The slotted liner

is mainly used to the water and oil reservation layer withoutmuch sand .

its function is prevent the rock bits dropping into the well bore .

the working principle is allowing the certain size sand comingthrough the surface with crude oil but keeping the bigger size sandbeing stopped outside to form sand bridge .

and thereby achieving the anti-sand purpose . this type ofproduct is commonly used to sand rock and carbonate reservoir , andespecially useable for horizontal wells . 

Sorts??? API casing Length: <15M (each)

Outside diameter : 50-200mm.Slot width : 0.10-4.0mm±0.03mm 

Slot number : as per customer’s request/

Slot shapes : Straight in line pattern , staggered pattern ,spiral pattern .

Slot Space ???as per customer’s request . 

Slotted casings with apertures of 0.20-6mm are widely usedto sands prevention of oil and wells.