CLEANING DEVICE OF FILTER ELEMENT OF WELL STRAINER Russian patent published in 2015 - IPC E21B37/08 

FIELD: oil and gas industry.

SUBSTANCE: device includes at least one resonator installed inside a well strainer housing and a pulse source. The well strainer is installed on the lower end of a tubing string. The pulse source is made in the form of a valve-pulsator with a controlled drive and installed in a supply pipeline of washing liquid to the well strainer; the controlled drive is electrically connected to a computer, and pulsation frequency and amplitude sensors are installed after the valve-pulsator. The resonator can be made in the form of a cylindrical housing with a resonant cavity inside it; the cylindrical housing is centred inside the well strainer housing, and on the inner surface of the cylindrical housing of the resonator there are radial holes interconnected with the cavity inside the well strainer.

EFFECT: improving cleaning efficiency; reducing time consumption.

4 cl, 4 dwg