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Ingegneria meccanica: Industria petrolifera
| English |
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| Noun phrase |
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| Countable |
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| The expandable, moulded elastomer and steel closing element used in the annular blowout preventer. |
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| Ode85 |
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| A variation of the Hydril annular preventer is the Regan Type K preventer used on conductor and surface casings. This type does not employ an operating piston and simply uses fluid pressure to compress a packing unit. |
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| Ode85 |
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| packing element |
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| Petroleum Engineering |
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| ram preventer |
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| front packer, upper seal |
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| elemento di tenuta principale |
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| 3 |
