13 1/2 in MDSiR613(342.9 mm)

Product ID: 66290A0001 ER 26547

Design Specifications

Total Cutters82
Rolling Cutter Count16
Cutter Size13mm (1/2 in), 16mm (5/8 in)
Face Cutters(16) 13mm, (19) 16mm
Gauge Cutters(6) 16mm
Cone Cutters(13) 16mm
Back-Up Cutters(16) 13mm, (12) 16mm
Blade Count6
Nozzles9 Standard Series 60N
Bit Connection6 5/8 Reg
Junk Slot Area, in238.354
GaugeLength: 3" Protection: Options Available
LengthMake-Up: 11.447 Overall: 16.385
Fishing NeckDiameter: 8 Length: 3.16

Operating Parameters

Bit SpeedSuitable for Rotary & PDM
Weight-on-Bit6,000 To 40,000 (lbs)
2,727 To 18,180 (daN)
3 To 18 (Tonnes)
Flow Rate galUs/min600 To 1200
Hydraulic Horsepower, HSI1 To 6
Recommended Make-up Torque47,300 To 47,800 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.

Low Exposure (MDOC – Managed Depth Of Cut) Cutter backing raised to minimize excessive depth of cut because of formation heterogeneity to reduce cutter loading and minimize torque in transitional drilling. Minimizes cutter breakage and extends bit life.