在钻头和下部钻具之间的刚性连接使得井下振动加剧。在钻头结构中设计一种可倾斜的挠性结构,可减少钻头与下部钻具的耦合程度。因而改进了钻头的稳定性。这种钻头的原理已在可模拟井底振动条件的专门设计的试验钻机上得到证实。一种8 1/2in(216mm)的原型钻头已在油田进行工业试验。井下加速度记录证明,装有挠性连接的钻头井下振动水平大幅度下降。 The rigid connection between the drill bit and the lower drill increases vibrations downhole. Designing a tiltable, flexible structure in the bit structure reduces the amount of coupling between the bit and the lower tool. Thus improving the stability of the bit. The principle of this bit has been verified on specially designed test rigs that simulate bottom hole vibration conditions. A prototype 8 1/2 in. (216 mm) drill bit has been field tested in the field. Downhole acceleration records show that downhole vibration levels with flexible connections drop significantly.