Method and apparatus for determining the location of a leak in a

Details Method and apparatus for determining the location of a leak in a Method and apparatus for determining the location of a leak in a

1976-12-17

1978-07-18

Krawczewicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

324 64, 340605, G01R 2702

Patent

active

041018273

ABSTRACT:
The location of one or more leaks in a pipe made from an electrically insulating material and which is buried in an electrically conductive medium, typically a pipe buried underground, is determined by filling the pipe with an electrically conductive fluid, e.g. tap water, passing an electrical current through the fluid in such manner as to establish a voltage gradient along the length of the fluid in the pipe and then analyzing the gradient to determine the location of the leak. In one embodiment, the bared end of an insulated conductor connected to one terminal of a voltmeter, the other terminal being grounded, is drawn through the pipe to measure the gradient. In another embodiment, a voltage source is connected to the fluid at opposite ends of the pipe to establish a voltage gradient for the distance between those ends, the voltage drop between the fluid at one end of the pipe and ground is measured and the distance from that end of the pipe to the leak point is determined by the relationship between these two voltages and distances.

REFERENCES:
patent: 1719786 (1929-07-01), Schlumberger
patent: 1895643 (1933-01-01), Putnam
patent: 2123545 (1938-07-01), Pearson
patent: 2172778 (1939-09-01), Taylor, Jr.
patent: 2440044 (1948-04-01), Greenslade
patent: 2694179 (1954-11-01), Walstrom
patent: 2802173 (1957-08-01), Nisle
patent: 2974276 (1961-03-01), Davis
patent: 3548304 (1970-12-01), Lohnes
patent: 3721970 (1973-03-01), Niemoth

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