| 摘要 |
A method for the improvement of performances involves a drilling model wherein the model takes account of the effects of the destruction of a rock (2) by a cutter (1) fastened to a bit body (3) driven in rotation and the effects of the removal of rock cuttings by a fluid, by calculating a material balance from the production of cuttings by the cutter that has penetrated the rock by a depth delta , a bed of cutting of thickness l, a fluid strip of thickness h between the bed of cuttings and body (3), the fluid strip having a cuttings concentration c.
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