... Well Drilling Machine 1,Full-hydraulic chuck 2,Widely used in exploration 3,Drilling rod diameter 50 HGY-300 Water Well ... road, port, bridge, water conservancy and hydropower, tunnel, well, industrial and civil construction, geological exploration, large diameter boring pile ... Technological Data of Drilling Rigs: ModelHGY-300 Water Well Drilling MachineDrilling depth( m)300Drilling rod diameter.(mm)Φ ...