Secondary recovery process
CA 2093471 A1 · Owner: Rrkt Company · Inventors: Talley, Robert R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In accordance with illustrative embodiments of the present invention a process for the, secondary recovery of oil found in a dolomite formation includes generating in-situ decomposition of the dolomite by heating it to a temperature in the range of from 1,400-1,750° F which produces a reaction that has magnesium and calcium oxides and a large quantity of carbon dioxide as products. The carbon dioxide saturates the oil in surrounding formations and makes it more movable toward one or more recovery wells. The heat is convected into the formation by a fluid that is injected into the well from the surface.
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 April 6, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 6, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2015.
- 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.