Foaming acid-containing fluids
CA 1280883 C · Owner: Watkins, David R. · Inventors: Watkins, David R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Foamed treating fluids contain an acid component, a gas, optionally an organic solvent and emulsifying agent, and, as a foaming agent a mixture of a, quaternary ammonium halide cationic surface active agent and either an alkylamine alkylamine oxide surface active agent or a betaine amphoteric surface active agent. Such treating fluids can be used to dissolve acid-soluble components from various surfaces, such as a subterranean reservoir penetrated by a well, the well itself or an, industrial vessel or conduit containing a scale.
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 March 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 2008.
- 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.