Screw Conveyor is called Auger Conveyor, in oilfield drilling waste management, it is widely used for drilling cuttings transfer to feed to the drilling cuttings dryer.

Normally, totally 3 screw conveyor are needed for the drilling cuttings dryer system.
Two screw conveyors will be deployed between the mud cleaner and shale shaker and the vertical cuttings dryer unit to transport drilled cutting discharged from the rig shakers and the mud cleaner to the drilling cuttings dryer. The length of the first screw conveyor depends on the mud tank solids control equipment layout, normally 25 meters is required for the 3 shale shaker and 1 mud cleaner drilling cuttings discharge.

The third screw conveyor is required to remove the processed dry  cutting from  Vertical cuttings dryer  to the drilling  cuttings  skips.  The Screw conveyor under the shale shaker and mud cleaner is  about  25m length  will  be  placed  on  top  of  the walkway in front of the shakers and mud cleaner with enough extension to allow for an emergency skip to be placed before the second screw conveyor. This Screw conveyor will  be used both during WBM drilling phase and OBM drilling phase. Two discharge holes with a sliding plate will be made on the screw conveyor to allow for cuttings discharge into the coral during
WBM phase and to be closed during OBM phase. A third discharge hole will be towards the end of the auger extension to discharge into a drilling cuttings skip in case of emergency repair or maintenance on the Vertical Cuttings Dryer.

The next Scew conveyor (2) about 10 mtr length will be at an angle (90Deg) from the first screw conveyor, facing the coral direction. This screw conveyor will be inclined vertically to about 10-15 deg off its swivel base line, to be able to discharge drilling cuttings at the top/feed end of the drilling cuttings dryer.

The third (3) conveyor about 6 mtr length will be installed beneath the Drilling Cuttings Cryer chute and inclined outwards to fill the double skip arrangement.