Deep-well thermal flowmeter

Details Deep-well thermal flowmeter Deep-well thermal flowmeter

1991-05-30

1993-07-13

Williams, Hezron E.

Measuring and testing

Borehole or drilling

Downhole test

7386195, 1662415, G01F 1704, G01F 168, E21B 4700

Patent

active

052263339

ABSTRACT:
The flowmeter includes a planar wire grid immersed in the fluid flow perpendicular to the direction of fluid flow. Capacitors discharge an electrical current through the wire grid to heat the wire grid and thereby produce, by heat conduction, a thermopulse in the fluid. Temperature detectors are provided on both sides of the wire grid to detect the thermopulse. A timing device is provided for measuring the time interval between production of the thermopulse and detection thereof by the detectors. The time interval is representative of the flow rate of the fluid flow.

REFERENCES:
patent: 1254374 (1918-01-01), Thomas
patent: 1260498 (1918-03-01), Wilson
patent: 2580182 (1951-12-01), Morgan et al.
patent: 2697941 (1954-12-01), Moore et al.
patent: 2733605 (1956-02-01), Buck
patent: 3922912 (1975-12-01), Bradbury et al.
Albert, Henry J., and Robert H. Wood, "High-Pressure, thermal-pulse, liquid flow meter", Rev. Sci. Instrum. 56(10) Oct. 1985, pp. 1962-1963.

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