FIELD: oil and gas production.
SUBSTANCE: invention refers to oil and gas industry, particularly to hydro-mechanical perforation of wells. The sector method of fissure hydro-mechanic perforation of wells consists in forming a perforating channel in a cased column by a mechanical method - with reciprocal motion of a device for fissured perforation by means of lifting and lowering a flow string; while in a cement layer, in a complex- intensive bottomhole zone and in a producing layer the perforation channel is formed by a hydraulic jet flowing from the nozzle of a nozzle head directed upward at the angle of 45 degrees to the wall of the well. Also the nozzle of the nozzle holder is gradually moved downward in the process of channel forming at the angle of 45 degrees to the wall of the well; upon drop of working pressure the nozzle is returned into an initial position by the fissuring device equipped with a hydro-cylinder; a piston of the hydro-cylinder is connected to a fissuring mechanism by means of a hollow rod connected with the nozzle holder of the hydro-monitor nozzle via a high pressure flexible hose. Correspondingly the body of the nozzle holder is movably connected with the case of the fissure perforation and is designed to rock in vertical plane; the said body is also connected with the rod via a rocker with two axes of rotation rocking in the same plane.
EFFECT: increased efficiency of fissure hydro-mechanic perforation, and increased height and depth of producing bed.
5 cl, 5 dwg
