刮刀钻头钻进中几个问题的讨论
DISCUSSION TO SOME PROBLEMS ABOUT DRILLING WITH DRAG BIT
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摘要: 分析了刮刀钻头钻进时刀刃和钻具的受力情况;讨论了“蹩钻”的原因和控制办法。Abstract: The forces which the knives of a drag bit and drilling pipes suffer when drilling are analysed.The mechanism and the control of“suppression of drilling”are discussed.