DEVICE FOR PERFORATION AND TEARING OF BED OF OIL-GAS WELL (VARIANTS) Russian patent published in 2006 - IPC E21B43/117 E21B43/263 

FIELD: devices for concentration of energy and shaped-charge perforation.

SUBSTANCE: in accordance to first variant, device contains one-section or multi-section well perforator, lid, bottom, and ignition device, positioned inside or outside of aforementioned lid. In the body, charge clip is mounted, in which a set of single perforators is positioned, each of which is connected to detonating cord and contains charge socket, charge shell, perforating charge and explosive substance. Positioning cord is held on positioning clamp. In accordance to second variant, device contains one-section or multi-section well perforator, lid, bottom, and ignition device, positioned inside or outside of aforementioned lid. In the body, charge clip is mounted, in which a set of single perforators is positioned, each one of which is connected to detonating cord. Between upper and lower ends of charge clip and body of well perforator, positioning mechanism is mounted. In the bottom of well perforator, a groove for dropping pressure is made. In accordance to third variant, device contains one-section or multi-section well perforator, lid, bottom, and ignition device, positioned inside or outside of aforementioned lid. In the body of well perforator, charge clip is mounted, in which blasting cartridges provided with charges are positioned. Between adjacent blasting cartridges solid explosive substance is positioned. Detonation cord is connected to each charge. Between upper and lower ends of charge clip and perforator body, positioning mechanism is mounted.

EFFECT: increased efficiency of perforation and tearing of productive bed of well.

3 cl, 17 dwg