Recovering oil by injecting hot co.sub.2 into a reservoir containing swelling clay
CA 1258619 A · Owner: Shell Internationale Research Maatschappij B.V. · Inventors: Harrigal, Robert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure In a heavy oil reservoir containing water-sensitive clay which impedes injections of either steam or cold CO2 oil is produced by in-, jecting CO2 vapor at more than about 130°F at a pressure below the critical pressure for the CO2 or fracturing pressure for the reservoir.
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
- Granted August 22, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 22, 2006.
- 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.