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大位移水平井井眼净化旋转因素数值模拟 被引量:2

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摘要 应用CFD(计算流体力学)方法对钻井环空液固两相流动进行数值模拟,得到钻柱旋转情况下环空液固两相流流场流动特性:类螺旋运动是环空内液固两相主要运动方式,固相非对称分布在环空内;得到水平井段液、固相速度及体积分数分布;水平并段钻柱有旋转时环空高浓度(〉80%)固相环空占有面积率比钻柱无旋转时低近2/3;得到主要参数在钻柱旋转情况下对环空固相运移影响规律;钻柱转速在80-120r/min范围内时岩屑床高度变化较敏感;钻柱旋转对环空固液两相流动起扰动效应,可以很大程度上降低环空内固相含量,从而改善环空井眼净化效果。
出处 《西部探矿工程》 CAS 2010年第5期51-54,共4页 West-China Exploration Engineering
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