High-temperature diverting agent system for the oil industry and corresponding treatment process
CA 1330388 C · Owner: Doerler, Nicole · Inventors: Doerler, Nicole; Piot, Bernard; Lietard, Olivier
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention uses resins which are only partly soluble in oil. In particular, an ethoxylated stearyl alcohol with an HL of 15 will be used. This results in a cake with very low permeability, but which can be easily broken up by inverse flow, and with much greater temperature stability.
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 June 28, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 28, 2011.
- 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.