drill pipe

drill pipe

noun
(in oil-well drilling or the like) any of several coupled tubes for rotating the bit and supplying drilling mud.
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World English Dictionary
drill string or drill pipe
 
n
(in the oil industry) a pipe made of lengths of steel tubing that is attached to the drilling tool and rotates during drilling to form a bore
 
drill pipe or drill pipe
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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