Desander is the combination of desander and shale shaker. The main body can be separated into two parts, the above part is the hydrocyclone and the bottom is the circular vibration shale shaker. The vibration is driven by a vibration motor to keep the whole screen box a forward circular track vibration.

The mud produces some pressure and speed when it passes the centrifugal pump, and flows into the hydrocyclone along the wall, the bigger solid particles sink spirally under the force of gravity and centrifuge, and to be discharged from the bottom flow hole and load on the micromeshsieve for the separation.

The other particles rise along the spiral of hydrocyclone, flow into the third class separation equipment for a further cleaning treatment from the overflow hole. The above procedure guarantees the mud can be well handled in the next equipments and decrease the workload.