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Jan 21

In this article, we will mainly talk about the desander’s working principle.

Desander, one of the most widely used solids control equipments used on treating the drilling fluid.

GN Desander

GN Desander

As we know, with the drilling fluid circulates the drilling cuttings chipped away by the drilling bit continuously when the drilling rig is working, the different sizes of drilling cutting goes into the drilling fluid and the physical properties of drilling fluids will be changed, such as the density, viscosity, solid content, etc. The drilling fluid could not meet the further work demand.

In order to save the cost and protect the environment, in most of the time the drilling fluid needs to be recycled. Now the Desander and some other necessary solids control equipments like Shale Shaker, Desilter, Decancter Centrifuge will be worked together for treating and cleaning the drilling fluid. By through treating the drilling fluid, the different sizes of drilling cuttings will be separated out and the physical properties of drilling fluid will be recovered.


According to the technical design, the Desanders made by GN Solids Control company are usually used for separating out the solids particles over 40μm in the fluid loop. 

Normally the desander is used for doing the 2nd-stage treatment with the drilling fluid that after the 1st-stage treatment by Shale Shaker. The main part of 1 desander is the Hydrocyclone. Its work principle is as below,

Desander Working Principle

Desander Working Principle

  1. Normally pumping the treated drilling fluid by Shale Shaker to the Desander and the fluid goes into the Hydrocyclones of desander;
  1. Operated by the centrifugal force and as the centrifugal forces are different for the solid particles and liquid.
  1. Finally, the solid particles will be drained out together with some liquid from the underflow port together; the clean drilling fluid will be drained out from the overflow port.

If you want to know about GN’s Desilter, Welcome to visit GN’s website and contact us.


written by GN Desander Desilter \\ tags: ,

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