DOWNHOLE FLOWMETER Russian patent published in 2002 - IPC

FIELD: geophysical survey of operating oil and gas wells. SUBSTANCE: downhole flowmeter has body, converter of rotation speed into electric signals, centralizer, and turbine. Device also has electric motor with reducing gear for forced rotation, and remote rotating lever. Turbine is located parallel to longitudinal axis of lever over its entire length. For increase of accuracy of flow rate measurement, due to fuller shutoff of wellbore cross-section, flowmeter is provided with additional lever whose one end is hinged with the first lever, and its other end is connected with instrument body. EFFECT: higher accuracy of flow rate measurement due to fuller shutoff of wellbore cross-section, extended range of measurement of fluid flow rate including wellbore with low specific flow rates. 2 cl, 3 dwg