Bell nipple

Bell nipple

A [http://www.glossary.oilfield.slb.com/Display.cfm?Term=bell%20nipple Bell nipple] is a section of large diameter pipe fitted to the top of the blowout preventers that the flow line attaches to via a side outlet, to allow the drilling fluid to flow back to the mud tanks.

See Drilling rig (petroleum) for a diagram.


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