12 1/4 in MDSiZ519(311.15 mm)

Product ID: 65735C0001 ER 26083

Design Specifications

Total Cutters50
Cutter Size19mm (3/4 in)
Face Cutters(22) 19mm
Gauge Cutters(5) 19mm
Cone Cutters(8) 19mm
Back-Up Cutters(15) 19mm
Blade Count5
Nozzles7 Standard Series 60N
Bit Connection6 5/8 Reg
Junk Slot Area, in234.332
GaugeLength: 3" Protection: Options Available
LengthMake-Up: 10.634 Overall: 15.572
Fishing NeckDiameter: 8 Length: 3.521

Operating Parameters

Bit SpeedRotary, Steerable PDM & Rotary Steerable
Weight-on-Bit6,000 To 40,000 (lbs)
2,727 To 18,180 (daN)
3 To 18 (Tonnes)
Flow Rate galUs/min500 To 1200
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 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.