DIRECTED ROD-SHAPED PIEZOCERAMIC RADIATOR FOR ACOUSTIC LOGGING DEVICE, DEVICE AND ACOUSTIC LOGGING METHOD Russian patent published in 2013 - IPC G01V1/40 E21B47/14 

FIELD: physics.

SUBSTANCE: disclosed is a rod-shaped piezoceramic acoustic pressure radiator with a one-sided beam pattern, having a housing made of steel in form of a pipe, an activating element consisting of a plurality of piezoceramic discs placed on a tension rod which is mounted in the housing, a radiating element with a truncated cylindrical shape, a damper placed at the end of the tension rod and rigidly attached to the housing and with one end of the activating element. The piezoceramic discs of the activating element are placed on an insulating layer which is deposited on the tension rod, and are merged in at least three sections. One end radiating end is inclined to the axis of the housing at an angle ranging from 90° to 15° to form a truncated cylinder. The piezoceramic acoustic pressure radiator has a reflecting element made of steel, which has the shape of a truncated cylinder, placed in the housing, one of end of which faces the activating element, and is inclined to the axis of the housing at an angle ranging from 15° to 75°. The invention also discloses a device and a method for full-waveform logging.

EFFECT: high accuracy of probing analysed objects.

11 cl, 18 dwg