WELL STRAINER FILTERING ELEMENT CLEANOUT DEVICE Russian patent published in 2015 - IPC E21B37/08 

FIELD: oil and gas industry.

SUBSTANCE: device comprises a resonator installed inside the case of well strainer, source of pulsations. Well strainer is installed at the lower end of flow column inside the casing. Source of pulsations is installed in cavity of the well strainer and coupled to a log cable with oscillation generator, which is coupled by electrical connections through a coupling device to PC. Flushing fluid feed pipeline is connected to the flow column. Flushing fluid return pipeline is connected to a gap between the casing and the flow column, and frequency sensors and pulsation amplitude sensors are installed at the above pipeline. Resonator may be made as a cylindrical case with resonant cavity inside it; the case is concentrated inside the well strainer case. At inner surface of the resonator case there are radial openings connected to the cavity of the well strainer.

EFFECT: raised efficiency of clean-up and reduced time for repair.

4 cl, 5 dwg