Determining impedance of material behind a casing in a borehole
CA 2579953 C · Owner: Froelich, Benoit · Inventors: Legendre, Emmanuel; Froelich, Benoit
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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A method for estimating an impedance of a material behind a casing wall in a borehole, the method comprises exciting (602) the casing wall with an acoustic pulse, and measuring (603) an experimental acoustic waveform (W) reflected from the casing wall. The method further comprises initializing (600) an impedance parameter (Zin), computing (601) an inverse casing response (Rcas - 1) as a function of the impedance parameter and deconvoluting (604) the , experimental acoustic waveform with the inverse casing response to obtain a transducer response (T). An iterative loop (605 606, 607) is performed, comprising the computing of an inverse casing response and the deconvoluting of the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed September 8, 2005 and granted November 24, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 8, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.