FIELD: oil-and-gas industry.
SUBSTANCE: in compliance with this method, two rotary pumps are lowered on flow string. Said pumps are driven by downhole motor with two pro-shaft extensions. Top rotary pump feeds into flow string. Bottom pump serves to break bonds of colmatant and to discharge it in, for example, sludge trap. Top pump serves to change well fluid dynamic level and to force produced fluid to the surface. Development process is controlled from the surface by, for example, control station with frequency inverter of downhole motor.
EFFECT: higher efficiency.
2 dwg
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