Main Features: 1.BZC-350A directional and reverse circulation construction and 2.The truck chassis adopts the 6X4 special crane chassis of brand DAYUTRUK, the main transmit, transmission power, gearbox, sets of windlass, mud pump, sewage pump,mast are set up on the chassis 3.The rig has directional and reverse circulation pump, it adopts slurry as the washing fluid, the directional circulation drilling and reverse circulation drilling can be switched by changing mud pump and sewage pump.