These systems are used for pure rotary drilling in unison with basic rotary drill rods or casings. Based on the geological conditions at hand, either a rotary head for soft rock conditions, or an additional down-the-hole (DTH) hammer for hard rock conditions is applied, respectively
These drilling systems are used for all types of rocks using basic drill rods and a DTH hammer.
The design oft he drill bits can vary. They are used to drill various kinds of hard and sometimes abrasive rock types.