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:
Feb. 17, 1976
Filed:
Mar. 07, 1975
Applicant:
Inventors:
Paul S Ossip, Denver, CO (US);
Karl D Dreher, Littleton, CO (US);
Assignee:
Marathon Oil Company, Littleton, CO (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166275 ; 166252 ; 166274 ; 252 / ;
Abstract
Micellar systems which are neither oil-external nor water-external can be formed from petroleum sulfonates, e.g., crude oil sulfonates formulated with water and, optionally, cosurfactants, e.g., hexanol. Because such micellar systems resist uptake of both oil and water, they are suitable for long distance displacement in which injection wells are spaced at least about 300 feet from production wells.