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. 28, 2021
Filed:
Mar. 27, 2018
Applicant:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Inventors:
Yang Liu, Cambridge, MA (US);
Bikash K. Sinha, Cambridge, MA (US);
Smaine Zeroug, Lexington, MA (US);
Assignee:
SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 47/047 (2012.01); E21B 47/16 (2006.01); G01V 1/50 (2006.01);
U.S. Cl.
CPC ...
E21B 47/047 (2020.05); E21B 47/16 (2013.01); G01V 1/50 (2013.01); G01V 2210/6161 (2013.01); G01V 2210/6169 (2013.01);
Abstract
Methods are provided for estimating a quality of cement in the annuli of a multi-string wellbore. Wideband acoustic energy signals are generated and detected in the wellbore and are processed to obtain indications of wideband casing-formation phase slowness dispersions in the wellbore. The indications are compared to reference wideband model casing-formation phase slowness dispersions in order to estimate status of cement or lack of cement in the annuli at that location based on the results of the comparison.