Study on spectrum-based fatigue life direct calculation for spots of deep-water semi-submerged drilling unit;

深水半潜式钻井平台节点疲劳寿命谱分析研究；

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The compressibility and the theory of Mohr-Coulomb Intensity limit equilibrium of soil, provides the basis for the self-rescue principle of rodless drilling unit.

土体的可压缩性和土的摩尔·库伦强度极限平衡理论为无钻杆钻具自救机理提供了理论依据。

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Drilling unit has the functions including rapid falling, slow work-feeding and quick feeding back to improve working efficiency.

钻孔单元具有空行程快进，慢速工进和快速回程功能，提高工作效率。

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Wolverine sold a working interest in their 100 square mile drilling unit incorporating Covenant to Oxy following the discovery.

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The rate was 0.97 for the Gulf drilling unit, over the target of 0.62, say minutes of an August 2009 meeting.

WSJ: As CEO Hayward Remade BP, Safety, Cost Drives Clashed

Bankston, nominated by the United States of America, for placing their own lives at risk while rescuing survivors from the Deepwater Horizon Mobile Offshore Drilling Unit, in the Gulf of Mexico, following a devastating explosion on the rig in April 2010.

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