C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/2, 31/22, 40
C08F 220/00 (2006.01) C08F 220/56 (2006.01) C08F 226/00 (2006.01) C08F 228/00 (2006.01) C08F 230/00 (2006.01) C09K 8/588 (2006.01)
Patent
CA 1189649
ABSTRACT OF THE DISCLOSURE New copolymers soluble in water and aqueous acids arc disclosed comprising in a statistical distribution in the macromolecule at least 5% by weight of entities containing a formylamino functionality and at least 10% by weight of entities containing an amino carbonyl functionality, which are stable in high concentrations of Bronsted-Lowery acids and can be used as friction reducers in the stimulation of oil or gas wells.
392248
Dawson Jeffrey C.
Engelhardt Friedrich
Kuhlein Klaus
Reed Anthony R.
Riegel Ulrich
Cassella Aktiengesellschaft
Dresser Industries Inc.
Fetherstonhaugh & Co.
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