6 5 8 reg saver sub

...Saver Sub 6 5/8 REG Product Introduction Saver Sub is used to extend the life of the Kelly by taking the connection wear each time it is make-up to a drill stem component. The saver sub connection is sacrificed because it can be easily repaired or inexpensively replaced. The saver sub......

...Reg - NC46 Crossover Sub For Connect Water Well Tricone Drill Bit And Drill Pipe Description of crossover sub: Crossover sub is mainly used to connect upper and lower drill tools in different connectors in drilling operations. Also it can be used to protect other tooling in drill stem (called saver sub) or be used to deliver outgoing air to the bit face just above the bit (called bit sub). The length of crossover subs......