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drill string , drill rod
Pick up drill stem test tool.
提起钻柱测试工具。
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The longer the single drill pipe, the lesser the critical compressive force of drill stem.
钻杆的单根长度越长，钻柱所能承受的临界载荷越小。
Drill stem tests are taken from some Wells almost immediately after drilling and completion operations.
有些井刚钻完并进行完井作业后，就立即采取钻杆测试。
So, for example, when they said they would drill one relief well to stem this leak we demanded a backup and ordered them to drill two.
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