速度对金刚石钻头碎岩过程响应的影响

超高转速钻进技术打破了现有临界规程参数的界限,通过高转速、低钻压、低扭矩的钻进方式,实现高效破岩,为解决深部硬岩地层难以高效钻进的问题提供了切实的解决方法。根据现有的金刚石钻头破岩过程响应机制分析了超高转速钻进技术在该地层的高效钻进响应,确定了各参数对金刚石钻头钻进过程的影响。根据金刚石钻头破岩响应推导的结果,构建了金刚石钻头在岩石破坏领域中速度与破岩机制的关联。结果表明,超高转速钻进技术提高破岩效率的原因与碎岩机制转变有关,临界速度可能是主导破岩机制转化的关键因素。

MAKING OF THE EQUIVALENT MATERIALS USED FOR STUDYING ROCK RIPPABILITY

Based on the characteristics of the ripping of rock, the simulated conditions that would be satisfied by the prototype ripping and the model ripping have been derived in this paper. In order to .nanufacture the satisfying equivalent materials for the model ripping, a new method has been set up, and the materials, which can simulate the prototype rock "Hawkesbury sandstone", have been made by using the methed.