DOWNHOLE DEVICE FOR PREVENTION OF FALLOUT OF DEPOSITS FROM FLOW OF MINED OIL-BEARING PRODUCTS, METHOD OF ITS MANUFACTURING AND OPERATION Russian patent published in 2009 - IPC E21B37/00 

FIELD: oil-and-gas production.

SUBSTANCE: device contains casing, implemented with ability of embedding into strip of oil-well tubing, installed in casing package of oscillations creation implemented with ability of action upon flow of mined products under action of mentioned flow. Package of oscillations creation is implemented in the form of packages of involution and scoring of flow. Package of involution corresponds cavity, limited by tapered surface of casing with tangential inlet and with located lengthwise its longitudinal axis rod-shaped turbolator, rigidly fixed by one end. Scoring package includes communicated hydraulically to cavity of involution package cylindrical chamber, open on outlet, with located lengthwise its longitudinal axis by free end of rod-shaped turbolator, outfitted by additional regulated turbolator. After assemblage of the device it is implemented setting of its package of oscillations creation to resonant behavior by changing of the position of additional regulated turbolator lengthwise free end of rod-shaped turbolator and flushing of fluid flow at bed with frequency characterisation.

EFFECT: design simplification and effectiveness increase of cleaning.

14 cl, 6 dwg