Method and apparatus for estimating formation slowness
CA 2594339 C · Owner: Exxonmobil Upstream Research Company · Inventors: Yin, Hezhu; Huang, Xiaojun
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for estimating the slowness of a geological formation using waveforms recorded by an acoustic borehole logging tool. Phase slowness coherence is extracted from the recorded waveforms after transformation to the frequency domain (804) at various frequencies (806) and this is converted into a formation slowness curve (808) which can be used as an objective function from which an anomaly such as a local , maximum or minimum (810) can be identified as representative of an estimate of the formation slowness.
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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 December 22, 2005 and granted October 18, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 22, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.