8 1/2 in MDSiZ713(215.9 mm)

Product ID: 65866A0001 ER 26186

Design Specifications

Total Cutters72
Cutter Size13mm (1/2 in)
Face Cutters(31) 13mm
Gauge Cutters(10) 13mm
Cone Cutters(7) 13mm
Back-Up Cutters(24) 13mm
Blade Count7
Nozzles7 Standard Series 50N
Bit Connection4 1/2 Reg
Junk Slot Area, in210.488
GaugeLength: 2" Protection: Options Available
LengthMake-Up: 9.267 Overall: 13.455
Fishing NeckDiameter: 6 Length: 3.293

Operating Parameters

Bit SpeedRotary Steerable BHA and Downhole Motors
Weight-on-Bit4,000 To 35,000 (lbs)
1,818 To 15,908 (daN)
2 To 16 (Tonnes)
Flow Rate galUs/min300 To 800
Hydraulic Horsepower, HSI1 To 6
Recommended Make-up Torque16,600 To 21,6000 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.