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What is the difference between drill pipe and drill collar?
Date:2020-11-03      View(s):355      Tag:What is the difference between drill pipe and drill collar?
While drill pipe makes up the majority length of a drill stringdrill collars make up only a small amount. ... In contrast, to drill pipedrill collars are thick-walled and heavy, with very limited flexibility. Drill collars are used at the bottom of the drill string, just above the drill bit.
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