id	keyword
eurjchem-2392	pam
eurjchem-2392	polymer
eurjchem-2392	fluid
eurjchem-2392	drilling
eurjchem-2392	temperature
eurjchem-2392	concentration
eurjchem-2392	study
eurjchem-2392	viscosity
eurjchem-2392	pam fluid
eurjchem-2392	effect