... 复合偶极子 combined dipole 组合钻头 combined drill 合成效率，总效率 combined efficiency ...
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对复合钻头的几何设计和性能设计提供了丰富的、有用的信息，同时叙述了组合钻头的破岩原理。
They supply plentiful useful information for the design and function of the integral PDC drill bit, while stating the principle of destroying the rock of the integral PDC drill bit.
通过大量的现场试验，得出三牙轮钻头三喷嘴优化组合的经验比值。
The experiential ratio of optimum combination of three nozzles on tri cone bit is obtained based on many field experiments.
应用数值计算方法，分析了偏心钻头底部钻具组合的受力和变形特性。
The mechanical properties and the deformation characteristics of the BHA with the eccentric bit are analyzed.
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