Mono diameter wellbore casing
CA 2467381 C · Owner: Ring, Lev · Inventors: Brisco, David Paul; Ring, Lev; Waddell, Kevin K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method for forming a mono diameter wellbore casing. An adjustable expansion device is positioned in an expandable tubular member. The adjustable expansion device and the expandable tubular member are supported in a bore hole. The adjustable expansion device is lowered out of the expandable tubular member and its outside dimension is increased. The adjustable expansion device is displaced upwardly relative to the expandable tubular member a number of times to radially expand and plastically deform portions of the expandable tubular member within the borehole. An interior region of the expandable tubular member above the adjustable expansion device is pressurized during …
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 November 12, 2002 and granted January 8, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 12, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 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.