8 3/4 in MSiZ813(222.25 mm)

Product ID: 65590A0001 ER 25978

Design Specifications

Total Cutters63
Cutter Size13mm (1/2 in)
Face Cutters(29) 13mm
Gauge Cutters(7) 13mm
Cone Cutters(15) 13mm
Back-Up Cutters(12) 13mm
Blade Count8
Nozzles4 Standard Series 60N, 2 Standard Series 40N
Bit Connection4 1/2 Reg
Junk Slot Area, in28.856
GaugeLength: 2" Protection: Options Available
LengthMake-Up: 8.97 Overall: 13.158
Fishing NeckDiameter: 6 Length: 3.601

Operating Parameters

Bit SpeedSuitable for Rotary, Steerable Motor & Rotary Steerable BHA
Weight-on-Bit4,000 To 35,000 (lbs)
1,818 To 15,908 (daN)
2 To 16 (Tonnes)
Flow Rate galUs/min325 To 800
Hydraulic Horsepower, HSI1 To 6
Recommended Make-up Torque16,600 To 21,600 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.