12 1/4 in GFKi28(311.15 mm)

Product ID: 0059006030 ER 8244 IADC 527X

Design Specifications

Bearing TypeSpinodal™ 2 Bearing w/Silver Plated Components
Seal TypeGemini Twin High Temperature Seal System
Bit Connection Type6 5/8 Reg
Journal Angle (°)32.5
Offset (inches)0.375
RowsTotal: 13 Inner: 10 Gage: 3
Inserts/TeethTotal: 158 Inner: 104 Gage: 54

Operating Parameters

Weight on Bit15,000 To 60,000 (lbs)
6,818 To 27,270 (daN)
7 To 27 (Tonnes)
Rotary Speed (RPM)300 To 80
The operating parameters listed here are general parameters, please contact your local Smith Bits representative for precise recommendations for your individual well.



Binary carbide gauge places wear resistant semi-round top carbide inserts between the primary gauge inserts to enhance gauge retention in transitional drilling. This substantially improves gauge durability and allows longer in-gauge bit runs.

V-Flo™ directs nozzles to the leading side of the following bit cone to maximize cleaning. The resulting upward spiral flow enhances bottom hole cleaning, prevents bit balling and allows the bit to drill at maximum ROP.