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:
Nov. 04, 2025
Filed:
Apr. 15, 2024
Schlumberger Technology Corporation, Sugar Land, TX (US);
Yong-Hua Chen, Cambridge, MA (US);
Dzevat Omeragic, Lexington, MA (US);
Lin Liang, Cambridge, MA (US);
Saad Omar, Cambridge, MA (US);
SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US);
Abstract
A system and apparatus are described for measuring magnetic flux in a wellbore casing. In an example, the apparatus includes a primary magnet and a sensor for measuring magnetic flux in the wellbore casing created by the primary magnet. The primary magnet can have magnetic pole pieces at either end that help guide the magnetic flux into the wellbore casing. Focusing magnets can be placed on both ends of the primary magnet so that the focusing magnets are separated from the primary magnet by the magnetic pole pieces. The magnetic flux created by the focusing magnets reduces dispersion of the primary magnet's magnetic flux by forcing magnetic flux from the primary magnet that would otherwise disperse to flow toward the sensor. The sensor can output a signal with magnetic flux readings. A computing device can receive the signal and detect discontinuities in the wellbore casing.