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美国曾经使用一种柔性钻杆钻进系统来打顶板锚杆孔。由本迪克斯国际公司制造的这种钻机主要用于在场所受限制的情况下进行钻进。通常,在进行钻进操作时,钻架的总长度在很大程度上决定于钻杆长度。如用些短钻杆,由于能量消耗在接箍上,结果钻进效率就降低。柔性钻杆系统的本质就是钻杆通过钻机马达来带动。在工作面这一侧,钻杆在扭矩作用下,钻杆组象任何通常的刚性钻杆一样运转,而在给进的一侧,钻杆组没有负荷,这样钻杆就成了柔性的而且能弯曲成半径为0.3米的园弧。
The United States used to hit a roof bolt hole with a flexible drill pipe drilling system. The rig, manufactured by Bendix International, is used primarily for drilling in restricted locations. In general, the overall length of the drill rig is largely determined by the length of the drill pipe during the drilling operation. With some short drill rods, drilling efficiency is reduced due to energy consumption on the coupling. The essence of a flexible drill pipe system is that the drill pipe is driven by a drill motor. On the side of the working face, the drill pipe under torque acts like any normal rigid drill pipe, and on the feed side there is no load on the drill pipe group, so that the drill pipe becomes flexible and Can bend into a radius of 0.3 meters Park arc.