MULTIPLE PORT CROSSOVER TOOL WITH PORT SELECTION FEATURE

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 for slurry flow to continue. Outlets are selected by a series of balls that get larger and land on progressively higher and larger seats on sleeves. As a sleeve shifts to cover a spent outlet it moves away from a new outlet for continuation of slurry flow to the outlet opened by virtue of the shifting sleeve.