Gravity concentrated carbon dioxide eor process
CA 2216059 C · Owner: Kenyon, Douglas E. · Inventors: Wadleigh, Eugene E.; Kenyon, Douglas E.; Bowzer, James L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to the recovery of oil from an oil-bearing formation having a natural fracture network with substantial vertical communication and wherein gravity drainage is the primary means of recovery. A downwardly inflating gas-cap is pressured up with a chase gas having a density less than that of CO2.CO2 is injected and a CO2-rich displacing slug is formed at the gas-liquid hydrocarbon contact. The chase gas is injected to facilitate displacing downwardly the CO2-rich displacing slug to recover hydrocarbon from the reservoir. CO2 is replaced in the displacing slug as the CO2 is solubilized into the oil including, matrix oil, to facilitate recovery thereof. The oil is recovered …
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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, 1997 and granted September 25, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2019.
- 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.