The slotted liner is mainly used to the water and oil reservation layerwithout much sand. It's function is prevent rock bits dropping into thewell bore. The working principle is allowing the certain size and comingthrough the surface with crude oil but keeping the bigger size sandbeing stopped outside to form sand bridge, and thereby achievement theanti-sand purpose. This type of product is commonly used to sand rockand carbonate reservoir, and especially useful for horizontal wells.

PI Std. Casing API			ID (mm)	Length (m)	Slot Length (mm)	Slot No. (NO./m)	Slot Width (mm)	Slot Tolerance	Valid Filter Area (cm/m)	Max. Strength KN
Spec (mm)	Thickness (mm)	Per Weight (kg/m)
60.32	5	6.84	50.3	3-12	10-200	200	0.25-15	±50	48	512.54
73.02	5.5	9.15	62			240			57.6	688.55
88.9	6.5	13.22	75.9			280			67.2	995.1
101.6	6.5	15.22	88.6			300			72	1151.2
114.3	7	18.47	100.3			320			76.8	1400.4
127	7.52	22.13	112			340			81.6	1673.8
139.7	7.72	25.11	124.3			360			86.4	1900.2
	9.17	29.48	121.4			360			86.4	2232.4
168.3	8.94	35.09	150.4			400			96	2672.95
177.8	8.05	33.68	161.7			440			105.6	2559.2
	9.19	38.19	159.4			440			105.6	2940.7