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. 26, 1977
Filed:
Aug. 02, 1976
Applicant:
Inventor:
LeRoy W Holm, Fullerton, CA (US);
Assignee:
Union Oil Company of California, Brea, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166273 ; 166270 ;
Abstract
Oil recovery efficiency of tertiary oil recovery processes using a micellar solution as the displacement fluid is improved by injecting a dilute aqueous solution of an alkali metal silicate into the reservoir subsequent to the micellar solution injection and prior to the drive fluid injection. The alkali metal silicate has a M.sub.2 O/SiO.sub.2 ratio of between 1 and 4.