ST-200 portable water well drilling rig equipped with BW-160 mud pump and 22HP diesel engine, Max. drilling depth can be 230m with the opening diameter of 75-400mm, trailer, crawler, and tractor chassis for choice. a. the machine is equipped with crawler chassis device, easy to move with fast speed. b. hydraulic oil pressure feed device, improve drilling efficiency. c. pressure gauge display the condition of the bottom of the drill hole. d. drill mast controlled by hydraulic cylinder, improve the efficiency diesel engine adopt the electric starter, to reduce the labor intensity.