... horizontally extendable. Moreover, the 4 legs can be controlled and adjusted either independently or simultaneously, which allows operators to ... driving system, transfer case, gearbox, dual-winch, mud pump, sand pump, and drill tower, etc. are all mounted on the ... drilling rigs are able to drill into hard mud rock and strongly wheathered soils, and more. Drilling depth (M)150Borehole diameter (mm ...