The Foremost Dual Rotary drill features a unique lower rotary drive that is used to advance steel cashing through unconsolidated overburden, such as sand, gravel, glacial till, and boulders. Pullback, pulldown and rotational forces are effectively transmitted to the casing via high-strength steel jaws with carbide inserts. An independent rotary to-drive simultaneously handles a drill string equipped with a down-the-hole hammer, drag bit, or roller cone bit. Cuttings are typically evacuated with air, but the Foremost DR-drills can also be configured with pumps for mud or flooded reverse circulation drilling. The Top and lower drives feed independently, meaning that the bit position can vary relative to the bottom of the casing. Once the desired casing depth has been achieved, the DR continues drilling open-hole like conventional top-drive drill. With a Foremost DR-drill, there is no need to trip out or change tools when transitioning to open-hole drilling. The Foremost DR24 is a top-class rig that our crew has perfected their use of.