Gyd-20 drilling rig is a new product developed and designed by the company. Equipped with hydraulic feed system, it can realize adding and reducing pressure drilling, equipped with walking, tower lifting and shackle oil cylinder device, it can move, lift and drop the drill frame and unscrew the drill tool quickly. Using positive and negative circulation drilling technology, drilling in quaternary gravel formation and hard formation. It is mainly used for drilling all kinds of mine holes, such as rescue, conveying and ventilation holes, large diameter foundation pile holes for high-rise buildings and Bridges, and also for drilling large diameter Wells for industrial water or agricultural irrigation.