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| 单词 | top drive system |
| 释义 | top drive system in the Oil and Gas Industry (tɒp draɪv sɪstəm) Word forms: (regular plural) top drive systems noun (Extractive engineering: Field development, Equipment) A top drive system is a system which includes a motor that turns the drill string, used instead of the kelly. The top drive system for rotating the drillpipe and bit is an alternative to the kelly, rotary table,and swivel. A top drive system turns the drillpipe directly, rather than using a rotary table and kelly. A top drive system is a system which includes a motor that turns the drill string, used instead of thekelly. |
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