Well casing corrosion meter

Details Well casing corrosion meter Well casing corrosion meter

1975-08-11

1976-12-21

Krawczewicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

23253C, 204195C, G01R 2702

Patent

active

039991210

ABSTRACT:
Apparatus for making a surface measurement of well casing external corrosion current including a voltmeter, a variable current source, a reference electrode, and a ground electrode. Current is coupled to the well casing to ground circuit by means of the ground electrode to cause a preselected small, less than 0.02 volt, potential change in the well casing relative to the reference electrode. The voltmeter is used to measure the applied current level which is, for a fixed casing potential change, proportional to well casing corrosion current.

REFERENCES:
patent: 3406101 (1968-10-01), Kilpatrick
patent: 3684679 (1972-08-01), Smith et al.

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