Through drilling experiment in 156 adjustment Wells, the drilling behaviors, cutter wear, downhole jet flow field and drilling effect of drag bits and roller ones were comparatively analyzed.

通过156口调整井钻井试验，对比分析了刮刀钻头和牙轮钻头的钻进特性、牙齿磨损特性、井底流场特性及钻井效果。

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According to the characteristic of high speed face milling process, the model of stress field of high speed face milling cutter is established on the dependability analysis.

高速可转位面铣刀是一种高速铣刀，在高速锐削过程中，刀具内部应力场的分布直接影响到刀具的可靠性和铣削性能川。

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The utility model relates to a milling cutter for railway vehicle brake head, which belongs to the technical field of the milling cutter.

本实用新型涉及一种铁路车辆闸瓦托专用铣刀，属于铣刀技术领域。

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Yankee outfielder Brett Gardner, who has watched Rivera's cutter break from center field, felt the same.

WSJ: Yankee Legend Sees the End