新型加长防斜减振PDC钻头的设计试验研究

PDC钻头在石油钻井和地质钻探中，在中等硬度和部分硬地层中钻进时，取得了很好的钻进效果，得到了满意的技术经济指标，生产单位也比较欢迎。但是，在复杂地层，如深孔软硬互层、裂隙互层和研磨性地层中钻进时，机械钻速变慢，钻头进尺降低，成了推广使用的“拦路虎”。俄罗斯钻探工作者针对上述地层钻探中存在的问题，设计出了加长型防斜减振钻头，经过实验室和野外试验证明，这种钻头是有效的，取得了很好的技术经济效果。

Design and experiment on a new elongated, stabilized andvibration-reduced PDC drill bit

In petroleum and geological exploration drilling, PDC bits have obtained good drilling results in middle hard and some hard rocks, resulting in satisfactory technical and economic indexes, and been accepted by drilling users. However, while they are used in complicated formations, such as drilling in hardness-changing formation, fractured formation and abrasive formation, the penetration rate is often slow with short bit life. In order to tackle above-mentioned problems, Russian specialists have designed a new elongated, stabilized and vibration-reduced PDC drill bit. Laboratory and field experimental results with the bit show that the bit is effective in the field with good technical and economic results.