Home > Term: kelly bar
A hollow bar attached to the top of the drill column in rotary drilling; also called grief joint; kelly joint; kelly stem.
- Μέρος του λόγου: noun
- Κλάδος/Τομέας: Mining
- Category: General mining; Mineral mining
- Government Agency: USBM
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Δημιουργός
- ed.young
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(V.I.P) 21084 points - 100% positive feedback
(Milwaukee, United States)
