Schlumberger

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.

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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.