Annular drilling rig

The closing time of annular BOP preventers The main disadvantage of the annular preventer in a drilling rig is the time required to close it. The annular preventer takes three to ten times the fluid volum. [pdf]

Illustrated complete guide to Gaoping rock drill accessories

The longer your feed rail, the more important the addition of the energy chain becomes to the overall effectiveness of your machine. We offer a range of feed rail options from 6′ to 24′ for our Skid Steer and E. [pdf]