Methods, apparatus, and systems for obtaining formation information utilizing sensors attached to a casing in a wellbore
CA 2469363 C · Owner: Schlumberger Canada Limited · Inventors: Bailey, Robert; Jundt, Jacques; Salamitou, Philippe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Methods, apparatus, and systems for obtaining information regarding a formation a casing, or fluid within the casing are provided which utilize an interrogator and one or more sensing devices attached to a casing in a wellbore. The interrogator is located within and is typically movable inside the wellbore. The sensing device which is positioned and fixed in an opening cut in the casing includes a housing and a sensor with associated electronic circuitry. The housing of the sensing device is typically adapted to provide a hydraulic seal with the opening in the casing. The interrogator and sensing device communicate in a wireless manner.
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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 May 31, 2004 and granted January 29, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 31, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 2026.
- 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
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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.