As a solids control equipment of the second stage in drilling operation, desander is used to remove harmful solid particles of 40-74µm in drilling liquid.  Suspending particles can be separated from the liquid under the centrifugal acceleration, by use of working principle of centrifugal subsidence.
At present time, two types, ZQJ300x2 and ZQJ300x1, are available. The former applies to over 3000-meter-long drills, and the latter i applies to small drills of less than 3000 meters and service rig.  

Main performances and parameters

Max disposal capacity	240/120m3/h
Working pressure	0.2—0.45MPa
Separation size	40--74µm
No. of meshes	150—200
Rotate speed of excitation	1400r/min
Motor power of sieve box	0.5kw
Weight	720kg