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:
Apr. 08, 1974
Applicant:
Inventors:
John S Rhudy, Littleton, CO (US);
Bruce L Knight, Littleton, CO (US);
Assignee:
Marathon Oil Company, Findlay, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166308 ; 2528 / ;
Abstract
Improved fracturing of subterranean formations with water-based fracturing fluids is obtained by incorporating into an aqueous fracturing fluid (1) a water-soluble, high molecular weight polymer that will crosslink in the presence of chromic ion and (2) controlled amounts of chromic ion to crosslink the polymer to form a gel of desired viscosity. Useful polymers include partially hydrolyzed polyacrylamide and copolymers of acrylamide and sodium acrylate.