Remote actuation of a downhole tool
CA 2584973 C · Owner: Weatherford Technology Holdings, Llc · Inventors: Macleod, Iain Morrison; Purkis, Daniel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for operating a downhole tool (20) . The method comprises the steps of providing a conduit (26) for the passage of fluid therethrough. The conduit (26) comprises at least one reader which can read data and which is also arranged for the passage of fluid therethrough. The method further includes coupling a downhole tool (20) to the or each reader and providing at least one tag. The or each tag is capable of containing data. The method also includes moving the or each tag within the conduit (26) and at least partially through the reader such that the reader is capable of reading data from the tag when the tag passes through the reader. This method enables …
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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 22, 2005 and granted September 20, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.