煤层定向长钻孔施工钻具组合的优化配置

Optimal Allocation of Bottom Hole Assembly Using in the Construction of Coal Seam Directional Long Drilling

根据影响钻孔轨迹的因素分析以及对钻孔轨迹的预测,结合试验区的煤层赋存特点,设计了几种稳斜钻具组合型式并进行了试验。结果表明,试验中所选用稳定器的近钻头、满眼钻具组合,具有良好的保直作用和一定的纠偏能力,比较适合定向钻进的钻孔。应用不同的保直稳定组合钻具,有助于实现控制钻孔的轨迹。

According to the factors analysis of influencing drilling track and the prediction of drilling track, combining the coal seam oc- currence features of experimental area, several kinds of angle holding assembly models are designed and tested. The results show that the near - bit of stabilizer and packed hole assembly selected in the test have good straight - keeping function and a certain correcting capacity, which is more suitable for directional drilling. Using different straight - keeping stable compound drilling tools are contribute to control the drilling track.