Patent ID: 8474522
Filing Date: 2013-07-02
Classification: E21B

Abstract:
1. 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 top and a bottom end for connecting to the string, said ends structurally held together to support string weight from said lower end through an outermost exterior housing; a flow tube within said outermost exterior housing to conduct flow between said ends to the mill or other downhole tool, said flow tube defining an annular space with said outermost exterior housing; at least one diverter extending from said outermost exterior housing to divert flow and cuttings returning from the mill or tool from going past said outermost exterior housing on the outside of said outermost exterior housing and to direct flow into said annular space for retention of debris from flow that then exits said annular space; said diverter is selectively movable between a retracted and an extended position.