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:
Aug. 10, 1982
Filed:
Jan. 02, 1981
Applicant:
Inventors:
Charles J Norton, Denver, CO (US);
David O Falk, Denver, CO (US);
Assignee:
Marathon Oil Company, Findlay, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
166281 ; 166288 ; 166295 ; 166300 ;
Abstract
A process for selectively reducing the permeability of a subterranean formation penetrated by a well bore and having an injection surface plugged by crosslinked dry polymer. The process comprises the sequential injection of an aqueous solution containing an oxidizing agent, an aqueous spacer medium, and an aqueous solution having at least one dry polymer dissolved therein. Sequential injection of these aqueous solutions can be repeated to achieve the desired degree of injectivity and permeability reduction.