FLUSHING DEVICE Russian patent published in 2014 - IPC E21B37/00 

FIELD: mining.

SUBSTANCE: invention relates to mining industry and is designed for restoring the permeability and capacity of the perforation channels in the boring casing. The device comprises a housing with a channel for supplying fluid, a cylinder with the annular chamber and tangentially directed channels. The housing is provided with a connecting nipple with a bottom in the axial channel with a through hole, with grooves on the inner surface. The cylindrical bore is made perpendicular to the axis of the nipple in the housing, in which a cup with a head and a cap is placed. The bore is covered with the bottom in which the drain pipe is fixed provided with a ledge and radial holes made with the ability to provide a hydraulic connection of the longitudinal channels on the cap with the axial channel of the drain pipe in the initial position. The cup forms an annular chamber with a drain pipe in which the spring with the support on the ledge is mounted. The cylinder is rigidly connected with a connecting nipple provided with the adapter. The adapter is provided with longitudinal grooves and the bypass holes connecting the cylinder annular chamber with its axial channel in which the piston and fasteners are mounted.

EFFECT: increased cleaning efficiency.

2 dwg