WELL HYDRAULIC-ABRASIVE PERFORATOR Russian patent published in 2005 - IPC

FIELD: oil and gas industry.

SUBSTANCE: device has hollow body, comprising separate sections and made with jet heads, placed along body height spirally and directed under sharp angle to horizontal axis of body. Body also has tail piece, upper and lower ball valves, shear sleeve, stopping ring in lower portion of upper section. Dependently on opened massif of bed body is made with several sections analogical to upper one. Diameter of ball valve of each upper section, starting from downwards, is less than inner diameter of shear sleeve of previous upper sections and matches mounting saddle of shear sleeve, appropriate for the latter of upper sections of body. According to invention body is made with eccentrically positioned axes of inner and outer diameters. Upper section is made with one body with intermediate sleeve having diameter equal to diameters of shear sleeve and stopping ring jet heads of upper section are made with outer and inner technological plugs. Each section of well hydraulic-abrasive perforator is made with isolating compacting assembly, positioned after each lower head and having flow aperture, piston and compacting element.

EFFECT: broader functional capabilities, higher efficiency.

3 dwg, 1 ex