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:
Feb. 15, 2022
Filed:
Sep. 10, 2017
Applicant:
Shanjun LI, Katy, TX (US);
Inventor:
Shanjun Li, Katy, TX (US);
Assignee:
Other;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01V 3/24 (2006.01); G01V 3/38 (2006.01);
U.S. Cl.
CPC ...
G01V 3/24 (2013.01); G01V 3/38 (2013.01);
Abstract
The present invention provides a methodology and system for determining formation resistivity beyond a casing. Using devices to generate, direct, and measure electric signals, the travel speed, travel time, attenuation and phase shift of an electric signal traveling through the casing can be measured. Applying a relationship between the travel speed or travel time of an electric signal and the formation resistivity beyond a casing, it is then possible to determine the formation resistivity beyond a casing by measuring the travel speed or travel time or phase shift or attenuation of an electric signal.