Compositions – Leather or fur treating
Patent
1989-01-09
1990-06-05
Terapane, John F.
Compositions
Leather or fur treating
166270, 166274, 166275, E21B 4322
Patent
active
049311948
ABSTRACT:
The recovery of oil or gas from underground porous formations bearing such hydrocarbons is enhanced by using an injection fluid containing a viscosifying amount of a poly(vinylamine) formed in-situ by hydrolysis of a high molecular weight poly(N-vinylamide). The hydrolysis conditions are strongly acidic or highly alkaline and include the elevated temperature of the formation.
The poly(N-vinylamide), such as poly(N-vinylformamide), can be made by inverse emulsion polymerization and the high solids emulsion mixed directly with the acidic or basic solutions to form the injection fluid.
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Lai Ta-Wang
Pinschmidt, Jr. Robert K.
Marsh William F.
Rodgers Mark L.
Sayala Chhaya
Simmons James C.
Terapane John F.
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