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(yīng)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(qū)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(qū)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(qū)裝置。
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