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| previous | drill collar - collezione «Ingegneria meccanica: Industria petrolifera» - Maria Cristina Basti | next |
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Ingegneria meccanica: Industria petrolifera
| English |
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| Noun phrase |
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| Countable |
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| DC |
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| Heavy-walled steel tubes placed at the bottom of the drill string to provide weight for the bit and hold the drill string in tension. |
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| Sh91 |
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| The pendulum effect of the drill collars at the bottom of the drill stem tends to make the bit drill a nearly vertical hole that has few sharp bends. |
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| Sh91 |
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| drill pipe |
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| Petroleum Engineering |
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| drill stem |
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| asta pesante |
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| 3 |
