GN desander for drilling fluids recycling is the second class solid control equipment to treat the drilling fluids from rigs. 
According to the size of the cone diameter, it can separate solids with different size. For oil and gas drilling, for HDD, CBM field, 10 inch cone is most probably used. For microtunneling , usually bigger size desander need to be used: 12 inch, or even 20 inch.
10" cones desander is used to separate solid-phase particle size 47-76μm in the drilling fluids