Usually, an oil well has its maximum level of drilling solids that can be tolerated before problems immerse. This level depends on the solids formation, the type of drilling mud used, and the characteristics of the solids. But many work-over rigs that occasionally do some drillings still do not employ solid removal equipment which seems to work satisfactorily only as long as drilling is confined to short intervals. Drilling without removing solids, the circulating system will contain a constant volume of slid phase. The pit level will also remain at a constant level even through the circulating volume increases as an additional hole is drilled, (pit levels will actually rise by the volume of the drill string to added to the hole). The additional solids from drilling mud will increase the mud weight. Usually many problems will arise if too many drilling solids are allowed to remain in the drilling mud. These effects do not immediately appear after the drilling solids concentrations reach excessive levels. For this reason, many drillers accustomed to drilling shallow wells with unweighted drilling mud, find it hard to believe that drilling solid are the cause of their problems. Experience has shown them otherwise. Therefore, it is beneficial to take the detrimental effects of drilling solids seriously and remove them from the drilling mud.

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The process of drilling mud removal

The primary and the first stage equipment is a shale shaker which can do a solids removal above 75 microns and usually combine with other solid control equipment. The second and third stage equipment are desander that removes cuttings of 45-75 microns and desilter which do a separation between 15~45 microns. The desander and desliter can be work together to be served as a mud cleaner. Then, the last stage is decanter centrifuge which can remove the particles above 2 microns. After these steps, the drilling solids will be removed and the recycle and reuse of drilling mud can be achieved.

Established in 1992 KOSUN is the first group of manufacturers of drilling fluids solids control equipment,and an expert in drilling waste treatment.It is the forerunner of solids control equipment in China, which is specialized indecanter centrifuge,shale shaker,desander,desilter,mud cleaner and complete solids control system.. As the professional advanced decanter centrifuge supplier,KOSUN has won high recognition and praise from domestic and abroad with science core technique and a lot of innovative patents.At present, KOSUN's business scope mainly covers China mainland, Commonwealth of Independent States, North Africa,Australia, U.S.A.and etc.

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