Multiple port crossover tool with port selection feature
作者： Richard Y. Xu
DOI:
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摘要: A crossover for gravel packing has multiple outlets that are selectively covered as they wear from erosion with the covering of an outlet exposing another slurry flow to continue. Outlets selected by a series balls get larger and land on progressively higher seats sleeves. As sleeve shifts cover spent it moves away new continuation opened virtue shifting sleeve.
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