1·The sales, maintenance and service of rotary drilling rig drill rod;
旋挖钻机钻杆的销售、维修、服务；
2·Drill rod and collar are key apparatus in drilling exploration and well drilling industry.
钻杆和钻铤等管状螺纹联接件是钻探和石油钻井工业中的关键设备。
3·Secondly there is error between the thread roll angles of thread rolling die and drill rod.
滚丝轮螺纹和钻杆螺纹的螺旋角有误差。
4·Equipped with hydraulic holder and hand powered unscrewer, to untighen the drill rod easily.
附设液压夹持器，并配以手动御扣装置，使拆御钻杆更方便。
5·Wear-resistant materials, a connecting flange and a drill rod by high carbon steel finishing.
材质耐磨，连接法兰和钻杆采用高碳钢精加工。
6·The pressure of the under well drill rod which even works in the caustic medium is extremely complex.
钻柱在井下的受力极度复杂，甚至工作在腐蚀性介质中。
7·The orientation plate, the axial line in the handle, and the middle axial line of the drill rod are on the same plane.
本实用新型所说的定向板与手柄中轴线、钻杆中轴线在同一平面。
8·Ever since 1998, corrosion of drill rod and minor corrosion leakage have occurred in Pinghu oil Field in East China Sea.
从1998年开始，东海平湖油气田在钻井中接连出现了钻杆腐蚀与刺漏现象。
9·There were a lot of difficulties when the traditional fatigue lifespan assessment method is used in evaluating drill rod lifespan.
传统的疲劳寿命评估方法用于钻杆评估存在诸多困难。
10·In this paper, a polar coordinate drill-rod lifter was developed to strictly control drill rod in order to precisely locate the rod.
作者研制了极坐标扶钎器可以严格的控制钎杆，从而保证孔位准确。