Water soluble copolymers containing vinyl imidazole as drilling

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

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166271, 252 855R, 5253267, 525369, 526263, 526287, C08F22802

Patent

active

044710976

ABSTRACT:
Auxiliary agents for chemical flooding of petroleum deposits and auxiliary agents used in well drilling fluids are water-soluble copolymers containing a statistical distribution of

REFERENCES:
patent: 4048077 (1977-09-01), Engelhardt
patent: 4151333 (1979-04-01), Lenke
patent: 4309523 (1982-01-01), Engelhardt

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