FIELD: drilling of soil or rocks; mining.
SUBSTANCE: invention relates to oil wells and in particular to blasting devices for perforating casing pipes and cement rings to create channels in the rock where oil and gas can flow into the wellbore. Cumulative-projectile gun perforator comprises a casing, an electric cable, a detonating cord, an explosive cartridge, a cumulative charge in the casing and a coaxially located wellbore with a torpedo projectile fired immediately after the cumulative charge is actuated. Torpedo projectile is a torpedo with an explosive exploding in a cumulative channel formed in the rock.
EFFECT: increased depth of the channel and creation of branched cracks in the rock, increased inflow of formation fluid into the well are provided.
5 cl, 1 dwg
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