WELL JET PERFORATOR Russian patent published in 2003 - IPC

FIELD: devices for well perforating, particularly, jet perforators. SUBSTANCE: jet perforator has carrier in form of a row of sections with upper and lower hermetically installed covers and jet charges, adapters in form of two hemispherical links with axial channels and device for detonation transmission. Jet charges are mounted in frames. Adapters are installed in hollow cylindrical holder and fixed by detents. Joining members of sections on covers are identical to those of adapters. Device for detonation transmission is made of flexible lengths of detonating cords. Their ends are provided with passive and active booster explosives located in body covers and in links of adapters, and fixed and isolated by plugs. Cover plugs are airtight. Value of clearance between plug and passive booster explosive in upper cover is selected for possible discontinuance of detonation with distributed sealing of section and filling of gap in well with fluid. EFFECT: simplified design, increased operate reliability and extended functional potentialities of claimed jet perforator. 2 cl, 6 dwg