Schlumberger

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.

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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.