8 1/2 in FHKi50YSD1V(215.9 mm)

Product ID: 0061529010 ER 7815 IADC 637Y

Design Specifications

Bearing TypeSpinodal* 2 Bearing w/Silver Plated Components
Seal TypeHigh Temperature Fabric Competent Seal
Bit Connection Type4 1/2 Reg
Journal Angle (°)36
Offset (inches)0.031
RowsTotal: 16 Inner: 13 Gage: 3
Inserts/TeethTotal: 174 Inner: 128 Gage: 46

Operating Parameters

Weight on Bit20,000 To 50,000 (lbs)
9,090 To 22,725 (daN)
9 To 22 (Tonnes)
Rotary Speed (RPM)80 To 250
The operating parameters listed here are general parameters, please contact your local Smith Bits representative for precise recommendations for your individual well.


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

The geometry of conical inserts is optimized to reduce insert breakage and maximize ROP in WOB sensitive formations.

SD1 features 100% premium material diamond heel rows with shaped diamond gauge geometry inserts. Diamond enhanced heel inserts maximize ROP in soft to medium soft extremely abrasive applications.

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.