JET-CHARGE PERFORATOR Russian patent published in 2000 - IPC

FIELD: petroleum industry, applicable in secondary stripping of producing beds in production wells. SUBSTANCE: it is filled with explosive. An intermediate detonator is installed on the body end wall. On the opposite side provision is made for a jet-charge hollow with a liming. A screen in the form of a plate is positioned between them. It is positioned in the immediate proximity of the detonator and forms a duct for passage of detonation wave with the body end and lateral walls, the duct cross-sectional dimension equals the throat diameter. The angle at the crest of the jet-charge hollow is so selected that the detonation wave comes up perpendicularly to the middle of the depression lateral surface. EFFECT: enhanced piercing capacity and reduced dimensions of the rammer. 1 dwg