Sand pump is widely used in solids control system. Internal the mud system, It can be located before the de-sander, de-silter and mud cleaner to transfer the drilling mud to the cyclone unit, equipped to the jut mud mixer unit as the mud mixing pump. For external of the mud system, the Sand pump can be used as the trip pump for mud supplement under well and the supercharging pump to transfer the drilling fluids to high pressure rig mud pump. The solids contained in drilling fluids request the Sand pump wet contacting parts with excellent wear resistance and high efficiency on flow rate. Based on the material adopted and structure design.