rock roller bit 牙轮钻头
three roller bit 三牙轮钻头
roller-bit hole rig 牙轮钻机
Reed roller bit 瑞德牙轮钻头
six-roller bit 六牙轮钻头
three-roller bit 三牙轮钻头
a roller bit 牙轮钻头
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The failure analysis of the high speed roller bit bearing.
高速牙轮钻头轴承的失效分析。
In this paper, on the basis of the results obtained from the bench and field tests of the three roller bit, its improving direction is approached.
本文以三牙轮钻头的台架试验和油气田现场试验的效果为依据，探讨三牙轮钻头的改进方向。
A modern design method, by which computer aided optimum design is used through the whole process of roller bit design, is introduced in this article.
介绍一种牙轮钻头的现代设计方法。设计过程全部使用计算机辅助设计和优化设计。
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