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:
Sep. 22, 1981
Filed:
May. 08, 1972
Applicant:
Inventors:
Dustin L Free, Tulsa, OK (US);
Howard M Phillips, Oklahoma City, OK (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
166281 ; 166295 ; 166307 ;
Abstract
To reduce the production of water from a subsurface hydrocarbon-bearing interval of a formation the producing interval of the formation is treated with an aqueous solution or sol of a high molecular weight, water soluble polyacrylamide (PAM). The polymer which is absorbed in the formation is crosslinked in situ, e.g. by subsequently flushing the formation with a crosslinking solution.