FIELD: oil-and-gas industry.
SUBSTANCE: device comprises cylindrical case with inner cavity, thrust ring and valve. Said cylindrical case can be secured to tubing. Note here that case thrust ring has high-pressure channel for hydraulic communication of cylindrical cavity with hole annuity. Half the circumference of cylindrical case bottom end is composed by saw-like ripper while another half has skew cut. Case thrust ring on ripper side has at least two high-pressure channels, aligned with case axis. Hole is made in the case thrust ring on skew cut side, off centre of case axis. Valve arranged inside the case opposite said bore to allow the down-up flow is composed of valve box with ball fitted in thrust ring bore. Valve box is rigidly secured to thrust ring.
EFFECT: higher reliability and efficiency of flushing.
3 dwg
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