8 1/2 in FHKi69UYODVPS(215.9 mm)

Design Specifications

Bearing TypeSpinodal™ 2 Bearing
Seal TypeHigh Temperature Fabric Composite Seal
Bit Connection Type4 1/2 Reg
Journal Angle (°)n/a
Offset (inches)n/a
RowsTotal: 17 Inner: 14 Gage: 3
Inserts/TeethTotal: 191 Inner: 146 Gage: 45

Operating Parameters

Weight on Bit30 To 60 (lbs)
14 To 27 (daN)
To (Tonnes)
Rotary Speed (RPM)110 To 50
Recommended Make-up Torque12,000 to 16,000 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 geometry of conical inserts is optimized to reduce insert breakage and maximize ROP in WOB sensitive formations.

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.

The PS feature offers strategically placed clusters of semi-round top (SRT) shaped carbide inserts that maximize leg protection, prevent bit wear, and substantially increase bit life in abrasive formations.

Advanced fabric composite seals and specialized high temperature grease designed with improved heat and wear resistance to enhance bit life at elevated temperatures.

100% diamond enhanced heel row inserts provide maximum durability in extremely abrasive applications. The bit will drill longer intervals of full gauge hole, and eliminate the need for expensive reaming operations.