What is the difference between the working characteristics of desilter and desander

What is the difference between the working characteristics of desilter and desander?

The desander is a secondary solid control device in the solid control system, which is used to separate solid particles with a particle size greater than 47 microns in the drilling fluid. The function of the desander is to reduce the load of the downstream desander. Installing a desilter in front of the desilter can remove a large number of grains in the load of the desilter and improve the working efficiency of the desilter. When drilling at high speed, especially in shallow wells with loose soil, large diameter drill bits are often used, so a large number of cuttings are generated, which can lead to "rope" discharge at the desilter end, so it is necessary to A desander is installed upstream of it, which can provide a larger volume capacity to separate the coarser cuttings. The desander can only handle the overflow on the desander only if the desander clears the large grain cuttings in the high concentration fluid. If the drilling speed is slow and only about half a ton of cuttings can be produced per hour, the desilter can usually handle the entire circulating drilling fluid, and the desilter can be turned off.



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