12 1/4 in MDiZ619(311.15 mm)

Product ID: 66089A0001 ER 26371

Design Specifications

Total Cutters38
Cutter Size19mm (3/4 in)
Face Cutters(22) 19mm
Gauge Cutters(7) 19mm
Cone Cutters(9) 19mm
Blade Count6
Nozzles6 Standard Series 60N
Bit Connection6 5/8 Reg
Junk Slot Area (sq in)31.757
GaugeLength: 3" Protection: Options Available
LengthMake-Up: 11 3/16 in Overall: 16 1/8 in
Fishing NeckDiameter: 8" Length: 3 1/2 in

Operating Parameters

Bit SpeedSuitable for Rotary & PDM
Weight-on-Bit4,000 To 35,000 (lbs)
1,818 To 15,908 (daN)
2 To 16 (Tonnes)
Flow Rate (GPM)500 To 1000
Hydraulic Horsepower (HSI)1 To 5
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 places thermally stable diamond inserts (TSP) on the gauge to maximize gauge retention and extend bit life.

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