... 1,Full-hydraulic chuck 2,Widely used in exploration 3,Drilling rod diameter 50 HGY-300 Water Well Drilling MachineIt ... projects e.g. prospecting, railway, road, port, bridge, water conservancy and hydropower, tunnel, well, industrial and civil construction, ... shifting structure. Technological Data of Drilling Rigs: ModelHGY-300 Water Well Drilling MachineDrilling depth( m)300Drilling rod diameter.(mm ...