... line core drilling and reverse circulation drilling, we have designed XY-4-3 spindle type core drilling rig. It is ... developed on XY-4 drill. The central opening dia of drill head ... Hole dia. (mm)300, 500, 1000Hole depth (m)200-400, 50-100, 25-50Hole dip angle (°):360Swivel Head (when power ... do not consider power losses. Water Well Drilling Rig XY-4-3A(HOT)