6 1/8 in MSiZ513(155.575 mm)

Product ID: 65991A0001 ER 26291

Design Specifications

Total Cutters33
Cutter Size13mm (1/2 in)
Face Cutters(17) 13mm
Gauge Cutters(5) 13mm
Cone Cutters(2) 13mm
Back-Up Cutters(9) 13mm
Blade Count5
Nozzles5 Standard Series 50N
Bit Connection3 1/2 Reg
Junk Slot Area, in25.849
GaugeLength: 2" Protection: Options Available
LengthMake-Up: 8.223 Overall: 11.91
Fishing NeckDiameter: 4.75 Length: 3.454

Operating Parameters

Bit SpeedSuitable for Rotary & PDM
Weight-on-Bit2,500 To 19,000 (lbs)
1,136 To 8,636 (daN)
1 To 9 (Tonnes)
Flow Rate galUs/min150 To 300
Hydraulic Horsepower, HSI1 To 6
Recommended Make-up Torque6,600 To 9,850 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.

Bit design is available with ONYX fixed cutters for improved thermal stability in harder, more abrasive formations, resulting in greater wear resistance.