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. 07, 1984
Filed:
Sep. 23, 1981
Donald G Hill, Tulsa County, OK (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
The process of initiating and/or extending a fracture in a subterranean formation penetrated by a wellbore which comprises injecting a crosslinked aqueous gelled fracturing fluid through the wellbore and against the formation at a flow rate and pressure sufficient to initiate and/or extend a fracture in the formation is improved by including in the fracturing fluid at least one compatible, water-soluble, aliphatic, cationic polymer bearing a plurality of pendant quaternary ammonium groups. Said pendant quaternary ammonium groups are separated from the polymer backbone by at least two carbon atoms and have an ethylene, --CH.sub.2 CH.sub.2 --, as one of the substituents chemically bonded to the nitrogen atom. As an example, a homopolymer of