煤矿井下近水平定向钻进黏滑振动产生机理及应对措施
Mechanism and solutions of stick-slip vibration of near-horizontal directional drilling in underground coal mine
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摘要: 黏滑振动普遍存在于钻探施工过程中,煤矿井下近水平定向钻进也不例外,并且随着钻孔深度的延伸,黏滑振动现象加剧。黏滑振动的危害包括加速钻具损耗和降低钻进效率。为了抑制黏滑振动,分析了近水平定向钻孔孔底单弯螺杆马达定向钻进黏滑振动产生的机理,以及与竖直钻孔孔口动力回转钻进工艺产生黏滑振动的异同,研究了抑制黏滑振动的方法和原理,并进行了工程实践。Abstract: Stick-slip vibration generally exists in the process of drilling and construction, and near-horizontal directional drilling in underground coal mines is no exception. With the extension of the drilling depth, the phenomenon of stick-slip vibration intensifies. The hazards of stick-slip vibration include accelerated drilling tool wear and reduced drilling efficiency. In order to suppress the stick-slip vibration, the mechanism of the stick-slip vibration generated by the single-bent screw motor directional drilling at the bottom of the near-horizontal directional drilling hole is analyzed, and the similarities and differences between the stick-slip vibration generated by the dynamic rotary drilling process of the vertical drilling hole are analyzed. The methods and principles of suppressing stick-slip vibration have been studied, and engineering practice has been carried out.
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