Method of creating a zonal isolation in an underground wellbore
CA 2548748 C · Owner: Shell Canada Limited · Inventors: Bloess, Andreas; Cornelissen, Erik Kerst; Kenter, Cornelis Jan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of creating a zonal isolation above a target zone (4) in an underground wellbore (1) comprises: inserting a slurry injection tubing (3) into the wellbore; arranging within an annular space surrounding said tubing an particle accumulation means (5), such as an expandable screen or an area where the slurry velocity is reduced; and pumping a slurry comprising a carrier fluid and granular material down via the slurry injection tubing (3) and the target zone (4) and then up into the annular space such that at least , some granular material accumulates and forms an elongate zonal isolation (10) in the annular space between the target zone and the particle accumulation means, …
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 December 10, 2004 and granted November 6, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 10, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.