effect of polyanionic cellulose polymer nanoparticles on rheological properties of drilling mud

polyanionic cellulose polymer is used as an additive in drilling mud in order to decrease water loss and mudcake- thickness. in this study effect of bulk and nanosize polyanionic cellulose on water loss and mud-cakethickness in mud drilling is investigated. polyanionic cellulose nanoparticles are made by using of ball milling. size of nanoparticles is measured by particle size analyzer. polyanionic cellulose and polyanionic cellulose nanoparticles which were prepared by hamilton batch mixer and with certain percent suggested by api, were added to water-based mud drilling. filter press system is used to measure the amount of water loss and mud cake thickness. it was found that adding polyanionic cellulose nanoparticles in comparison with conventional polyanionic cellulose resulted in desirable reduction of amount of water loss and mud cake thickness.