CUTTER OF HYDRA-MECHANICAL SLOTTED PUNCH Russian patent published in 2009 - IPC E21B43/112 

FIELD: oil-and-gas production.

SUBSTANCE: cutter of hydra-mechanical slotted punch includes machine tooling in the form of discs 3, located in casing of punch with ability of upright-radial moving-out through grooving of punch casing, and moving-out gear 4 of discs 3, actuated by piston 5, removed in casing of punch under pressure. Cutter contains at least two cutting sections 1 and 2 with cutting discs 3 moving-out gears 4, casing of cutting sections are implemented as dismountable and connects to each other by threaded fastener 7 with ability of axial turn relative to each other for required angle. Herewith connection of cutting sections 1 and 2 is implemented with ability of fixation 8 under selected rotation angle, and moving-out gears 4 of discs of all cutting sections are set in motion by pistons 5 and 6, successively connected to each other by means of tension bars 9 and connecting screw 10.

EFFECT: productivity improvement of punching unit and reduction of time, spend for implementation of perforation, improvement of column opening ensured by simultaneous formation of perforating slots on four and more projections.

2 dwg