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| previous | upper kelly cock - 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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| A safety valve that is run on a drillstring just above the kelly. It is screwed onto the uppermost connection to close off the inside of the drillstring in the event of a kick. It is used to stop fluids from flowing up the drillstring. |
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| Sh91 |
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| The Griffith Drillpipe Safety Valve can be used as a drillpipe safety valve or upper kelly valve to control blowout pressures, or as a lower kelly valve to prevent loss of drilling fluid when the kelly is disconnected. |
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| CC88 |
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| Petroleum Engineering |
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| surface blowout preventer system |
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| rubinetto superiore asta motrice |
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