A Heat Transfer Model for Accurate Wellbore Temperature Prediction during Drilling

Accurate prediction of wellbore temperature is essential to avoid potential drilling fluid/drillstring overheating and wellbore stability problems. A new model is proposed to predict the dynamic wellbore temperature during drilling. Besides the effect of fluid flow on the thermal transfer, the model also incorporates effects caused by the forces created from the contacts between drillpipe and casing/formation. The new model is utilized in a practical well to study the dynamic temperature changes. The model can be used to accurate prediction temperature profiles in the wellbore at the design stage or mud and downhole tools selection during drilling operation.