DEVICE FOR OPERATION INTENSIFICATION OF HORIZONTAL WELL Russian patent published in 2015 - IPC E21B43/16 E21B34/06 E21B43/08 

FIELD: oil and gas industry.

SUBSTANCE: device includes tubing string with a pump, a valve, a liner. In the tubing string below the pump in the vertical section of the horizontal well the valve is installed. The liner with filter is connected to the valve from bottom. The valve is made in form of the coupling with cone seat, and installed in the coupling of the two-stage plug out of plastic material with through holes made in its side surface. The top stage of the plug tightly interacts with the coupling. Between the bottom stage of the two-stage plug and coupling a ring clearance is made. The bottom end of the plug is made in form of the cone, and has possibility of tight interaction with the cone seat of the coupling. The two-stage plug has the possibility of limited axial movement relatively to the coupling. The height of the two-stage plug is below the distance from the hole in the coupling to end of the bottom pipe of the tubing string. At the ends of the pipe with holes diameter 6-7 mm the supports are rigidly secured. Between the supports on the pipe against the holes a filtering element is concentrically installed. It is made out of wire wound by turns along spiral with turns spacing 1.0 mm, it is connected with wire longitudinal stringers creating the drain channels between the pipe and filtering element.

EFFECT: increased operation reliability of the device in the horizontal well, and increased efficiency of cleaning of the produced product, increased time between repairs of the device, reduced metal consumption.

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