12 1/4 in Z319S(311.15 mm)

Product ID: 66860A0001 ER 26962

Design Specifications

Total Cutters25
Total Stinger Element Count10
Stinger Element Size9/16 in
Cutter Size19mm (3/4 in)
Face Cutters(12) 19mm
Gauge Cutters(3) 19mm
Cone Cutters(10) 19mm
Blade Count3
Nozzles6 Standard Series 60N
Bit Connection6 5/8 Reg
Junk Slot Area, in232.775
GaugeLength: 4" Protection: Options Available
LengthMake-Up: 11.912 in Overall: 16.851 in
Fishing NeckDiameter: 7.88 in Length: 3.448 in

Operating Parameters

Bit Speed140 To 300 RPM
Weight-on-Bit6,000 To 35,000 (lbs)
2,727 To 15,908 (daN)
3 To 16 (Tonnes)
Flow Rate galUs/min500 To 1200
Hydraulic Horsepower, HSI1 To 6
Recommended Make-up Torque40,670 To 50,750 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.