Drilling Fluids Circulation System consists of basis systems: purification, circulation, mixing mud, weighting, measurement, and grouting mud. The system is equipped with five-class purification equipment. With the convenient transportation and setting, sold control equipment and other connecting pipes are made of modular. Drilling Fluids Circulation System is mainly used to complete the drill rigs of ZJ70, ZJ50, ZJ40, ZJ30 and ZJ20.