DEVICE FOR WELL CLEANUP Russian patent published in 2009 - IPC E21B37/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to fluid extraction from oil and gas wells field, particularly to well cleanup against sludge. Facility includes well bottom cleaning mechanism, consisting body with bearing sleeve, shoulder piston installed inside the body, step of which is borne on deformed washer, tightened by stay nut to bearing sleeve, diffuser with located lower it pivot-hinged damper. Device is implemented with ability of dropping into well on pump-compressor pipes and outfitted by impact mechanism on bottom-hole zone, implemented in the form of body, in cavity of which it is located breakable element, and bottom end is blocked by plug. Impact on bottom-hole zone mechanism body is connected to body of treatment mechanism for well bottom by means of intermediate body and bush. Intermediate body allows radial openings, implemented with boring, in which it is located diffuser with hinge. Intermediate body allows the ability of movement jointly with impact mechanism on bottom-hole zone body relative to the body of treatment mechanism of well bottom. Breakable element is located lower the radial openings of intermediate body.

EFFECT: it is accelerated cleaning process, it is increased reservoir performance.

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