Tubular expansion method
CA 2840348 C · Owner: Baker Hughes Incorporated · Inventors: Rosenblatt, Steve; Mcmahan, Michael E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of expanding a tubular downhole comprises providing an expansion tool comprising a pair of seals spaced from each other on a body; positioning the tubular and the expansion tool in a wellbore; pressurizing the tubular between the seals; expanding the tubular; providing opposed cup seals as the seals; flexing at least one of the cup seals inwardly toward the body; and repositioning the body with respect to the tubular.
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 31, 2003 and granted October 13, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 31, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 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.