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

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.
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