Drilling fluid centrifuge is the fourth stage separation equipment in solid control system. Centrifuges can be used many industries, such as oil&gas drilling, waste water treatment, food and chemical industries.

And the decanter centrifuge is widely used in oil& gas drilling. Decanter centrifuge is used in drilling mud system for separating suspension of solids phase with particle diameter(d≥2μm) for drilling mud circulation and drilling fluids recycling. Ruggedly built for oilfield and industrial services, drilling mud centrifuge is especially effective in environmentally sensitive areas.

centrifuges

Drilling mud decanter centrifuges are equipped with either fixed or variable speed arrangement on the main drive enabling the operator to adjust the bowl speed between 1200 and 3850 rpm within a few seconds.  This option, combined with variable conveyor speed, gives a unique dimension to the use of decanters for drilling fluids treatment. The optimum speed for solids removal for a specific cut point depends on the composition of the drilling fluid and the nature of the drill cuttings.

decanter centrifuge

The liquid drilling mud is fed into this long cylindrical bowl, where the centrifugal force presses it outwards to form a layer – known as the pond – around the wall. The thickness of this layer is determined by a series of discharge weirs at the end of the cylindrical section. The clarified liquid flows out over these weirs, with the aid of centrifugal force. Since the solids in the mud are heavier, they remain plastered against the bowl wall, and are continuously removed by the screw conveyor. They are then transported up to the conical section (known as the beach) where they exit via the discharge ports at the narrow end. Cleaned drilling mud exits at the opposite end.

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