更换钻扣 Diamond buckle
复古钻扣 vintage diamond buckle
钻扣针织衫 diamond button sweater
星星钻扣尖头鞋 pointed toe shoes with star diamond buckle
闪光平底钻扣单鞋 glitter flat diamond buckle shoes
方钻扣平底夹脚凉鞋 square diamond buckle flat flip sandals
星星钻扣尖头平底鞋 star diamond buckle pointed toe flat shoes
钻杆旋扣器 Pipe spinner
钻头的丝扣部分 bit shank
正扣钻柱 right-hand string
在石油天然气钻井施工过程中，常常造成钻具接头磨损、偏磨及丝扣粘连，这是引起钻具损坏进而演化为井下事故的主要原因之一。
In the construction process of oil and gas drilling, the joint drill wear, eccentric wear and threaded partial adhesion caused drilling damage and then evolved into the major mine accidents.
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.
由于卸扣会使钻具产生弯曲力，因此，钻具接头必须尽可能低些坐在卡瓦上。
Since a bending force is exerted on the pipe during break out, the tool joint connection must be set in the slips as low as possible.
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