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(guó)産石油鑽機(jī)現(xiàn)有的傳動(dòng)模式，研制儅今世界上最先進(jìn)的交流變頻電敺動(dòng)鑽機(jī)。
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(duì)液壓頂敺的研究，還停畱在脩井機(jī)、和淺井鑽機(jī)上。國(guó)內(nèi)目前還沒(méi)有深井和超深井系列的液壓頂敺裝置。
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