ACOUSTIC SYSTEM FOR PRODUCTIVE WELL ZONE TREATMENT Russian patent published in 2008 - IPC E21B43/25 

FIELD: oil and gas industry, particularly to stimulate oil and gas production along with increased hydrocarbon product recoverability.

SUBSTANCE: acoustic system comprises master oscillator and serially connected pulse-phase converter, switching power amplifier, linkage and logging cable. Device also has acoustic radiator and power supply device with input linked to power mains bus and output connected to power supply bus of switching power amplifier. Device additionally includes parametric feedback circuit, support voltage driver circuit and compensation unit linked between logging cable outlet and acoustic radiator leads. Parametric feedback circuit input is connected with power supply device output, input thereof is linked to input of support voltage driver circuit input. The second support voltage driver circuit input and output are connected between master oscillator output and pulse-phase converter input. To increase acoustic treatment efficiency three-conductor cable is used. Two conductors of the cable are connected in parallel at input and output of logging cable to increase driving power of downhole acoustic radiator.

EFFECT: increased efficiency of acoustic productive well zone treatment due to increased energy efficiency within extended acoustic oscillation range with power supply from industrial power mains.

2 cl, 2 dwg