Water-wetting treatment for reducing water coning in an oil reservoir
CA 2018951 C · Owner: Alberta Oil Sands Technology And Research Authority · Inventors: Kisman, Kenneth Edwin; Russell, Boyd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oil well producing water is treated to reduce the water cut by injecting through the well into the reservoir a composite slug comprising:, - a relatively small volume of water-wetting agent in liquid form, said agent being adapted to modify the reservoir matrix to increase its water-wetted character; and, - a relatively large volume of non-condensable gas for further laterally extending the matrix surface modification.
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 June 13, 1990 and granted March 26, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 13, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 13, 2012.
- 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.