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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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DST (drill Stem test), a fast test for show of oil and gas while drilling.
即中途测试，是指油井在钻井过程中，对有。
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。
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.
WHITEHOUSE: Deepwater BP Oil Spill: Presidential Press Conference
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