| 摘要 |
<p>A method of determining characteristics of a rotary drag-type drill bit comprises the steps of determining the shape and location of a datum profile (26, 43) and a reference profile (27, 44) located inwardly ofthe datum profile (26, 43), and ascertaining a volume of cutting structure material located between the datum and reference profiles (26, 27, 43, 44). <IMAGE></p> |
