The objective of this paper is to evaluate the performance of a One-Step Solids Control Equipment (OSSCE) based on the actual field data. The material balance technique was used to achieve this objective. The data obtained consisted of density, volume flow rate, solids content, and size distribution of each flow stream of OSSCE. The cost-effectiveness of using OSSCE as compared to mud cleaners was investigated using the actual field data obtained on the same mud run through the two equipment. In addition, the cut point curve for each equipment was obtained.

The results indicated that the cost of using mud cleaner on the mud sample analyzed is about 4.5 times higher than that of using OSSCE. This is due to the fact that the mud cleaner discarded only 1.7 times more low gravity solids than weight material while OSSCE discarded 4 times more low gravity solids than weight material. About 31% of Chlorite that entered OSSCE was discarded by concentric discharge and screen overflow discharge. This high percent by volume of Chlorite discarded is attributed to the high amount of flocculation of Chlorite particles. The lowest percent by volume of clay type discarded belongs to Kaolinite (3%), which is due to the lesser amount of flocculation by this clay type. Finally, the results indicated that the cut point curve will shift to the left as the volume flow rate of screen overflow discharge increases, resulting in sharper separation or lower d50.

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