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annular blowout preventer |
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annular blowout preventer [′an·yə·lər ′blō‚au̇t pri‚ven·tər] (petroleum engineering) A sealing device used in a drilling operation that consists of a large valve, which provides a seal in the annular space between the pipe and the wellbore, or on the wellbore itself if no pipe is present. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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