Bottom plug for forming a mono diameter wellbore casing
CA 2499007 C · Owner: Enventure Global Technology · Inventors: Watson, Brock Wayne; Brisco, David Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bottom plug and a method of using a bottom plug for forming a mono diameter wellbore casing is provided that includes an expandable packer initially attached below an expansion device. A packer setting mechanism is coupled between the expansion device and the packer for expanding a packer and sealingly setting it in an expanded portion of the wellbore casing. A release mechanism is coupled between the expansion device and the packer for releasing packer from the expansion device. Fluid is pumped into the casing between the cone and the packer to force the expansion device into and through an unexpanded portion of casing thereby expanding the casing.
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 September 22, 2003 and granted August 7, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2025.
- 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.