The?casing rotator?is a new type drill with the integration of the full hydraulic power and transmission, and the combination control of machine, power and fluid. It is a new, environmental and highly efficient drilling technology. In recent years, it is widely adopted in the projects such as the constructions of urban wubway, articulation pile of deep foundation pit enclosure, clearance of waste piles (undergroud obstructions), high-speed rail, road and bridge, and urban construction piles, as well as the reinforcement of reservoir dam.