Method for determining a natural current flow in well casing

Details Method for determining a natural current flow in well casing Method for determining a natural current flow in well casing

1981-09-28

1984-02-14

Krawczewicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

G01R 2702

Patent

active

044319649

ABSTRACT:
A method is provided for determining the natural current flow in the casing of a well. The method includes measuring the native voltage between two locations in the casing during natural current flow conditions. A known electrical current is then passed through the well casing and the voltage between the two locations is measured again. The casing resistance between the two locations is then determined from the voltage measurements and known electrical current. The native current flow in the casing is then determined from the native voltage measurement and the casing resistance.

REFERENCES:
patent: 2459196 (1949-01-01), Stewart
patent: 2553350 (1951-05-01), Bayhi
patent: 2896159 (1959-07-01), Webster
patent: 2922103 (1960-01-01), Smith
patent: 3207981 (1965-09-01), Marsh et al.
patent: 3995213 (1976-11-01), Robinson et al.
patent: 4048558 (1977-09-01), Goodman
patent: 4178543 (1979-12-01), Wrinn et al.

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