In-situ production of bitumen
CA 2252192 C · Owner: Shell Canada Limited · Inventors: Parsons, Leslie James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for in-situ production of bitumen comprises a steam injection well system (4) which comprises a number of lateral sections (10) that traverse the bitumen bearing formation (14) partly above a basal water transition and/or thief zone (15) such that a tip (17) of each lateral section (10) protrudes from the bitumen bearing formation (14) into the basal water transition and/or thief zone (15). The steam that initially flows via said tips (17) into the basal water transition and/or thief zone (15) promotes a rapid steam chamber growth into the bitumen bearing formation (14) and a quick mobilization and recovery of bitumen.
Read the whole patent
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 October 29, 1998 and granted June 6, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 29, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 29, 2020.
- 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.