8 1/2 in Z816(215.9 mm)

Product ID: 66900A0001 ER 26990

Design Specifications

Total Cutters51
Total Stinger Element Count34
Stinger Element Size9/16 in
Cutter Size16mm (5/8 in)
Face Cutters(27) 16mm
Gauge Cutters(8) 16mm
Cone Cutters(8) 16mm
Back-Up Cutters(8) 16mm
Blade Count8
Nozzles8 Standard Series 50N
Bit Connection4 1/2 Reg
Junk Slot Area, in28.778
GaugeLength: 2" Protection: Options Available
LengthMake-Up: 9.22 Overall: 13.408
Fishing NeckDiameter: 6 Length: 3.603

Operating Parameters

Bit Speed140 To 300 RPM
Weight-on-Bit18,000 To 35,000 (lbs)
8,181 To 15,908 (daN)
8 To 16 (Tonnes)
Flow Rate galUs/min300 To 800
Hydraulic Horsepower, HSI1 To 6
Recommended Make-up Torque13,700 To 22,900 pound ft
The operating parameters listed here are general parameters, please contact your local Smith Bits representative for precise recommendations for your individual well.



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.

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.

Placing thermally stable diamond inserts (TSP) on the gauge maximizes gauge retention and extends bit life.