Taking the well Hong 9 1 in Dagang Oil Field for example, the important role of the rotation of drilling string in removing cuttings bed in extended reach well is expounded.
并以国内大港油田大位移井红9—1为例，说明了钻柱旋转在大位移井中对清除岩屑床的重要作用。
According to the theory and practical analysis of the cuttings bed removing methods, a kind of cuttings bed removing tool has been developed.
根据对岩屑床清除与井眼清洗的理论与工程实践方法的分析，论文提出了一种岩屑床清除工具。
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