METHOD FOR INTENSIFICATION OF OIL PRODUCTION, ELIMINATION AND PREVENTION OF DEPOSITS IN OIL AND GAS PRODUCING AND INJECTION WELLS AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2020 - IPC E21B28/00 E21B43/24 E21B43/25 E21B37/00 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to the field of oil and gas industry, mainly to extraction of viscous and super viscous oil, and also can be used for intensification of oil production, complicated with viscous components and deposits. Disclosed is a method of intensifying oil recovery, eliminating and preventing deposits in oil and gas producing and injection wells, in which electric energy is transmitted to well depth in the form of high-voltage pulses with high frequency of their following along cable and tubing string of the well, obtained by discharging capacitive accumulators through pulse transformer to cable cores, and are used for excitation of pulse current and accordingly pumping of energy of pulsed magnetic field in induction circuits formed by cable cores, pipe string and (or) inductor, by means of which induction heating and electrodynamic vibration action is performed to pipe string. At that, pulse current in induction circuits is excited by shorter compared to duration of pulse current with high-voltage pulses and at the same time by reducing the duration of high voltage pulses, power and distance of energy transfer are increased by increasing energy in the high voltage pulse itself and increasing their repetition rate. Possibility of high-voltage pulses compression into low-frequency power packets is used without loss of transmitted power to obtain a low-frequency shock-vibration-wave action. At that transmission of pulses to the well depth is carried out via parallel channels of at least two, for which a cable is used, having for transfer of pulse energy of not less than three conductors, and performing induction action on pipe string or residential cable in each power transmission channel or using an inductor receiving energy from said power transmission channel. Exposure, with the help of each power transmission channel, is carried out in a separate section by closing the cable cores in the power transmission channel to the pipe string and or to an inductor acting on the column metal in that section. Simultaneously, duration of pulse current in all channels of energy transfer is reduced by increasing the number of sections, aligning parameters of induction circuits formed by these sections, synchronization and alignment of high-voltage pulses in power transmission channels. Proposed device comprises capacitance energy accumulator, pulse transformer with primary and secondary windings, transmitting and induction cables and inductors. Secondary winding of pulse transformer is sectional. Transmitting induction cable has at least three conductors, in which cores in alternating order are connected to sections of secondary winding, note here that said strands from the other end of the cable are also closed in alternating order to well string or inductors arranged in series with cable connection sections to form induction circuits for induction action on metal of well string.

EFFECT: high efficiency of the method due increased volume and intensity of complex thermal, high-frequency acoustic and low-frequency shock-vibration effects.

12 cl, 8 dwg