8 3/4 in R516(222.25 mm)

Product ID: 66854A0101 ER 26965

Design Specifications

Total Cutters45
Rolling Cutter Count11
Cutter Size16mm (5/8 in)
Face Cutters(24) 16mm
Gauge Cuttersn/a
Cone Cutters(7) 16mm
Back-Up Cutters(14) 16mm
Blade Count5
Nozzles5 Standard Series 60N
Bit Connection4 1/2 Reg
Junk Slot Area, in216.588
GaugeLength: 2" Protection: Options Available
LengthMake-Up: 9.881 Overall: 14.069
Fishing NeckDiameter: 6 Length: 3.891

Operating Parameters

Bit SpeedSuitable for Rotary & PDM
Weight-on-Bit4,000 To 25,000 (lbs)
1,818 To 11,362 (daN)
2 To 11 (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 PX feature places thermally stable diamond inserts (TSP) on the gauge to maximize gauge retention and extend bit life.

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.