Pulsed ultrasonic doppler borehole fluid measuring apparatus

Details Pulsed ultrasonic doppler borehole fluid measuring apparatus Pulsed ultrasonic doppler borehole fluid measuring apparatus

1989-08-03

1990-08-14

Williams, Hezron E.

Measuring and testing

Borehole or drilling

Downhole test

7386125, E21B 4710

Patent

active

049476831

ABSTRACT:
A measuring device for use in a producing well is set forth. It includes a sonde having upper and lower centralizers to define an annular flow space therearound. In the preferred embodiment, a motor driven sensor preferably a piezoelectric combination transmitter and receiver is, included to transmit and then receive ultrasonic pulses. They are transmitted downwardly from the housing into fluid flowing in the well. Reflective interfaces are defined by material differences. Gas bubbles droplets and particles in the fluid flow and phases between oil and water, etc. form reflective interfaces to create a scattering effect to transmitted ultrasonic pulses so that a return pulse is formed. The pulses encodes fluid flow velocity as a result of the Doppler shift.

REFERENCES:
patent: 4413531 (1983-11-01), Karplus et al.
patent: 4433573 (1984-02-01), Hulin
patent: 4452077 (1984-06-01), Siegfried, II
patent: 4527425 (1985-07-01), Stockton

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