... dioxyanthraquinone 二羟蒽醌 dip angle of hole 钻孔倾角 dip entry 倾斜苍坑道 ...
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Due to complicated geology and high dip Angle, hole deviation is easy to take place in Qingxi area of Yu-men oilfield, it is the bottle-neck for improving penetration rate for a long period.
玉门油田青西区块地质情况复杂、地层倾角大、容易发生井斜，长期以来一直是提高钻井速度的一个瓶颈。
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