Novel branched or crosslinked polymers containing (meth)acrylamidopropyltrimethyl ammonium halide; (meth)acrylic acid or 2-(meth)acrylamido-2-methylpropane sulfonic acid; methylene bis-acryamide and the like; and a C.sub.4 -C.sub.22 alkyl (meth) acrylate and the use thereof in papermaking, subterranean well drilling and well cementing operations is disclosed.

A novela ramificou ou crosslinked conter dos polímeros (halide do ammonium do meth)acrylamidopropyltrimethyl; (ácido meth)acrylic ou ácido 2-(meth)acrylamido-2-methylpropane sulfonic; bis-acryamide-acryamide do metileno e o gosto; e um C.sub.4 - o acrylate C.sub.22 alkyl (do meth) e o uso disso no papermaking, em perfurar subterranean do poço e em operações cementing boas são divulgados.