CFD Analysis Of PDC Bit Heat Transfer By Drilling Mud Flow For Their Thermal Mortality

In this study numerical simulation of thermohydrodynamic characteristics of mud flow and mortality threshold of PDC bits are investigated using computational fluid dynamic technics. Governing equations of fluid flow were discretized by FVM and solved by SIMPLE algorithm. Well wall temperature increased linearly and block-off method is used to model complex geometry of drill pipe, drill collar, bit and its nozzle. Cooling of PDC bits in different heat generation values were investigated. Finally it is found that due to complexity of geometry, high Reynolds number will not necessarily enhance heat removal to help PDC bits to remain in safe region.

Keywords:

CFD , PDC bit , Forced convection heat transfer