FIELD: oil production industry. SUBSTANCE: according to method, run into well by rope or scraper wire down to depth below lower level of ground freezing depth is turbine-type flow rate sensor with converter of rotation speed into code-pulse signals corresponding to flow rate. Coded signals are recorded in electronic memory according to program preset by timer. Electronic memory and timer are accommodated in subsurface flow rate sensor. Recorded code-pulse signals are decoded and processed with the help of computer after lifting flow rate sensor out of well. EFFECT: high efficiency.
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