英语词汇“drill string”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	drill string
释义	drill string noun A structure consisting of coupled lengths of pipe or casing, which occupies the hole made in drilling for oil or gas.Vibration of the drill string may also reduce the friction between the drill string and the hole, resulting in lower torque requirements.... Mud is injected into the drill string, up a borehole and through the blowout preventor adjacent the sea floor. You keep adding to the drill string until you reach the total depth of the well.
随便看	you can't keep a good man (or woman) down you can't lose you can't make a silk purse out of a sow's ear you can't make bricks without straw you can't (or can) talk (you shouldn't or should talk) you can't put an old head on young shoulders you can't teach an old dog new tricks you can't win them all (or win some, lose some) you could have fooled me! you could have knocked me (or her, him, etc.) down with a feather you couldn't make it up you'd you don't say (or you don't say so)! Youghiogheny River you have no idea you haven't lived! youing you know you know something (or what)? you-know-who (or you-know-what) you'll you may (or might) as well be hanged for a sheep as for a lamb you must be (or have to be) joking you must be (or have to be) kidding you name it

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