... and materials strength criterion drilling fluid selection and formulation Wellbore Design water activity 0 drilling fluid chemistry drilling fluid property Upstream Oil & Gas pore pressure moisture content anisotropy factor failure criterion water activity shale Chenevert wellbore integrity...

... in order to prevent the loss of the drilling fluid. Understanding the behavior of the yield stress fluid as it enters a natural rough-walled fracture is crucial for designing the additives used to stop the fluid loss. drilling fluid property Upstream Oil & Gas lubrication theory approximation...