Measuring and testing – Liquid level or depth gauge
Patent
1984-01-09
1985-06-18
Yasich, Daniel M.
Measuring and testing
Liquid level or depth gauge
73304R, 340860, 367908, G01F 2322, G08B 2100
Patent
active
045234655
ABSTRACT:
An acoustic system is provided for measuring the fluid level in oil, gas or water wells under pressure conditions that does not require an electrical link to the surface for level detection. A battery powered sound transmitter is integrated with a liquid sensor in the form of a conductivity probe, enclosed in a sealed housing which is lowered into a well by means of a wire line reel assembly. The sound transmitter generates an intense identifiable acoustic emission when the sensor contacts liquid in the well. The acoustic emissions propagate up the well which functions as a waveguide and are detected by an acoustic transducer. The output signal from the transducer is filtered to provide noise rejection outside of the acoustic signal spectrum. The filtered signal is used to indicate to an operator the liquid level in the well has been reached and the depth is read from a footage counter coupled with the wire line reel assembly at the instant the sound signal is received.
REFERENCES:
patent: 3255882 (1966-06-01), McCarty et al.
patent: 3668630 (1972-06-01), Radin et al.
patent: 3781783 (1973-12-01), Tucker
patent: 3909948 (1975-10-01), Markfelt
patent: 4123753 (1978-10-01), Gravert
patent: 4279078 (1981-07-01), Hinshaw et al.
Ernest John H.
Evans Donald M.
Fasching George E.
Breeden David E.
Hamel Stephen D.
Hightower Judson R.
The United States of America as represented by the United States
Yasich Daniel M.
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