WELL STRAINER CLEANOUT DEVICE Russian patent published in 2014 - IPC E21B37/08 

FIELD: oil and gas industry.

SUBSTANCE: device includes a hydropulsator at the flush fluid feed pipeline, the flush fluid return pipeline connected to the gap between the casing pipe and the flow string, the computer. Hydropulsator is installed at the flush fluid feed pipeline inside tubing string; it can alternate ripple frequency for automatic tuning of resonance frequency. Sensors of frequency and oscillation amplitude are connected downstream of hudropulsator through the sensing line and a valve; the sensors are coupled to the computer by an electric coupling.

EFFECT: improving efficiency of cleaning, reducing time required for cleaning, ensuring automation and simple operation.

3 cl, 5 dwg