Method for correcting well log data for effects of changes in instrument velocity (cable yo-yo)
CA 2318035 A1 · Owner: Jericevic, Zeljko · Inventors: Fabris, Antonio; Jericevic, Zeljko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for correcting data measured by a well logging instrument (3) for effects of cable (2) yo-yo. The data are first preprocessed to reduce magnitude of spatial frequency components in the data occurring within a bandwidth of axial accelaration of the logging instrument (3) which corresponds to the cable (2). Then eigenvalues of a matrix are shifted over , depth intervals where the smallest absolute value one of the eigenvalues changes sign, by an amount such that the smallest absolute value eigenvalue does not change sign. The matrix forms part of a system of linear equations by which the measurements made by the instrument are converted to values of a property of interest of …
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 November 16, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 16, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2021.
- 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.