ACOUSTIC DOWNHOLE EMITTER Russian patent published in 2013 - IPC E21B28/00 E21B43/25 E21B37/00 

FIELD: oil and gas industry.

SUBSTANCE: device includes an electromechanical vibrator, an electric generator connected to the vibrator inlet and having the possibility of changing the phasing of exciting signals of the vibrator. Vibrator consists of two identical symmetrical parts in the form of rectangular metal plates, on the opposite parts of which piezoelectric plates having the opposite polarisation relative to metal plates are rigidly fixed. Outer sides of piezoelectric plates are covered all around with a sealing layer of waterproof material and electrically connected to each other and to one of the generator outputs. Metal plates are connected to the other generator output. Vibrator fastener is made in the form of two identical symmetrical parts relative to the well axis, which form a rigid clamp enclosing the cylindrical surface of elements of the well mouth part.

EFFECT: increasing destruction efficiency of deposits.

3 cl, 2 dwg