Method and tool for placing a well bore liner
CA 2540990 C · Owner: Bbj Tools Inc. · Inventors: Cote, Bradley R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A well bore liner placement method and apparatus including inserting a liner running assembly carrying a liner into a well bore the assembly including a liner placement apparatus having an annular seal extending radially to sealingly engage the well bore and pumping fluid into the annulus above the annular seal until fluid pressure on the upper surface area of the annular seal creates a force exceeding opposing bottomhole forces below the annular seal and thereby driving the liner down the well bore.
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 March 21, 2006 and granted November 24, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 21, 2026.
- 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.