Desenvolvimento de argilas organofílicas para uso em fluídos de perfuração base óleo – parte II.

Abstract

The organophilic clays are prepared from bentonite clay treated in aqueous way with ionic surfactants, which are incorporated in the interlayer of clay mineral surface, covering the organic layer, so that the naturally hydrophilic clay becomes hydrophobic. The variables of process are of fundamental importance for the production of organophilic clays, variables such as speed of agitation, temperature and time of cure, influencing directly in plastic and apparent viscosities of the dispersions, which together with variables of the organofilization that are time and temperature of cure of organofilization has direct influence on the efficiency of the organofilization. This work proposes a study of these variables, using the Brasgel PA and Cloisite Na + bentonite clays treated with the ionic surfactants Praepagem HY and Praepagem WB. Were measured plastic viscosity and apparent of dispersion and the organophilic clays obtained were characterized by X-ray diffraction and then made a correlation between the results of intercalation and the variables involved in the processes. It was observed that both the variables involved in the process of dispersion of clay and in organofilization, in terms of characterization, have no influence on intensity and in the position of the peak displacement, and has influence on the rheological properties.