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Blowout BOP (BLowout BOP is used on the top of drill string to give us control in the well incase we had gain or kick.  drillingmanual.com enghmf) | |||
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| Blowout BOP (BLowout BOP is used on the top of drill string to give us control in the well incase we had gain or kick. drillingmanual.com enghmf) | |||