WTZ—300 drilling rig has two functions of drilling with air and mud suitable for complex terrain, gobi and desert which can be mounted on Hongyan, MAN offroad vehicle or WTC5320TSM buggy. The rig has retractable rotary table with five speeds, two double-drum drawworks, rigid mast, hydraulic-chain feed pulldown system, powerful air compressor, mud pump and hydraulic-pneumatic control device. The rig is provided with four hydraulic leveling jacks. The rig is difficient and easy to be operated.
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