Ingegneria meccanica: Industria petrolifera
English |
power sub |
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Part of speech |
Noun phrase
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Grammatical label |
Countable
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Definition |
Portable, hydraulic powered, pipe rotating devices which are designed specifically to replace the kelly stem, the kelly bushing and the rotary table. They rotate inside the BOPs and a rubber protector is placed on their outside diameter to protect them from wear.
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Definition source |
Sh91
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Context |
The PS-60 Power Sub is best suited for light drilling and workover operations using macaroni drillpipe and tubing. It delivers smooth, shock free controlled torque and practically eliminates the danger of twist-offs or swelled boxes on these work strings. It is used to drill out cement or other obstructions in the pipe, for casing scraping operations; and with small drill pipe, it is suited for the drilling of ratholes and water wells.
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Context source |
CC88
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Subject field |
Petroleum Engineering
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Comprehensive concept |
drill stem
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it |
power-sub
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Reliability code |
3
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