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Glossary:Liner
In the context of casing, a liner is a partial string of pipe that does not run back to surface. Liners may or may not be cemented.
In the context of a perforating charge, a liner is the inner liner over the propellant in a perforating charge, most often made of pressed, powdered copper mixture or drawn or stamped from copper sheet. The liner deforms as the charge is fired and its mass is added to that of the jet from the charge.
In the context of sand control, a liner is a perforated, drilled or slotted liner for formation control or to preserve wellbore access.