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:
Jun. 14, 1988
Filed:
Jun. 02, 1986
Applicant:
Inventor:
Stephan A Mato, Jr, Katy, TX (US);
Assignee:
Western Atlas International, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
324221 ;
Abstract
Method and apparatus for nondestructive inspection of oilfield piping includes first and second pole pieces and a electromagnetic core therebetween for emitting a unidirectional magnetic flux field into the piping. A plurality of detector shoes each house a flux leakage coil assembly and a corresponding eddy current coil assembly. Circuits receive, process and transmit signals from the individual flux leakage coil assemblies to the surface. At the surface each signal is processed individually to provide indications of mass loss and/or gain as detected by each flux leakage coil assembly.