Communication conduit in a well tool
CA 2270236 C · Owner: Pringle, Ronald E. · Inventors: Morris, Arthur J.; Pringle, Ronald E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved apparatus for transmitting signals through a well tool is provided. In a broad aspect, the present invention is a communication conduit in a well tool comprising: a cylindrical mandrel (10) having a longitudinal bore (12) therethrough, an inner diameter (ID) an outer diameter (OD), and an , outside circumference (14); a well tool (16) attached to the outside circumference (14) of the cylindrical mandrel (10); and at least one signal transmitting passageway (18) positioned in the mandrel (10) between the inner diameter and the outer diameter. In a specific embodiment the well tool (16) , may be a packer. The at least one signal transmitting passageway (18) may be used as a …
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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 November 14, 1997 and granted September 23, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 14, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 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.