PERFORATOR Russian patent published in 2010 - IPC E21B43/112 

FIELD: oil-and-gas industry.

SUBSTANCE: perforator contains a case 1 with a cylinder 2 inside and with windows 3 in it, where a piston 4 with share rods 5 and a ram 6 located, which enters a hole 7, connected to the support cavity 9 and an tool 10 with a discharge hole 11, connected to a discharge cavity 12, closed with a plug 13. The tool 10 fixed in a case axially to the support 9 and its cavity 8. The tool cutting edge angle 10 is greater then tool material friction angle and a penetrating pipe. In the discharge hole 11 the plug 14 with the share rods 15 installed, oriented on working fluid pressure cut in the support void 8, which is greater 5-10% than necessary for the pipe cutting one.

EFFECT: invention allows avoiding the tool jamming and non-return and the working fluid extreme high pressure in the tool cylinder.

1 dwg