Device for decolmatation of the critical area of exploitation and injection wells

Abstract

The device for the decolmatation of the critical area of exploitation and injection wells includes a generator of electromagnetic pulses of resonant frequency, which is equipped with a controller (not depicted), and a coaxial cable which connects the generator to a downhole instrument, in which at least two converters for converting electromagnetic energy into mechanical energy are arranged, the converters operating at different frequencies. Furthermore, the converters for converting electromagnetic energy into mechanical energy are arranged in the downhole instrument in series in order of decreasing resonant frequency, and the dimensions of each of the converters are determined by the magnitude of the resonant frequency, each of which differs from the previous one by an integer of octaves. Furthermore, the cable which connects the generator of electromagnetic pulses to the downhole instrument is coaxial with a wave impedance which is equal to the output impedance of the generator and the input impedance of the downhole instrument.

1 . A device for decolmatation of the bottom-hole area of production and injection wells, comprising a generator of electromagnetic pulses of resonant frequency and a coaxial cable connecting the generator to a down-hole instrument, wherein, in order to increase the depth of the efficacious treatment of the bottom-hole area, the down-hole instrument contains no less than two converters of electromagnetic energy into mechanical energy; moreover, the signal sent from the down-hole instrument's generators to the converter of electromagnetic energy into mechanical energy is harmonic with stepwise enveloping, and each of the converters is tuned to the specific harmony of the overall signal. 
     
     
         2 . The device of  claim 1 , wherein the converters of electromagnetic energy into magnetic energy are positioned in the down-hole instrument sequentially in the order of decreasing resonant frequency, while the size of each converter is defined by the resonant frequency magnitude, and each subsequent frequency differs from the previous one by a whole integer of octaves. 
     
     
         3 . The device of  claim 1 , wherein the generator of electromagnetic pulses is equipped with a controller that enables one to form a signal with the required shape. 
     
     
         4 . The device of  claim 1 , wherein the cable is coaxial with wave impedance equal to the output impedance of the generator and the input impedance of the down-hole instrument.