FIELD: survey of boreholes or wells, particularly to measure fluid flow in oil and gas wells.
SUBSTANCE: device comprises impeller, micromotor and electronic unit. Mocromotor shaft is connected to impeller shaft by means of lapped cylindrical couple and is reinforced with thrust bearing. Material of micromotor shaft located inside lapped cylindrical couple and material of above couple bush has equal thermal expansion coefficients. Micromotor is connected to electronic unit by power supply system and is arranged in sealed case formed of heat insulation material. Internal case pressure is maintained equal to well pressure by means of compensator. The case is provided with heater and temperature sensor connected to electronic unit. Case, heater, temperature sensor and electronic unit are operated in thermostat mode.
EFFECT: increased accuracy of fluid flow measurement.
2 dwg
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