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Aug 22

Both GN Desander and Desilter are composed of a group hydrocyclones (also called cyclone separator) and a shale shaker. By using GN Desander and Desilter, we can separate sand & silt from the drilling fluids.

As the key part of GN Desander and Desilter, hydrocyclone plays a vital important role in solids control.

GN Hydrocyclone

As we all known, the larger of the nominal dimension of cone, the larger solid particles can be separated, and the smaller working pressure be needed, so the larger manage capacity of the drilling fluids. Different diameters of hydrocyclones can separate different particles.

Hydrocyclone consists of two exits on the axis: the smaller on the bottom (underflow or reject) and larger at the top (overflow or accept). Generally, the underflow is the denser or thicker fraction, while the overflow is the lighter or more fluid fraction.


GN Hydrocyclone Operation_

1.GN Hydrocyclone in Desander

The size of GN Hydrocyclone in desander is 10’’. It incorporates a precise combination of proportions, angles, ratios and materials to optimize separation of solids from the feed material. For finer particle separation, the desander discharge may be fed to a desilter, sometimes it will directly feed to the screening equipment. Centrifugal pump is used to pump the drilling fluids from mud tank into the set of hydrocyclones.

The Desander is installed after shale shaker and degasser but before desilter. Desander removes those abrassive solids from the drilling mud which cannot be removed by shale shakers.

2. GN Hydrocyclone in Desilter

The size of GN Hydrocyclone in desilter is 4”. It can remove solids in the 16 micron to 80 micron based on different feed slurry.

Optimal performance of hydrocyclones requires a proper balance of feed head, feed rate and apex opening. Improper balance of any these variables can adversely affect performance.

Besides, hydrocylone is one of the spare parts in Solids Control equipment, after certain some usage, it’s better to replace it with a new one.

 

written by GN Desander Desilter \\ tags: , ,


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