Reliable Slotted Liner for Better SAGD Horizontal Completion Well

Slotted liner is a robust and effective device for sand control in the horizontal completion wells of SAGD and other thermal heavy oil recovery. Its excellent properties in withstanding installation loads and operation loads make it the premier choice for SAGD.

Slotted liners are manufactured by laser cutting process without contact operation. This process can effectively avoid undesirable factors which will cause the deformation of the base pipe. Laser cutting process uses windows interface for easy operation and accurate calculation.

Slotted liner geometry consists of slot length, slot width, slot density and slot distribution. All these parameters can be bespoken to achieve the required open area. For example, multiple staggered pattern or gang pattern significantly increases the open area compared with single cut pattern.

Staggered slotted liner sample in staggered pattern

Staggered slotted liner fabricated by advanced laser cutting process

Slotted liner patterns

Three slotted liner patterns -straight, staggered and gang - are supplied. Each has its own characteristics.

Slotted liner in straight line pattern

Straight pattern

Staggered pattern with offset

Staggered pattern

Slotted liner in gang pattern or multiple staggered pattern

Gang pattern

Slotted geometry

Slotted shapes are classified into two types: straight cut slot and keystone slot. Compared with straight slot, keystone slot has higher resistance against plugging for its inter size is larger than the surface size. Once the sand entering the keystone slot, the possibility of clogging will drop sharply.

Slotted liner with straight cut slot

Straight cut slot

Keystone slot’s width is increasing from surface to the inside

Keystone slot


For more information about slotted liner, please consult slotted liner basic knowledge.


Required slot per ft. for 3% open area
Slot Width (mm) Slot Width (inch) 3.5" Liner 4.5" Liner 5.5" Liner 7" Liner
0.38 0.015 176 228 276 352
0.45 0.018 148 188 232 296
0.5 0.020 132 172 208 264
0.63 0.025 108 136 168 212
0.7 0.028 96 124 148 188
1 0.038 52 68 84 104
1.5 0.058 36 44 56 68
3 0.125 16 24 28 32
6 0.250 8 12 16 16
Slotted liners are inspected by our professional workers

Slotted liner in gang pattern or staggered patter

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