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.

Date of Patent:
Dec. 17, 2024

Filed:

Nov. 11, 2021
Applicant:

Baker Hughes Oilfield Operations Llc, Houston, TX (US);

Inventors:

William Johnston, Houston, TX (US);

Paul Wysocki, Blacksburg, VA (US);

Dan Provenzano, Blacksburg, VA (US);

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/293 (2006.01); E21B 47/135 (2012.01); G01V 8/16 (2006.01); H04B 10/25 (2013.01);
U.S. Cl.
CPC ...
E21B 47/135 (2020.05); G01V 8/16 (2013.01); G02B 6/2931 (2013.01); H04B 10/25 (2013.01);
Abstract

An optical system employs a method for measuring an acoustic signal in a wellbore. The optical system includes an optical interrogator and an optical fiber. The optical fiber has a plurality of nominal sites uniformly spaced apart along a longitudinal axis of the optical fiber. A plurality of gratings are formed in the optical fiber. Each of the plurality of gratings is associated with a nominal site and is separated from its associated nominal site by an offset distance. The offset distance is selected to reduce a destructive interference between reflections from the plurality of gratings. The optical interrogator transmits a light pulse into the optical fiber to measure the acoustic signal via a reflection of the light pulse from at least one of the plurality of gratings.


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Johnston, William. (2024). Grating position dithering for improved distributed acoustic sensing engineered fiber performance (U.S. Patent No. 12168928). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12168928

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