Saudi Arabian Oil Company

Qiuguo Li

Tariq Mahmood

Khaqan Khan

Augustine Ikenna Monyei

Systems and methods for predicting drill bit wearing state using drilling parameters and formation properties are disclosed. The methods include, for each of a plurality of past bit runs, obtaining a measured rock property value and a measured drilling variable value for the past bit run, and obtaining a measured dull grade for a drill bit used for the past bit run. The methods also include determining parameters of a functional relationship between the measured dull grade, the bit run time, the measured rock property value, and the measured drilling variable value, and predicting a predicted dull grade for a future bit run using a new drill bit. The methods further include replacing the new drill bit with a replacement drill bit at a time based, at least in part, on the predicted dull grade.

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Dhahran, Saudi Arabia

Qiuguo Li