The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 1984
Filed:
Sep. 28, 1981
Applicant:
Inventor:
Arnold M Walkow, Houston, TX (US);
Assignee:
Dresser Industries, Inc., Dallas, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324 / ;
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.