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在鑽粒鑽进中,地层構造及鑽进技术对鑽孔弯曲的影响是很大的。为了滿足地質设計要求,在鑽进过程中必須根据不同的地层情况,采取相应地技术措施,才能保証鑽探質量。我队518机所鑽进的黑云母石英納長片岩易使鑽孔发生弯曲,大部分鑽孔每100公尺都要弯曲10°以上。但他們根据所鑽进地层中,大顆粒石英較硬,小顆粒(用肉眼看不见的)石英较軟,且上盤多是鉄矿和硬岩石,岩层傾角較大等地質情况,分析了在此軟硬相间岩层鑽进时,
Drilling in drilling, strata structure and drilling technology on the impact of drilling is great. In order to meet the geological design requirements, it is necessary to take corresponding technical measures according to different formation conditions during the drilling process so as to ensure the drilling quality. The drilling of biotite quartz-bearing schist in our team 518 machine tends to bend the borehole, with most of the boreholes bent more than 10 ° every 100 meters. However, according to the strata to be drilled, large-grained quartz is relatively hard, small-sized (invisible to the naked eye) quartz is softer, and the hanging wall is mostly ores and hard rocks. This soft and hard rock between the drilling,