为了起出钻具，钻井工人要把钻具分解成长度较短的单根或立柱。

To pull the string, the crew has to unscrew it, or break it out, into smaller lengths, or stands.

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串接钻具时，要按照设计逐根检查，以便确认每个单根的重量、钢级和下井顺序正确无误。

When picking up drill pipe, visually check each joint of pipe picked up to be sure it is in proper sequence according to weight, grade and class as designed.

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