FORCE BLOCK OF SLIT PERFORATOR Russian patent published in 2004 - IPC

FIELD: oil and gas extractive industry.

SUBSTANCE: device has working cylinder, additional cylinder with upper and lower engaging threads connected to upper thread by pass valve, and to lower by working cylinder, spring-loaded piston connected to hollow rod, choke aperture of additional cylinder, separator of working and additional cylinders, working cylinder spring tensioning device, small locking ball. Upper portion of piston of additional cylinder has a depression in form of cone. Larger diameter of cone is at upper portion. Lesser diameter of cone mates upper engaging thread of piston into which a removable light is screwed during operation of perforator in slanting and horizontal well. Along perimeter of cone technological grooves for wrench are made. By lower thread the piston is connected to hollow rod in which locking ball is placed. Landing cone has shear piston of pass valve. In lower portion of pass valve a stopping ring is placed. Separator of working and additional cylinders is made with floating packer compaction. Above separator a choke aperture of additional cylinder is placed, and under separator a working cylinder spring tensioning device is placed.

EFFECT: broad technological capabilities of slit perforator and higher reliability of its force block operation.

1 dwg