Customised Service Support-Desander And Desilter

Desander and desilter are devices for eliminated solids in solids removal system.  Hydrocyclone (cone or cyclone for short) is core part in both. Desander, desilter and shale shaker are composed by one unit, named mud cleaner, depend on client’s demand.

The material of hydrocyclone is polyurethane today, because it’s more wear resistance and less weight than steel. you can read this article to know more hydrocyclone, like its principle or something.

The role of desanders is to reduce loading downstream on desilters. Installing a desander ahead of the desilter relieves a significant amount of solids loading on the desilter and improves desilter efficiency. High rates of penetration, especially in the unconsolidated surface hole, where the largest-diameter bits are used, results in generating larger concentrations of drilled solids. This may place desilters in rope discharge. For this reason, desanders, which have the greater volumetric capacity and can make separations of coarser drilled solids, are placed upstream of desilters. Desanders remove a higher mass (i.e., coarser drilled solids) during periods of high solids loading. Desilters can then efficiently process the reduced solids-content overflow of the desanders.

If the drill rate is slow, generating only a few hundred pounds per hour of drilled solids, the desander may be turned off and the desilter used to process the entire circulating system.

Desilters should be used on all unweighted, water-base mud. These units are not used on weighted muds because they discard an appreciable amount of barite. Most barite particles fall within the silt-size range. Desilter operation is important for all unweighted fluids; however, in oil-base muds with high viscosity (as found in deepwater drilling), the apex discharge may be centrifuged for oil-phase salvage.