Which of the following is a ram-type blowout preventer?

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

Answer: (C)

A ram-type blowout preventer uses moving steel rams to mechanically seal off the wellbore. The double Ram Blowout Preventer fits this category because it contains two ram elements in its stack that close in to isolate the well and can also accommodate sealing around pipe or shearing the drill pipe if needed. In contrast, an annular blowout preventer seals around the pipe with a rubber element and is not a ram-type device. The derrick is the structure that supports the drill string, and a mud pump circulates drilling fluid—neither is a BOP.