Conventional RC System
Dual-Wall Reverse Circulation Conventional Rotary System
This is the original RC with a conventional DTH hammer. An interchange sub, also referred to as a crossover sub, located above the hammer with a vertical slots to let the sample go into the center of the dual wall drill pipe. An interchange sub allows the down-the-hole hammer mechanism to continuously fire while reversing the flow of the drill cutting up the inner pipe.
Please choose below which parts of the Dual-wall reverse circulation rotary system you're intrested in: