The Selection and Installation of Decanter Centrifuge for Drilling Fluids Circulation System

Oct 15, 2013

Drilling mud decanter centrifuge adopts centrifugal force to separate solid particles out of drilling fluids. Different solid or particle have different density and flow speed, drilling mud decanter centrifuge also can separate particles as different size and density. Drilling mud decanter centrifuge is widely used in such industries as oil and gas drilling, chemical, foodstuff, pharmacy, mineral beneficiation, water treatment, etc.

Decanter centrifuge provides high-speed, variable-speed, big bowl and big volume centrifuges designed specifically to process drilling fluids and drilling waste to meet the highest environmental standards. High fluid recovery rates and efficient solids control are crucial to any drilling operations. By using KOSUN Decanter Centrifuge, it will help drilling contractors dramatically reduce total drilling fluids cost and leave much less drilling waste for disposal.

The feed enters the bowl through a stationary inlet tube and is accelerated smoothly by an inlet rotor. The resulting drilling mud decanter centrifuge forces make the solids gather on the wall of the bowl. The conveyor and the bowl rotate in the same direction, but at different speeds, which has the effect of moving the solids towards the conical end of the bowl for removal.
 

Decanter Centrifuge
 

The Selection of Decanter Centrifuge

For petroleum drilling mud treatment, we have both weighted and unweighted fluid. Then, centrifuge selection and configuration will not be the same. The well drilling depth is relative with fluid treatment.

Petroleum mud centrifuge has 3 types in total. We can classify it as large capacity centrifuge, high speed centrifuge, and barite re-circulation centrifuge. They have their own features and edges. We can adopt them on certain occasion.

Due to different drilling conditions and well depths, sometimes we need configure or combine different types of centrifuges together to get ideal performance and save petroleum drilling cost and get more benefit.

Drilling Mud Decanter Centrifuge Installation

The installation site of centrifuge should be convenient for discharging base flow and recycling overflow. About the current level drilling fluids solid control system, the storage tank of desilter and mud cleaner treating fluid can also act as the suction tank of centrifuge, and the storage tank which recycling overflow must have agitator.

When using the centrifuge to recycle the barite of weighted drilling fluids, the separated base flow should be re-injected to the drilling fluids recycling system, because the base flow contains little liquid and is difficult to flow, it is hard to mix with drilling fluids, so the effect of agitator is very important, in other words, the mud tank which recycling barite base flow must contain has stirring apparatus. If the separated base flow is discarded through chute, the angle of inclination of chute will be 42°at least, and convenient for the waste flowing.