Retrievable packer
CA 2059161 A1 · Owner: Arizmendi, Napoleon · Inventors: Arizmendi, Napoleon; Rubbo, Richard P.; Jordan, Henry J. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The apparatus of the present invention is a retrievable packer which provides for release between a mandrel and a packing element support structure by virtue of a rotational movement. The apparatus is configured so that the packer can be set by letting up on a tubing string or In some applica-, tions where sufficient weight is unavailable by pulling up, on the tubing string. The slips feature a locking mechanism to secure the packing element against the wellbore. A release mechanism is provided to defeat the lock mechanism and to act upon the slips to draw them inwardly so the apparatus can be removed from 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 January 10, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 2014.
- 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.