Apparatus and method for opening perforations in a well casing

Wells – Processes – With explosion or breaking container to implode

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Details

166376, 166296, 166 63, 166 55, 166297, E21B 2902

Patent

active

060952474

ABSTRACT:
An apparatus for opening perforations in a casing string. The casing string has a special casing section defining a plurality of holes therethrough. Rupturable ceramic discs or inserts are disposed in said holes and retained therein. The ceramic discs or inserts are adapted to withstand the fluid differential pressures normally present in the wellbore but are rupturable in response to impact by a mild explosive charge. The explosive charge is provided by detonating a length of det-cord disposed in the casing string adjacent to the holes in the special casing section. A method of perforating using this apparatus is also disclosed.

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