| 摘要 |
<p>A blowout preventer (10) having a body (38), a main bore (36) in the body, and rams (42, 44) that project into the main bore. The rams can be shear rams (42) for shearing a tubular in the main bore, pipe rams (44) for sealing around a tubular in the main bore, or sealing rams that seal across the main bore. The rams are in cavities (40, 43) formed in the body, the cavities are formed such that more than two rams can be disposed at the same elevation in the body thereby reducing the overall height of the blowout preventer stack.</p> |
