Computational Fluid Dynamic application on Bit Hydraulic Performance

Hydraulics can significantly affect bit performance in applications where cuttings volume, formation types,and rig pressure limitations lead to poor fluid dynamics that compromise cleaning and cooling, and resultin down-hole bit balling that negatively affects penetration rates and higher bit wear. A key mitigationchallenge is improving cleaning efficiency without experiencing a significant pressure drop across the bit.To improve the hydraulics, the fluid flow pattern across the drill bit should be optimized for low pressuredrop, low recirculation flow and high velocity. This research including computational fluid dynamics(CFD) simulations which were done in some articles and then reviewing their validation by some relatedexperimental tests for better understand flow and velocity across the bit.

Keywords:

CFD , Computational Fluid Dynamic , Bit , Hydraulic