A device for introducing a high pressure fluid into well head components
CA 2357446 C · Owner: Canadian Wellhead Isolation Corporation · Inventors: Winzer, Colin David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for introducing high-pressure fluid through a well having a vertical passage with at least one valve and into a well having a well tubing into said vertical passage has a lower part removably attachable to the well tubing a hollow mandrel adapted to extend through the inner passage of the lower part and having a passage through which a high pressure fluid can be introduced an upper part firmly connected with the mandrel to hold the mandrel and movable relative to the lower part between a distal position in which the upper part is spaced from the lower part and the mandrel is not introduced into the well tubing and a proximal position in which the upper part is located close to the …
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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 14, 2001 and granted December 2, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 14, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 2023.
- 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.