Removing irregularities from seismic data caused by tube waves
CA 2446270 C · Owner: Plessix, Rene-Edouard Andre Michel · Inventors: Mulder, William Alexander; Plessix, Rene-Edouard Andre Michel; Fehmers, Gijsbert Christiaan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method of removing irregularities caused by tube waves from seismic data obtained in a borehole seismic survey, which method comprises the steps of (a) obtaining a set of original seismic data; (b) subjecting the original seismic data set to a time-shift based on an estimated tube wave velocity to align the tube waves in time; (c) applying a structurally oriented edge-preserving , filter to the time-shifted seismic data set; (d) undoing the time shift for the time-shifted, predicted tube wave data set; (e) subtracting the predicted tube wave data set from the original seismic data set; (f) subjecting the set of corrected, original seismic data to a time-shift based on a tube wave …
Read the whole patent
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 May 6, 2002 and granted March 5, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 6, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 2024.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.