High pressure casing patch
CA 2198163 C · Owner: Baker Hughes Incorporated · Inventors: Macrae, Jonathan; Lynde, Gerald D.; Flanders, Bruce A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of preparing a downhole casing tubular and a casing patch apparatus for connecting onto a stub casing in a wellbore are provided. The casing, patch apparatus includes a tubular body having an opening large enough to pass over, the stub. The casing patch also includes a seal assembly having at least one cantilevered fin mounted within the body. The fin has an initial inner diameter, smaller than the outer diameter of the stub such that it is deflected as the body is, advanced over the stub. The fin provides a metal-to-metal seal between the body and, the stub. A gripping assembly holds the body to the stub.
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 February 21, 1997 and granted December 2, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 21, 2019.
- 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.