Originally U.S. A device inserted into an annular space in an oil well (such as that between the casing and the tubing) in order to block the flow…
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| 单词 | θ213368 |
| 释义 | society > occupation and work > equipment > oil and natural gas recovery equipment > [noun] > blocking device (2) packer1870 Originally U.S. A device inserted into an annular space in an oil well (such as that between the casing and the tubing) in order to block the flow… storm choke1966 a safety valve installed in an oil-well pipe below the ocean surface, designed to stop the oil flow should it exceed a predetermined rate as a result… |
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