ACOUSTIC TRANSMITTER Russian patent published in 1995 - IPC

FIELD: petroleum production. SUBSTANCE: device has active units, which are located in metal housing with sound-transmitting windows and are spaced from each other. Housing is pressurized and filled with liquid that is electric insulator. It has compensator of outer pressure. Sound- transmitting windows are made on level of spaces between active units and are vulcanized or sealed by rubber. Active units have two parts designed as piezoelectric packets or as whole piezoelectric elements between which acoustic reflectors are mounted. Acoustic reflectors are heavy weight insertions. Each active unit is bound with stud. Each reflector is rigidly attached to transmitter housing. EFFECT: increased functional capabilities. 2 cl, 1 dwg