This paper mainly discussed the designation and operation of directional sidetracking and well track control.
重点介绍了该井定向侧钻及井眼轨迹控制的设计与施工情况。
This paper analyzes the difficult points in drilling operation, such as the difficult profile design and well track control and the high demand for wellbore cleaning.
分析了钻井施工难点：鱼骨剖面设计和井眼轨迹控制难度大，井眼净化要求高。
They said at one point the control tower told the pilots the plane was on track when in fact it was well off course.
他们表示，当飞机已经脱离轨道时，控制塔告诉飞行员飞机就在轨道上运行。
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