Product Description: The Zhengyuan SL400QS crawler-type water well drilling rig is an outstanding drilling equipment with excellent performance. It can reach a maximum drilling depth of 400 meters, with a drilling diameter range of 105-325mm, and can meet the requirements of different water well diameters. The recommended working air pressure is 1.2-3.5 Mpa, the air consumption is 16-55 m³/min, it is equipped with a 6-meter-long, 89/102mm-diameter drill pipe, with an axial