1·This pressure must be under control, and we control it by means of the mud which we circulate down the drill pipe.
这种压力必须加以控制，我们让泥桨顺着钻杆向下循环，用这种方法来控制压力。
2·This pressure must be under control, and we control it by means of the mud which wecirculate down the drill pipe.
这种压力必须加以控制，我们让泥桨顺着钻杆向下循环，用这种方法来控制压力。 。
3·We must have this drill pipe shortened.
我们必须把这根钻杆截短。
4·We can provide various types of drill pipe joints as customer's demand. All mechanical properties are beyond API standard.
我公司可按用户的要求提供各种型号的钻杆接头。各项力学性能均完全超过API标准要求。
5·Drill pipe threads are not cleaned in that way.
钻杆丝扣不是那样清洗的。