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Title: Wireless remote liquid level detector and indicator for well testing

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.

Inventors:
 [1];  [2];  [1]
  1. (Morgantown, WV)
  2. (Point Marion, PA)
Issue Date:
Research Org.:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
OSTI Identifier:
865482
Patent Number(s):
4523465
Assignee:
United States of America as represented by United States (Washington, DC) NETL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
wireless; remote; liquid; level; detector; indicator; testing; acoustic; provided; measuring; fluid; oil; gas; water; pressure; conditions; require; electrical; link; surface; detection; battery; powered; sound; transmitter; integrated; sensor; form; conductivity; probe; enclosed; sealed; housing; lowered; means; wire; line; reel; assembly; generates; intense; identifiable; emission; contacts; emissions; propagate; functions; waveguide; detected; transducer; output; signal; filtered; provide; noise; rejection; outside; spectrum; indicate; operator; reached; depth; footage; counter; coupled; instant; received; battery power; acoustic transducer; pressure conditions; output signal; liquid level; acoustic emission; acoustic emissions; level detector; sealed housing; acoustic signal; filtered signal; fluid level; battery powered; /367/73/

Citation Formats

Fasching, George E., Evans, Donald M., and Ernest, John H. Wireless remote liquid level detector and indicator for well testing. United States: N. p., 1985. Web.
Fasching, George E., Evans, Donald M., & Ernest, John H. Wireless remote liquid level detector and indicator for well testing. United States.
Fasching, George E., Evans, Donald M., and Ernest, John H. Tue . "Wireless remote liquid level detector and indicator for well testing". United States. https://www.osti.gov/servlets/purl/865482.
@article{osti_865482,
title = {Wireless remote liquid level detector and indicator for well testing},
author = {Fasching, George E. and Evans, Donald M. and Ernest, John H.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

Patent:

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