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:
Jun. 15, 1999
Filed:
May. 27, 1997
Applicant:
Inventor:
Dan Edward Kieke, Sealy, TX (US);
Assignee:
Texaco Inc, White Plains, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
1662701 ; 166400 ; 166275 ; 507206 ; 507248 ; 507250 ; 507259 ; 507936 ;
Abstract
A method for the enhanced recovery of oil comprises injecting into an oil-containing formation an aqueous surfactant system having at least (1) a blend containing an unmodified Kraft lignin, an oil-soluble amine and a water-soluble sulfonate, and (2) water; driving the surfactant system through the formation and producing the oil mobilized by the surfactant system. A surfactant composition useful for enhanced oil recovery methods is also provided having at least an unmodified Kraft lignin, an oil-soluble amine and a water-soluble sulfonate.