Schlumberger

8 1/2 in Z319S(215.9 mm)

Product ID: 66782A0001 ER 26916


Design Specifications

Total Cutters22
Total Stinger Element Count7
Stinger Element Size9/16 in
Cutter Size16mm (5/8 in), 19mm (3/4 in)
Face Cutters(8) 19mm
Gauge Cutters(6) 19mm
Cone Cutters(6) 16mm, (2) 19mm
Blade Count3
Nozzles8 Standard Series 60N
Bit Connection4 1/2 Reg
Junk Slot Area, in218.979
GaugeLength: 2" Protection: Options Available
LengthMake-Up: 8.441 in Overall: 12.63 in
Fishing NeckDiameter: 6 in Length: 2.847 in

Operating Parameters

Bit Speed140 To 300 RPM
Weight-on-Bit4,000 To 30,000 (lbs)
1,818 To 13,635 (daN)
2 To 14 (Tonnes)
Flow Rate galUs/min325 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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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.