Effect of some prepared superplasticizers on the rheology and setting time of the oil well cement slurries

Abstract

Oil-well cementing is considered as one of the most critical operations in petroleum and gas industry. Therefore, it becomes one of the most interesting areas of research for the last decades. Oil well cementing is less tolerant of errors than conventional cementing works. If the cement does not provide a good seal, gas or liquid fluids can migrate to the surface and lead to work accidents or environmental problems. So, the full understanding of interfacial phenomena behind oil well cement procedures has scientific, economic and environmental importance. Chemical admixtures have become one of the essential components of cement in cementing technology in recent years. Various chemical admixtures different in composition have been offered to the users today in response to the needs of the construction market. The major type of admixtures which used in oil well cementing is superplasticizers (high range water reducers). This investigation is divided into three sections: Part I Part I aims to preparation of the superplasticizers particularly sulfanilic acid-cyclohexanone formaldehyde (CFS), sulfanilic acid-acetone formaldehyde (AFS), sulfanilic acid-cyclohexanone glyoxylic (CGS), sulfanilic acid-acetone glyoxylic (AGS) and sulfanilic acid-melamine glyoxylic (MGS), confirm their structures using FTIR spectra. Part II Study the effect of the prepared superplasticizers on the water of consistency and setting time. On the basis of the results obtained in this investigation, the conclusions could be derived: