Drilling mud from rig overhead manifold flow to shale shaker, mud cleaner，the cuttings processed by shaker and mud cleaner is transferred by screw conveyor to vertical cutting dryer. 
The solids processed by Vertical cutting dryer is discharged from solids discharge port, get recycled mud in mud recycling tank, which is pumped by centrifuge feeding pump to decanter centrifuge, the separated solids is discharged from centrifuge solids discharge port, the clean mud come back to solids control system.