Under normal circumstances, it is necessary to change the hydraulic chuck to change the drill rod. What you want to achieve now is to directly replace the HQ with NQ drill rod without changing the hydraulic chuck to meet the requirement of quick rod change. right?
In general, the drill pipe is the need to change the hydraulic chuck, you now want to reach is in the case of not changing the hydraulic chuck, directly change HQ to NQ drill pipe, to meet the requirements of a quick change rod, right?
In general, changing the drill pipe requires changing the hydraulic chuck. What you want to achieve now is to directly change HQ into NQ drill pipe without changing the hydraulic chuck, so as to meet the requirements of rapid rod change, right?<br>