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:
Jul. 07, 1981
Filed:
Dec. 10, 1979
Applicant:
Inventors:
Mohan V Kudchadker, Houston, TX (US);
George Kalfoglou, Houston, TX (US);
Lawrence E Whittington, Katy, TX (US);
Assignee:
Texaco Inc., White Plains, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166266 ; 166273 ;
Abstract
An improved surfactant waterflood method for the recovery of oil from a subterranean reservoir utilizing an anionic surface-active agent wherein an aqueous postflush slug containing a nonionic solubilizer is employed to minimize retention of the surface-active agent in the reservoir matrix.