Salinity tolerant surfactant oil recovery process
CA 1066612 A · Owner: Texaco Development Corporation · Inventors: Carlin, Joseph T.; Mills, Melvin E. (Jr.); Ware, James W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
SALINITY TOLERANT SURFACTANT OIL RECOVERY PROCESS (D#74,495-F), ABSTRACT OF THE DISCLOSURE Primary anionic surfactants such as organic sulfonates are effective for recovering oil from subterranean formations only if the salinity and/or hardness of the formation water is relatively low. In petroleum formations containing high salinity, or hard water either, the high salinity water must be displaced by a preflush or the primary anionic surfactant must be used in conjunction with an effective solubilizing co-surfactant such as, ethoxylated alcohols or alkyl phenols or alkyl or alkylaryl, thiols, as well as sulfated or sulfonated ethoxylated, alcohols or alkyl phenols. Optimum performance is …
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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 November 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 20, 1996.
- 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
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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.