智利矿难救援人员开钻救生井开始营救33名被困矿工。
Drilling began to rescue the 33 workers trapped in a collapsed mine in Chile.
救援人员称，作为备用他们将会重新开钻另一口竖井，以防第一口竖井出现问题。
Rescuers said they would resume drilling a separate shaft as a back-up plan in case of problems with the first one.
塔河油田水平井由于第二次开钻裸眼段长，技术套管采用双级固井技术。
The two-stage cementing technique was used for the protective casing of the horizonal well in Tahe oil field because of a long open-hole interval in secondary spudding.
建立了顶驱装置开钻时的模型，并集成了导轨连续柔性模块，做了初步的仿真和分析。
The model of top driving device when starting drilling was established and the continuous flexible module of slide-way was integrated and a tentative simulation and analysis were also made.
该井四开钻探过程中成功地采用欠平衡钻井技术钻穿寒武系凤阳山组，以防止该区古生界灰岩储层发生井漏及储层污染，从而保护油层。
Using under balance pressure drilling technique aims at preventing the mud loss and pollution of Palaeozoic limestone reservoir in this area and therefore protecting oil reservoir.
该井四开钻探过程中成功地采用欠平衡钻井技术钻穿寒武系凤阳山组，以防止该区古生界灰岩储层发生井漏及储层污染，从而保护油层。
Using under balance pressure drilling technique aims at preventing the mud loss and pollution of Palaeozoic limestone reservoir in this area and therefore protecting oil reservoir.
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