anti-sand or for the application for prevents the rock bits dropping off the well bore.
The slotted liner is mainly used for the application of oil reservation layer without much sand or for the application for prevents the rock bits dropping off the well bore. The working principle is that it allows certain size sand coming up onto the surface with crude oil, but keep bigger size sand on the outside of the sand bridge, those bigger size sand formed up a sand bridge to complete the anti-sand purpose . This type of product can be used for sand rock and carbonate oil reservation .
