FACILITY FOR OPERATION OF WELL Russian patent published in 2009 - IPC E21B43/16 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry and can be implemented at operation of well, at performing intensification operations, at operations preventing settling of pyrobitumen-resinous sediments in bottomhole zone of reservoir bed, and at reduction of fluid watering in highly water flooded wells. The essence of the invention is like follows: the facility contains a flow column, a sucker-rod pup, and a tail-piece with a filter. A doubled piston is installed on the tail piece 5-10 m above perforation interval; the piston has a spring between parts of the piston; parts of the piston are designed to relative movement against each other; the piston has exterior diameter 1-5 m less, than interior diameter of the flow column. The bottom of the tail piece is located 5-10 m below the interval of perforation.

EFFECT: increased yield of well, reduced intensity of production watering, increased efficiency of cleaning of well and bottomhole zone.

1 ex, 1 dwg