Mono-diameter wellbore casing
CA 2428819 A1 · Owner: Filippov, Andrei Gregory · Inventors: Zwald, Edwin Arnold Jr.; Filippov, Andrei Gregory; Cook, Robert Lance
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Plastically deforming and radially expanding a first tubular member (155) within a wellbore (10) form a mono-diameter wellbore casing. A second tubular member (200) is then plastically deformed and radially expanded overlapping , the first tubular member (155). Then the second tubular (200) and the overlapped portion of the first tubular (155) are expanded.
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 2, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 2, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 2, 2024.
- 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.