Perforated Liners

Perforated liner is a sand control screen widely used in the horizontal
completion wells of SAGD and other thermal heavy oil recovery. It is made of
stainless steel or galvanized steel pipes slotted with single, double line or
staggered patterns. This metal tubing has excellent properties in withstanding
installation loads and operation loads make it the premier choice for SAGD.

The perforating of liners are done with 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.

Perforated liner geometry consists of stamped length, stamped width, line
density and perforating 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.

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