The CH series drilling rig is designed specifically for large-diameter pile foundations. The entire series of drilling rigs are equipped with automatic horizontal lifting function and rich configurations. The power head pressurization system can be configured as oil cylinder pressurization or winch pressurization. The CH series is a multifunctional drilling rig that is suitable for various drilling processes such as grinding resistance drill rods, machine lock drill rods, CFA long screws, displacement piles, or mixing pile construction.