DEVICE FOR TREATING DEPOSIT BY WAVES Russian patent published in 1999 - IPC

FIELD: oil production industry. SUBSTANCE: device can be used for increasing oil well output by subjecting productive bed to treatment by waves. Device has piston and at least one centralizer which are adapted for reciprocating motion along longitudinal axis of production string of well. Piston is made up of at least two round components installed on side surface of rod at longitudinal clearance l between them and at radial clearance σ in lateral plane between edge of round component and internal surface of production string in well. Thickness of round component δ, value l of longitudinal clearance, value of radial clearance σ are selected so as to meet requirements of 0,1 < l/D < 100; 0,005 < δ/D < 1; σ/D < 0,3, where D - internal diameter of production string. Application of aforesaid embodiment of device allows for increasing energy of wave treatment directly on productive bed together with reduction of dynamic action upon production string of well away from productive bed. In addition, device arrangement is simplified. EFFECT: higher efficiency. 8 cl, 5 dwg