FACILITY FOR OPERATION AND CLEAN-UP OF WELL Russian patent published in 2010 - IPC E21B37/00 

FIELD: gas-and-oil industry.

SUBSTANCE: facility consists of hollow rod, of back valve, of case coupled with tail piece equipped with filter and packer from below; packer includes expanding cone inserted into it and connected to hollow rod. The cone has a cylinder lower part telescopically inserted into the case and performing restricted travels downward; it is fixed with a shear element relative to the case. The back valve is installed in the tail piece below the filter; it corresponds to a disk valve. A valve seat is pressure tight interacts with the end nipple lowered on the flow string inside the facility. Below the filter the tail piece is equipped with process channels. The case is fixed with breakable elements relative to the tail piece.

EFFECT: simplification of design and expanded process functionality.

1 dwg