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:
Mar. 10, 2026
Filed:
Jan. 26, 2024
Schlumberger Technology Corporation, Sugar Land, TX (US);
Lukasz Zielinski, Cambridge, MA (US);
Ronald E. G. Van Hal, Cambridge, MA (US);
Shawn David Taylor, Cambridge, MA (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
NMR-based lithium measuring and monitoring downhole tools and methods measure at least one lithium concentration of a fluid in a borehole and/or a surrounding formation of the borehole, wherein the downhole tool has an NMR sensor having a magnet-coil geometry with at least one magnet and a RF coil tuned to match a Larmor frequency of a nucleus of lithium. The downhole tools and methods acquire an NMR-based lithium concentration measurement of a fluid at a sensitive region within the wellbore and/or formation that is defined by the magnet-coil geometry of the NMR sensor and determine a lithium concentration of the fluid at the sensitive region based on the acquired NMR-based lithium concentration measurement. The downhole tools and methods may interpret an acquired signal based on relaxation distributions of total acquired signals, wherein the acquired signal is indicative of the acquired NMR-based lithium concentration measurement and separate a lithium signal from confounding signals deriving from other non-lithium nuclei based on the interpretated acquired signal.