The difference between desilter and desander

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

Mud desander (drilling fluid desander) is a secondary solids control device in the drilling fluid solid phase control system, and it is one of the important equipment for stabilizing and adjusting drilling fluid technical indicators.

Desilter is one of the solid control equipment used in the next stage of desilter, also known as cyclone desilter, drilling fluid desilter, and mud desilter.

The desilter is used to treat all non-drilling fluids, and it is necessary to apply the desilter for treatment. However, in viscous oil-based drilling fluids (deep water drilling), the bottom discharge will have a large amount of adhesion to the oil phase.

Therefore, the weighted water-based drilling fluid cannot be used, and it cannot be used to treat the weighted drilling fluid, because it will remove a large amount of it. Of barite. Separate all non-aggravated desilter. 

When the drilling fluid containing a large amount of barite is processed and separated, neither the de-sander nor the desilter (including the micro cyclone) can be used, and only other solids control equipment can be used for processing. Because sand and barite have approximately the same size level.

Most of the barite particles are 2~44μm, a small amount are 44~74μm, and only 8%~15% are between 0~2μm. The separation particle size of the desilter is 25~30μm, while the separation particle size of the desilter is 10~15μm. Because many barite particles are above the above separation particle size, they will be discharged together with fine particles and coarse particles.

Desander is a secondary solids control device in the solids control system, used to separate solid particles larger than 47 microns in the drilling fluid. The function of the desilter is to reduce the load of the downstream desilter. Installing a desilter in front of the desilter can effectively remove a large amount of particles in the load of the desilter and improve the working efficiency of the desilter.

During high-speed drilling, especially in shallow wells with loose soil, large-diameter drill bits are usually used, so a large amount of drill cuttings will be generated, which may cause "rope-like" discharge at the port of the desilter.

A de-sander is installed upstream of the, at this time, it can provide a larger volume capacity to separate the coarser drill cuttings. Only when the de-sander removes the large particles of drill cuttings in the high-concentration fluid, the de-sander can more effectively deal with the overflow on the de-sander. If the drilling speed is slow, and only about half a ton of drill cuttings can be produced per hour, the desilter can usually handle all the circulating drilling fluid. At this time, the desilter can be turned off.

Xi’an HL Petroleum Equipment Co., Ltd. specializes in the production of cyclone desander, desilter, mud cleaner and mud purification device, we can customize according to customer requirements, welcome to send inquiry to us: sales@hlsolidscontrol.com if you have desander and desilter purchase request.