12 1/4 in MSiZ616(311.15 mm)

Product ID: 65671A0001 ER 26036

Design Specifications

Total Cutters86
Cutter Size16mm (5/8 in)
Face Cutters(37) 16mm
Gauge Cutters(8) 16mm
Cone Cutters(8) 16mm
Back-Up Cutters(33) 16mm
Blade Count6
Nozzles6 Standard Series 60N
Bit Connection6 5/8 Reg
Junk Slot Area, in229.872
GaugeLength: 3" Protection: Options Available
LengthMake-Up: 12.695 Overall: 17.633
Fishing NeckDiameter: 8 Length: 4.171

Operating Parameters

Bit SpeedRotary Steerable BHA and Downhole Motors
Weight-on-Bit5,000 To 45,000 (lbs)
2,272 To 20,452 (daN)
2 To 20 (Tonnes)
Flow Rate galUs/min500 To 1200
Hydraulic Horsepower, HSI1 To 6
Recommended Make-up Torque47,300 To 47,800 pound ft
The operating parameters listed here are general parameters, please contact your local Smith Bits representative for precise recommendations for your individual well.



The Stinger element features a highly distinctive conical geometry with a thick synthetic diamond layer, engineered to resist high impact loads and abrasive wear for superior durability.

The center location of the Stinger conical diamond in the bit enhances its stability to mitigate whirl and other artifacts that waste energy and reduce ROP. The Stinger element also provides an efficient mechanism to drill the very center of the borehole.

The PX feature places thermally stable diamond inserts (TSP) on the gauge to maximize gauge retention and extend bit life.

Low Exposure (MDOC – Managed Depth Of Cut) Cutter backing raised to minimize excessive depth of cut because of formation heterogeneity to reduce cutter loading and minimize torque in transitional drilling. Minimizes cutter breakage and extends bit life.