... speed. 3,Utility patent 5,Full hydraulic rig Exploration Drilling Rig(HGY-1500T) Brief introduction: 1.32 years professional ... Iran, South Korea, Costa Rica etc.Features of Exploration Drilling Rig(HGY-1500T):1) Wide range of suitable rotary speed ... work are performed by the hydraulic system. Use of Exploration Drilling Rig(HGY-1500T): for geotechnical investigation, exploring, prospecting, water ...