Method and apparatus for subterranean liquid level measurement

Details Method and apparatus for subterranean liquid level measurement Method and apparatus for subterranean liquid level measurement

1990-08-22

1991-09-17

Cuchlinski, Jr., William A.

Measuring and testing

Liquid level or depth gauge

73298, 116206, 116227, 340620, 436 40, G01F 2322

Patent

active

050483340

ABSTRACT:
A method and an apparatus for determining the thickness of a layer of a first liquid above an interface formed by the first liquid and the second liquid underlying the first liquid in a subterranean formation. The apparatus includes an elongated metal rod having a sharpened distal end. An electrode is provided adjacent the sharpened distal end to indicate when the interface formed by the two liquids has been reached. A lengthwise running elongated slot is provided in the outer surface of the body of the metal rod and contains an indicator strip. The indicator strip is adapted to undergo a color change upon contact with the first liquid. By measuring the length of the indicator strip which has undergone a color change, the thickness of the layer of the first liquid can be determined.

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