采用钻杆联接器直接连接钻杆，在钻进工作时不需要在主动钻杆上再装卸其它钻具。
It USES drill rod connector to directly connect the drill rods, so that during the drilling work, it dose not require fixing or dismantling any of the other drilling tools on the Kelly.
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.
用于连接转盘和方钻杆的适配器。
An adapter that serves to connect the rotary table to the kelly.
应用推荐