Downhole material retention apparatus

摘要

A debris removal apparatus for mounting in a tubular string downhole that supports a mill that generates the debris or another downhole tool, comprising: a housing connectable to a tubing string, the housing further comprising a first flow path to deliver fluid to a mill or another downhole tool 5 and a discrete second flowpath to retain debris from fluid returning and flowing therethrough; a diverter mounted to the housing to selectively obstruct an annular space around said housing so that returning fluid with debris will enter said second flow path; said diverter comprises at least two sleeves each having an array of extending shapes to define at least one passage; at least one of said arrays is selectively articulated to allow flow or restrict flow between their respective passages.