8 3/4 in MDSiR616(222.25 mm)

Product ID: 66080A0001 ER 26362

Design Specifications

Total Cutters63
Rolling Cutter Count11
Cutter Size16mm (5/8 in)
Face Cutters(22) 16mm
Gauge Cutters(6) 16mm
Cone Cutters(8) 16mm
Back-Up Cutters(27) 16mm
Blade Count6
Nozzles6 Standard Series 60N
Bit Connection4 1/2 Reg
Junk Slot Area, in211.228
GaugeLength: 2" Protection: Options Available
LengthMake-Up: 9.2 Overall: 13.388
Fishing NeckDiameter: 6 Length: 3.601

Operating Parameters

Bit SpeedSuitable for Rotary & PDM
Weight-on-Bit4,000 To 26,000 (lbs)
1,818 To 11,817 (daN)
2 To 12 (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.

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

SHARC high-abrasion-resistance cutting structure provides two rows of cutters for superior stability and durability, and allows the bit to drill at maximum ROP for longer periods of time.