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Blowout Preventer |
 One
or more valves installed at the wellhead to prevent the escape of pressure
either in the annular space between the casing and the drill pipe or in
open hole (for example, hole with no drill pipe) during drilling or
completion operations. See annular
blowout preventer and
ram blowout preventer.*
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*This is an abridged version of the Dictionary of Petroleum Terms
used with permission from PETEX®, The University of Texas, at Austin. All rights reserved
© PETEX 2001.
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