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Oil and Gas Well Drilling and Servicing eTool
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Kelly

KellyThe heavy square or hexagonal steel member suspended from the swivel through the rotary table. It is connected to the topmost joint of drill pipe to turn the drill stem as the rotary table turns.

                                Kelly


 
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Occupational Safety & Health Administration
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Washington, DC 20210		 Page last updated: 02/27/2009