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钻杆类似一个细长比很大的空心传动轴。它在钻进过程中,同时承受着拉、扭和压及其复合载荷的作用,监将一定压力的冲洗液输送到钻头的切削面。对于绳索取心钻
Drill pipe is similar to a slender hollow shaft. It is in the drilling process, while under tension, torsion and pressure and the role of composite load, monitoring a certain pressure of the rinse liquid delivered to the bit face. Coring for ropes