A large valve, usually installed above the...

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Question 1 of 2066636ee728f7522a1c517ef3

A large valve, usually installed above the ram preventers, that forms a seal in the annular space between the pipe and wellbore or, if no pipe is present, on the wellbore itself is called the __________.

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Question 1 of 20

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🔍 Key Concepts

• Blowout preventer (BOP) stack and where different preventers are located (ram vs. annular) • The function of a device that can seal around a pipe and also on open hole when no pipe is in the well • Difference between a component name (the valve itself) and the space between pipe and casing (annular space)

💭 Think About

• Which option describes a valve that can close around different sizes/shapes of pipe and also close completely when there is no pipe? • Look at each choice: which are parts of the BOP control system, which are flow-control devices, and which refer to a geometric space rather than a mechanical valve? • In a BOP stack, what type of preventer is normally installed above the ram preventers to provide a flexible sealing element?

✅ Before You Answer

• Confirm which choice specifically refers to a valve in the BOP stack that can seal both around pipe and on open hole. • Eliminate any answer that is just the name of the space between pipe and wellbore, not a mechanical device. • Eliminate any answer that is primarily part of the hydraulic power/control system rather than the actual well-closing valve.

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