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Kelly

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Petroleum Equipment

A kelly is a heavy hexagonal or square steel pipe used in oil drilling that is is suspended from the swivel through the rotary table.  Connected to the very top portion of the drill string or pipe, the kelly is designed to turn the drill string as the rotary table turns.[1]

[edit] References

  1. Oil and Gas Well Drilling and Servicing eTool. OHSA. United States Department of Labor. 29-05-2009.