Analysis of drilling fluid flow in the annulus of drill string through computational fluid dynamics

Abstract During an oil and gas well drilling the fluids are pumped through drill string to cool lubricate bit. This also serves purpose of bringing rock cutting back surface various other purposes like pressure control maintain bore stability. As is drilled casing lowed from caving in. results in a situation where there annular flow fluid inner pipe rotating while outer stationary. The understanding dynamics such extremely important detailed investigations required. Though experimental investigation will reflect actual behavior but with advancement numerical techniques experimentation can be avoided application computational dynamics. Therefore, present study employs homogeneous model simulate single-phase predict loss variation eccentric vertical annuli as function varying parameters: velocity, rotation speed