The lateral imbalance force on a polycrystalline diamond compact(PDC) bit is one of the important causes to lead severe bit whirl, which is associated closely with cutting structure on a bit.

• 聚晶金刚石(PDC)钻头的侧向不平衡力是造成钻头涡动的主要原因之一,而侧向不平衡力取决于钻头的布齿结构,通过合理的布齿结构设计,可有效地控制侧向不平衡力的大小。