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本文介绍一种新近发展的压力取心系统,其特点是钻速高,还有一种连续链式的钻头,它能在不把钻头起出井眼的情况下,把新的切削元件循环到工作位置。上述钻头及取心系统已进行了首批现场试验。
This article presents a newly developed pressure coring system characterized by a high drilling rate and a continuous chain of drill bits that can circulate new cutting elements to a working position without raising the drill bit out of the borehole . The first drill and coring system has been the first field test.