METHOD FOR PERFORMING ELECTRO-HYDRO-IMPULSE PROCESSING IN OIL-GAS WELLS AND DEVICE FOR REALIZATION OF SAID METHOD Russian patent published in 2007 - IPC E21B43/25 

FIELD: oil-gas industry, possible use for increasing oil-gas yield of productive beds of oil and gas wells by affecting them with blast wave energy.

SUBSTANCE: in accordance to method, electro-hydro-impulse effect is introduced onto face-adjacent area of oil-gas well by excitation of electric charge between electrodes in working zone with provision of generation of directional blast wave and its focusing on the surface of column with perforations. In accordance to invention, blast wave is made divergent in form of cylindrical front in radial direction. Electric charge is created by means of electrodes, surfaces of which facing each other in each cross-section along the axis of column together form the shape of parts of two intersecting ellipses in such a way, that axis of column passes through combined focus of ellipses. Their second imaginary focuses lie on the surface of column with perforations. Device contains electrodes, providing for creation of electric discharge with emission of directional impact wave. In accordance to invention, device contains liquid-filled axial-symmetric discharge chamber, formed by surfaces of two electrodes facing each other and cylindrical membrane, held along edges of electrodes and forming side surface of discharge chamber meant for contact with surface of column with perforation. Cross-section of aforementioned surface of each electrode along symmetry axis of chamber forms shape of parts of two intersecting ellipses, combined focus of which lies on symmetry axis of chamber. Imaginary focuses of aforementioned ellipses reservoir located behind the membrane outside the chamber with possible coincidence with the column surface.

EFFECT: increased power and efficiency of effect on oil-gas formation.

2 cl, 1 dwg