In situ conversion process systems utilizing wellbores in at least two regions of a formation
CA 2606218 C · Owner: Shell Internationale Research Maatschappij B.V. · Inventors: Hsu, Chia-Fu; Vinegar, Harold J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for heating a subsurface formation is described. The system includes a plurality of elongated heaters (244) located in a plurality of openings in the formation. At least two of the heaters are substantially parallel to each other for at least a portion of the lengths of the heaters. At least two of the heaters have first end portions (234) in a first region of the formation and second end portions (238) in a second region of the formation. A source of time-varying current (254) is configured to apply time-varying current to at least two of the heaters. The first end portions of the heaters are configured to be applied with substantially the same voltage. The second portions …
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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 April 21, 2006 and granted April 15, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 21, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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