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快速、准确地对孔内岩心定向取出高质量的定向岩心 ,是研制定向取心器的关键。介绍一种随钻定向取心一回次作业的定向精度高、取心质量好、结构简单、操作简便的 SDQ— 91型定向取心器
It is the key to develop directional coring tool to quickly and accurately orient the core in the hole to get high-quality directional core. This paper introduces a kind of SDQ-91 directional coring device with high directional accuracy, good coring quality, simple structure and easy operation,