DOI: 10.21276/sjet.2017.5.9.2

Pages: 457-460

The roles of drilling fluid in the drilling process are so clear and essential. The objective of designing drilling fluid for extreme and deep environment (HPHT wells) is to develop high performance drilling fluid system in well bore to achieve zonal isolation. The primary objective of drilling fluid is to improve thermo electrical and rheological properties and displacement efficiency of drilling fluid system. Oil well slurries depend on its homogeneity of additive concentrations, quality and quantity to contribute the placement and success of a well drilling cementing operation. The experiments show the increase in the amount of plastic viscosity due to the increase in the amount of nano ferric oxide. Also, the increase in the amount of nano particle increases the amount of viscosity of slurry. It seems each extra 0.2% nano oxide increases the viscosity about 0.2 Pa.s from 0.2% to 0.6%.