The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 26, 1985
Filed:
Mar. 31, 1983
Hiroshi Morita, Chiba, JP;
Yasuyuki Kawada, Funabashi, JP;
Junichi Yamada, Chiba, JP;
Toshiyuki Ukigai, Chiba, JP;
Lion Corporation, Tokyo, JP;
Abstract
A micellar slug for use in the recovery of oil, the slug containing a hydrocarbon, an aqueous medium, a surfactant, and a cosurfactant. The surfactant contains as an essential component an internal olefin sulfonate or sulfonates having 10 to 26 carbon atoms and having the specified compositions. This micellar slug has an excellent capability for decreasing an interfacial tension between oil and micro-emulsions and between water and micro-emulsions and an excellent salinity tolerance at a wide salt concentration range. Furthermore, the micro-emulsion can be maintained stable during the sweeping in the subterranean reservoirs even when the salt concentration of the formation water is changed.