方钻杆之后带动整个钻柱进行旋转，由于方钻杆是与钻柱的顶部用丝扣连接在一起的。
The kelly then turns the entire drillstring because it is screwed into the top of the drillstring itself.
它是个上端为钻杆母扣或者由壬，下端为套管公扣，内空心的转换接头。
Its upper end is drill pipe box or union, the nether end is casing pin. It is a crossover with hollow inside.
钻杆丝扣不是那样清洗的。
这是钻杆丝扣油，不能用在钻铤丝扣上。
The pull rod is screwed into the inside thread of the anchor head.
昨天我们决定后天去机厂修理方钻杆旋扣器。
Yesterday we decided that we should go to machine shop to repair the kelly spinner the day after tomorrow.
如果钻杆丝扣生锈，必须清除掉。
If the drill pipe threads become rusty, rust will have to be cleaned.
这是钻杆丝扣油，不能用在钻铤丝扣上。
非开挖反向回拉扩孔施工过程中时常出现钻杆正转而发生退扣，造成钻具孔内脱落事故的反常现象。
The dropping buckle usually occurs when reverse pulling is used for expanding the bore in the trenchless construction, thus causing the fall-off of the drilling tools.
公锥与正、反扣钻杆及其他工具配合使用，可实现不同的打捞工艺。
The taper tap can effect different fishing operations when equipped with RH thread or LH thread drill pipes and other tools.
从钻井连续循环系统上卸扣卡瓦的工作机理入手，弄清了钻杆工作时的受力状态。
Based on the operational principle of on/off slip of continuous-circulation system, the forced state of drill pipe was clarified.
附设液压夹持器，并配以手动御扣装置，使拆御钻杆更方便。
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。
Equipped with hydraulic holder and hand powered unscrewer, to untighen the drill rod easily.
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