We need a short drill collar to put here.

这里要接一根短钻铤.

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MS brand drill collar are manufactured strictly from API Spec . 7 and SY 5144 standard.

牡石牌钻铤完全采用API规范及SY5144标准生产.

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In drilling exploration and well drilling Industry, the drilling pipe and drill collar are key apparatus.

钻杆和钻铤等管状螺纹连接件,是钻探和石油钻井工业中的关键设备.

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Using steel tube making by this process ensures the stability of the drill collar.

另外因采用该工艺生产的钢管用料,也保证了加工企业钻铤质量的稳定性.

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This heavy - duty type drill collar lifting sub is designed for use with the drill pipe elevators.

重型钻铤提升短节与钻杆吊卡一起用来上吊钻具.

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