The people pay attention on raising the span of the usage of the thread of drill collars and preventing the accident of drill string thread failure.
预防钻柱螺纹失效事故发生和提高螺纹连接使用寿命的技术长期以来倍受关注。
参考来源 - 钻铤螺纹失效分析及改进方法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
以上来源于: WordNet
N (in the oil industry) a pipe made of lengths of steel tubing that is attached to the drilling tool and rotates during drilling to form a bore 钻柱
The driller sets the drill string in the slips or elevator.
司钻把钻具坐在卡瓦或吊卡上。
Saltwater mud is known to have a very strong corroding effect on drill string.
人们知道，盐水泥浆对钻具有很强的腐蚀作用。
The riser's inner hollow core (a pipe within a pipe) is reserved for the drill string.
立管内部核心是空心的(管中管)，留给钻柱使用。
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