... the underflow discharge ports by a concentric auger, also called a scroll or conveyor, which rotates at a slightly slower rate than the ... , which is called the overflow, light slurry, effluent, or centrate.In drilling fluids solid control, centrifuges are the fourth ... to the downhole. whether the drillings are effectively treatment or not, it is a vital factor. Oilfield Drilling Mud Decanter Centrifuge