An integral part of a blowout preventer that serves as the closing element on an open hole, and whose ends do not fit around the drill pipe but seal against each other and shut off the space below completely is the __________.
• Function of different BOP (blowout preventer) rams – which ones cut pipe, which ones seal around pipe, and which ones seal an open hole • Difference between pipe rams, shear rams, and rams that close when no pipe is in the hole • How a complete seal is achieved when there is no drill string across the BOP
• Ask yourself: which ram is specifically designed to close and seal when there is NO pipe in the preventer, so the two sides meet each other? • Which option is used to cut the pipe, and which is used just to seal around pipe without cutting it? Eliminate those first. • Think about the word parts in each choice (for example, something that ‘shears’ versus something that seals an ‘open’ or ‘empty’ space).
• Identify which type of ram is designed to shear or cut the drill pipe – that choice cannot be correct here. • Identify which ram type is designed to seal tightly around pipe of a specific size – that one does not match the description of ends that seal against each other. • Confirm which ram is defined as closing on an open hole with no pipe present, making a solid seal across the bore.
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