Logging or measurement while tripping
CA 2127476 C · Owner: Pc Vii Industries Ltd. · Inventors: Pomerleau, Daniel G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus are provided for obtaining measurements from a wellbore during tripping operations. A drilling sub is attached to the drillstring adjacent to or as near as possible to the drillbit before commencing normal drilling operations. Prior to commencing tripping operations a logging tool is engaged within the drilling sub. The engagement of the logging tool within the drilling sub opens a window mechanism that enables the sensors of the logging tool to obtain data from the wellbore. As tripping operations are conducted the logging tool obtains data along the length of the wellbore.
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 July 6, 1994 and granted December 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 6, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 2016.
- 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.