A complete line from 3 7/8'' (98mm)~26''(660mm);
IADC code in all sizes and in stocks;
Used for oil/water well, mining, etc;

 

1.Suitable for medium soft formation with very hard abrasive streaks(hard  
   shale,mudstone,soft limestone,etc.).

2.This series bits adopt sealed journal bearing, which can drill stably with high   
   rotary speed. Compared withconventional sealed bit, its service life can be increased 
   with proper drilling parameters.

3.Two rings are used to form a metal face sealed bearing of bit.

4.New type of grease is used which can resist high temperature.