Downhole differential pressure flow density meter

Abstract

The invention discloses an underground differential pressure type flux densimeter. The underground differential pressure type flux densimeter includes an upper body (9) and a lower body (10) that are connected by thread; the tubular walls of the upper body and the lower body are respectively provided with an upper pressure sensing opening and a lower pressure sensing opening (1,7); the inner wall of the lower body (10) is provided with an annular lug boss (11);a differential pressure sensor (4) is embedded in the annular lug loss (11); the upper end of the differential pressure sensor (4) is connected with an upper hollow pressure guide pipe (2); the hollow part of the upper pressure guide pipe (2) and the upper end surface of the differential pressure sensor (4) form an upper protection cavity (3); the lower part in the hole of the annular lug boss (11) is connected with a lower hollow pressure guide pipe (6); the hollow part of the lower pressure guide pipe (6) and the lower end surface of the differential pressure sensor (4) form a lower protection cavity (5); the upper ends and the lower ends of the upper pressure guide pipe (2) and the lower pressure guide pipe (6) are respectively arranged at the locations of the upper pressure sensing opening and the lower pressure sensing opening (1,7). The densimeter can realize to measure the flux and the density of underground liquids only by adopting a differential pressure sensor.

Description

Technical field: [0001] The invention is applied to the field of oil field logging, in particular to a downhole differential pressure flow density meter used for measuring the flow rate and density of liquid produced in an oil well. Background technique: [0002] At present, the flow measurement of domestic oil well cross-annular fluid production profile logging is mainly based on the turbine flowmeter. The flowmeter has a large adsorption capacity for ferromagnetic substances. When it is adsorbed to iron filings and other substances, the measurement results are inaccurate and seriously affect Field application; density is an important parameter of fluid, which is very important for fluid measurement. Differential pressure density meter is a mature density meter. Due to the influence of instrument design, differential pressure density meter has not been used in the field of cross-annular fluid production profile logging. get better application. Invention content: [0003]...

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Problems solved by technology

[0002] At present, the flow measurement of domestic oil well cross-annular fluid production profile logging is mainly based on the turbine flowmeter. The flowmeter has a large adsorption capacity for ferromagnetic substances. When it is adsorbed to iron filings and other substances, the measurement results are inaccurate and seriously affect Field application; density is an important parameter of fluid, which is very important for fluid measurement. Differential pressure density meter is a mature density meter. Due to the influence of instrument design, differential pressure density meter has not been used in the field of cross-annular fluid production profile logging. get better application

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