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The invention discloses a fluid loss reducer for shale gas well cementing and a preparation method thereof; the fluid loss reducer comprises copolymerization monomers of acrylic acid (AA), acrylamide… (More)
The invention relates to a suspended cement plug applicable to continuous oil pipe injection and an application method of the suspended cement plug. The suspended cement plug comprises the following… (More)
The present invention discloses a 1,2-di (2-imidazolin-yl-methylene ether) ethane surfactants and their method of preparation, the structural formula of the surfactant wherein R represents C8 ~ C18… (More)
Two distinct copper coordination polymers, namely [Cu2(2,5-pydc)2(bpp)2]·H2O (1) and Cu2Cu(2,5-pydc)2(bpp)2 (2) (2,5-pydc = pyridine-2,5-dicarboxylic acid, bpp = 1,3-bi(4-pyridyl)propane), have been… (More)