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:
Jan. 03, 2023
Filed:
Aug. 17, 2020
Applicant:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Inventors:
Yiqiao Tang, Belmont, MA (US);
Reda Karoum, Houston, TX (US);
Yi-Qiao Song, Newton Center, MA (US);
Shin Utsuzawa, Sugar Land, TX (US);
Stephen Cliffe, Houston, TX (US);
Assignee:
SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V 3/32 (2006.01); G01N 24/08 (2006.01); E21B 49/08 (2006.01); G01R 33/44 (2006.01);
U.S. Cl.
CPC ...
G01V 3/32 (2013.01); E21B 49/088 (2013.01); E21B 49/0875 (2020.05); G01N 24/081 (2013.01); G01R 33/448 (2013.01);
Abstract
A method for evaluating drilling fluid includes making an NMR measurement of a sample of the drilling fluid and inverting the measurements to compute a corresponding T1T2 plot. The T1T2 plot is in turn evaluated to characterize the drilling fluid. In one embodiment, a stability index of the fluid may be computed from multiple NMR measurements made while aging the sample.