FIELD: operation of oil wells, particularly, research of operating wells. SUBSTANCE: device has ejector pump with active nozzle, mixing chamber, diffuser and channel for supply of fluid pumped out of formation and shutoff member with seat installed parallel to ejector pump. In this case, logging cable with connected geophysical instrument is passed through axial channel of shutoff member. Active nozzle with mixing chamber is directed upward. Installed in gap between ejector pump casing and casing string well, against mixing chamber is self-sealing collar. EFFECT: higher efficiency and reliability. 1 dwg
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