Which of the following is a type of blowout preventer?

• A. Annular Blowout Preventer
• B. Derrick
• C. Double Ram Blowout Preventer
• D. Mud Pump

Answer: (A)

Blowout preventers control wellbore pressure during drilling, and the way they seal matters. An annular blowout preventer uses an elastomer seal that can close around the drill string or around the wellbore itself, adapting to a range of pipe sizes and even sealing when there’s no pipe present. That flexibility and broad applicability make it the best example when identifying a type of BOP. A derrick is simply the framework above the well, not a BOP. A double ram blowout preventer is a specific ram-type BOP that uses metal rams to seal, which is a more specialized variation. A mud pump moves drilling mud for circulating the system, not a BOP.