drive-in rig

基本解釋

It is necessary to develop thealtemating-current variable-frequency electric drive drilling rig which is regarded as the most advanced rig in the world.
應擺脫國產(chǎn)石油鉆機現(xiàn)有的傳動模式，研制當今世界上最先進的交流變頻電驅動鉆機。
However, the study in the hydraulic top drive only used in the service machine, poor-boy rig, also there have no research on deep and ultra-deep series of hydraulic top drive unit in china.
然而，對液壓頂驅的研究，還停留在修井機、和淺井鉆機上。國內(nèi)目前還沒有深井和超深井系列的液壓頂驅裝置。
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