FIELD: mining.
SUBSTANCE: coupling adapter of a perforating system comprises a circular casing, a groove formed through a lateral side of the casing, an element of pressure pulling and a knock-free divert valve to ensure communication through a wall of the coupling adapter. The valve opens selectively and may comprise a damaged element. The damaged element is broken with a shock wave developed during ignition of a connected detonating cord.
EFFECT: elimination of trapped pressure generation in the coupling adapter.
15 cl, 6 dwg
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