Mud cleaner is a combination of desander, desilter, and dewatering shale shaker. It is a compact design, small footprint, three-in-one unit widely accepted by nowadays drilling contractors.  It is often installed after the shale shakers where the sand trap drilling mud feeds into the desanders and desiters respectively, the underflow of hydro cyclones loads onto the dewatering screens for recycling the usefully drilling fluids back to the mud system. The drilled cuttings above the screens are therefore dried which lowers drilling cuttings disposal cost.