8 3/4 in MSiZ516(222.25 mm)

Product ID: 66637A0001

Design Specifications

Total Cutters55
Cutter Size13mm (1/2 in), 16mm (5/8 in)
Face Cutters(19) 16mm
Gauge Cutters(7) 16mm
Cone Cutters(6) 13mm
Back-Up Cutters(23) 16mm
Blade Count5
Nozzles5 Standard Series 50N
Bit Connection4 1/2 Reg
Junk Slot Area, in214.094
GaugeLength: 2" Protection: Options Available
LengthMake-Up: 9.352 Overall: 13.54
Fishing NeckDiameter: 6 Length: 3.432

Operating Parameters

Bit SpeedSuitable for Rotary and PDMs
Weight-on-Bit4,000 To 32,000 (lbs)
1,818 To 14,544 (daN)
2 To 14 (Tonnes)
Flow Rate galUs/min500 To 590
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.

Bit design is available with advanced ONYX cutter technology. This includes the next generation ONYX II cutters that have superior abrasive wear and exceptional resistance to thermal degradation, enhancing cutter durability for increased footage drilled and faster ROP.

The Stinger element features a highly distinctive conical geometry with a thick synthetic diamond layer, engineered to resist high impact loads and abrasive wear for superior durability.

The center location of the Stinger conical diamond in the bit enhances its stability to mitigate whirl and other artifacts that waste energy and reduce ROP. The Stinger element also provides an efficient mechanism to drill the very center of the borehole.