Portable Water Well Drilling Rig XY-2B Large Hole Drilling Rig is especially available ... Water Well Drilling Rig XY-2B Large Hole Drilling Rig XY-2B drill rig derived from xy-2 drill rig, it ... not only keeps all performances of xy-2 drill, but also adds spindle inner hole diameter ... , highway, railroad and harbor etc. In common with xy-2 drill in all design but hydraulic chuck and rotary ...