... in exploration 3,Drilling rod diameter 50 HGY-300 Water Well Drilling MachineIt is widely used in the construction ... the 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 ...