Wells – Processes – Placing fluid into the formation
Patent
1981-09-23
1984-08-07
Suchfield, George A.
Wells
Processes
Placing fluid into the formation
252 855R, E21B 43267
Patent
active
044638108
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
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Suchfield George A.
The Dow Chemical Company
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