Recovery of heavy oil
CA 1300000 C · Owner: British Petroleum Company P.L.C. The · Inventors: Taylor, Alistair S.; Stockwell, Alan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A two stage method for the recover of heavy crude oil or bitumen associated with a solid inorganic substance and water from an underground deposit comprises chemically conditioning the deposit in situ with an aqueous solution of an alkaline compound and subsequently treating the conditioned deposit to recover the heavy crude oil or bitumen from it. The method is particularly suitable for recovering bitumam from tar sand. In situ conditioning increases the yield of product.
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 May 5, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 5, 2009.
- 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.