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•The paper suggests a practical method for evaluating the performance of rotary tri-cone bits based on large scale Measurement While Drilling (MWD) data in an open pit mine.•Production degradation profile of 52 bits has been carefully considered for evaluating this method.•While using this method, the relation between production degradation coefficient and life length of the bit has been established...
Percussion bits, polycrystalline diamond compact (PDC) bits and roller cone bits are widely used in well drilling. The evaluation methods for downhole conditions, such as the wear condition of drill bits and the in situ rock strength, are important issues in improving the drilling efficiency and reducing the drilling cost. In this study, drilling tests were conducted in laboratory using the three...
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