8 1/2 in Z8(215.9 mm)

Product ID: 66564A0001 ER 26763

Design Specifications

Total Cutters72
Total Stinger Element Count72
Stinger Element Size9/16
Cutter Size15mm (9/16 in)
Face Cutters(63) 15mm
Gauge Cuttersn/a
Cone Cutters(9) 15mm
Blade Count8
Nozzles4 Standard Series 50N, 8 Standard 11 Fixed Port
Bit Connection4 1/2 Reg
Junk Slot Area, in27.224
GaugeLength: 3" Protection: Options Available
LengthMake-Up: 10.028 Overall: 14.216
Fishing NeckDiameter: 6 Length: 3.333

Operating Parameters

Bit Speed140 To 300 RPM
Weight-on-Bit22,000 To 44,000 (lbs)
9,999 To 19,998 (daN)
10 To 20 (Tonnes)
Flow Rate galUs/min300 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.

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8 1/2 in Z8(215.9 mm)



Bit design and performance have been certified through the validation process prescribed by IDEAS simulation technology.

The Stinger's unique conical geometry delivers high point loading to fracture tough-to-drill formations more efficiently.

Placed on the blade, Stinger conical diamond elements offer improved impact resistance when drilling through inter-bedded formations or when hard inclusions such as chert or conglomerates are encountered.

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.

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.