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Down the hole hammer casing system - ø 139.7 - 193.7 mm | CDC series
Sandvik has introduced this CDC system for installing cases in natural formations and many types of overburdens. They can easily penetrate boulders as they make straight holes. They are designed to be used with permanent cases that undergo welding at the time of drilling and is then left in the hole. It is good to use for drilling and casing deeper holes as per the applications, conditions of the ground and the inclination of the hole. It has got assembly of ring bit and pilot bit in it. Casing shoe and the ring bit are connected with each other using a rotary joint. These components along with casings, drill pipes and DTH hammer make the system complete.