PLANT FOR IMPULSE ACTION ON PRODUCTIVE FORMATION Russian patent published in 2013 - IPC E21B28/00 E21B43/25 

FIELD: oil and gas industry.

SUBSTANCE: plant involves a tubing string with a cylinder attached to it, a piston with end-to-end inner channel placed in the cylinder and a pressure valve installed at the lower end. In the cylinder walls there are radial windows than can be open at the upper point of the piston stroke. At the cylinder bottom there is a transmitter with possibility of reciprocative movement; it is connected to a waveguide mechanically. Radial windows are located at a smaller distance from the lower butt of the cylinder than the piston length.

EFFECT: improvement of overall performance due to loss reduction during impulse transmission to a productive formation with simultaneous pumping off.

1 dwg