in greater wear resistance.