6 1/8 in MDiR613(155.575 mm)

Product ID: 66663A0001 ER 26852

Design Specifications

Total Cutters28
Rolling Cutter Countn/a
Cutter Size13mm (1/2 in)
Face Cutters(18) 13mm
Gauge Cutters(6) 13mm
Cone Cutters(4) 13mm
Blade Count6
Nozzles3 Standard 11 Fixed Port, 3 Standard 12 Fixed Port
Bit Connection3 1/2 Reg
Junk Slot Area, in27.059
GaugeLength: 2" Protection: Options Available
LengthMake-Up: 8.344 Overall: 12.031
Fishing NeckDiameter: 4.5 Length: 3.302

Operating Parameters

Bit SpeedSuitable for Rotary Steerable & PDM
Weight-on-Bit1,200 To 22,000 (lbs)
545 To 9,999 (daN)
1 To 10 (Tonnes)
Flow Rate galUs/min100 To 400
Hydraulic Horsepower, HSI1 To 8
Recommended Make-up Torque6,600 To 9,850 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.

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