这些风险又主要集中在钻、完井（ 包括修井） 两个主要环节上。
These risks centralize mainly in drilling and completion operation ( inclusion workover ).
应用该计算方法和控制技术对大庆油田待钻修井地层孔隙压力和孔隙流体渗流速度进行了计算。
The methods and techniques are used to calculate the pore pressure and filtration velocity of pore fluid from the formation that workover will be conducted in Daqing Oilfield.
为了提高新型微钻头的钻削性能，提出了一种适合于微钻头的横刃修磨原理及方法。
To raise drilling performance of new micro-drill, a novel method was advanced for reginding of chisel edge.
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