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:
Sep. 15, 2026
Filed:
Aug. 26, 2024
Schlumberger Technology Corporation, Sugar Land, TX (US);
Shin Utsuzawa, Sugar Land, TX (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
The method includes performing, using a nuclear magnetic resonance (NMR) tool, a Carr-Purcell-Meiboom-Gill (CPMG) measurement by transmitting a first excitation pulse and a first plurality of refocusing pulses, and obtaining a first set of NMR echo signals. The method also includes performing a modified CPMG measurement by transmitting a second excitation pulse and a second plurality of refocusing pulses, and obtaining a second set of NMR echo signals. The second excitation pulse is shifted by 0 or π radians relative to the first excitation pulse. A first refocusing pulse of the second plurality of refocusing pulses is shifted by 0 or π radians relative to the second excitation pulse. A subsequent refocusing pulses are shifted by π/2 or −π/2 radians relative to the second excitation pulse. Further, the method includes obtaining a transient-corrected echo train based on the CPMG measurement and the modified CPMG measurement.
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