Due to the different purposes and construction objects of geotechnical drilling and excavation works, there are more types of drilling rigs. Drilling rigs can be categorized according to their uses, such as core drilling rigs, oil drilling rigs, hydrogeological survey and water well drilling rigs, engineering geological survey drilling rigs, trench drilling rigs and engineering construction drilling rigs. According to the drilling method can be divided into four categories of drilling rigs: impact drilling rigs, which are also divided into two types of drilling rigs: wire rope impact and drill pipe impact. Rotary drilling rigs, and is divided into the following three types: vertical shaft-type one-handed feed type, spiral differential feed type, hydraulic feed type drilling rigs; rotary disk type - steel rope plus decompression type, hydraulic cylinder plus decompression type drilling rigs; mobile rotary device type - full hydraulic power head type, mechanical power head type drilling rigs. Vibratory drilling rigs. Composite drilling rigs: drilling rigs in which the functions of vibration, impact, rotary and hydrostatic pressure are compounded together in different combinations.
