... widely used in deep well drilling, bridge, mining, port, and dam based water well construction. This water well drilling rig has advantages ... in the cabin. MAIN SPECIFICATION Max. drill hole diameter: 19.68in(500mm)Max. drill hole depth: 492ft(150m)Derrick height: ... include Workover rig, drilling rig, live well service rig, No Guyline well service rig, water well drilling rig, core drilling rig, sand ...