A rate of penetration (ROP) prediction equation for an insert roller cone bit is determined from laboratory drilling tests as. a function of bit weight, well depth and laboratory measured rock properties. A complete description of each of the seven rock types used in the study is presented. A comparison of ROP at different flow rates for each rock shows minimal hydraulic cleaning problems at the base hydraulic energy levels chosen. The predictive equation will be valuable in predicting drilling rate and understanding how the rock properties affect it.
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Walker et al. (1986) studied this question.
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