FIELD: oil production industry. SUBSTANCE: geophysical instrument which is lowered by cable into well together with pusher and weight-mover is additionally provided with float-type members located on ends of geophysical instrument. Average density of float-type members together with geophysical instrument is lower than density of oil being pumped out from well. Application of aforesaid instrument allows for higher accuracy in measuring flow rate and composition of liquid in horizontal low-output wells. EFFECT: higher efficiency. 1 dwg
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