8 3/4 in MDSiR813(222.25 mm)

Product ID: 66394A0001 ER 26620

Design Specifications

Total Cutters96
Rolling Cutter Count16
Cutter Size13mm (1/2 in)
Face Cutters(38) 13mm
Gauge Cutters(7) 13mm
Cone Cutters(11) 13mm
Back-Up Cutters(40) 13mm
Blade Count8
Nozzles3 Standard Series 60N, 8 Standard 13 Fixed Port
Bit Connection4 1/2 Reg
Junk Slot Area, in28.311
GaugeLength: 2" Protection: Options Available
LengthMake-Up: 9.161 Overall: 13.349
Fishing NeckDiameter: 6 Length: 3.541

Operating Parameters

Bit SpeedSuitable for Rotary and PDM
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 ONYX 360 rolling cutter feature allows the PDC element to rotate enabling the full circumference of the diamond edge to be utilized. This prevents a wear flat developing in only one place thereby maintaining cutter sharpness for improved drillbit durability.

Bit design is available with RockStorm PDC technology. These all-in-one cutters break the paradigm and provide ultimate wear resistance and ultimate impact resistance in the same PDC cutter. As a result, faster drilling rates are delivered while increasing overall run length.

The PX feature places thermally stable diamond inserts (TSP) on the gauge to maximize gauge retention and extend bit life.

Increased cleaning, cooling, and cuttings evacuation with available hydraulic flows; high flow rates with minimal increase in pump pressure, and reduced risk a bit balling.