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KW20 geotherm water well multifunction drilling rig is a lightweight, efficient, multi-function device of surface drill rig, which is mainly applied to drill water wells, agricultural irrigation wells, geothermal air conditioners hole and other uses of the well hole . This drilling rig can drill in the different stratum.the hole diameter can up to 254mm..This rig adopts the new type of hydraulic technology,matching a high torque hydraulic rotary motor and big diameter hydraulic cylinder propel,famous factory engine provide the powered for hydraulic system,two stage air filter and air compressor inlet design,prolong the service life of diesel energy.Especial pump team design for easy maintenance,reduce the cost of maintenance.Centralized control of the hydraulic control console,easy operation.This drilling rig using engineering machinery dedicated crawler underpan,good cross-country performance,independent module design,can install this drilling rig on a truck, increase its maneuverability. Combined type of locator,can according the different model of drill rod and DTH hammer to adjust and change the positioning tray,guarantee positioning centering are accurate and reliable.Winding gear convenience drill rod and DTH hammer lifting, reduce the labor intensity.