DZS-380 well drilling rig is a light, efficient, crawler-type rig, which is mainly used in water and heat exploration. The rig can be ... used in DTH drilling work. Lifting the drilling rig, drill pipe loading and unloading, turning and feeding, legs, winch, ... be fixed with the rig body when rig is working, which can drilling, ensure job stability. uniquely designed drill-centering device, combined ...