• 普通普通轧机后,直接变成实心空心麻花钻杆

    Common round steel or steel tube may be rolled into solid or hollow twist drill rods by using the said rolling mill.

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  • 本文选用S135钻杆作为研究对象,进行钻杆钢腐蚀腐蚀疲劳行为研究。

    The S135 drill pipe steel was selected as the research object in the paper; the oxygen corrosion and corrosion fatigue be.

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  • 试验表明,采用合适冶炼工艺大型转炉炉外精炼能够批量生产超低硫低磷钻杆使钻杆获得高横向冲击韧性。

    Test results show that such steel can be mass produced with technology of a large converter plus the secondary refining, which can insure drill pipes for the transverse impact toughness.

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  • 为了满足塔里木油田韧性钻杆需求试制超低钻杆

    In order to meet the Tarim Oil Field 's demand for high toughness drill pipes, Baosteel has trial-produced ultra-low sulfur and phosphorus steel for drill pipes.

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  • 为了满足塔里木油田韧性钻杆需求试制超低钻杆

    In order to meet the Tarim Oil Field 's demand for high toughness drill pipes, Baosteel has trial-produced ultra-low sulfur and phosphorus steel for drill pipes.

    youdao

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