Patent ID: 8307902

Claim:
A downhole flow control tool comprising: a main body having an internal bore for the passage of fluid therethrough; at least one first fluid flow port extending through a wall of the main body for the selective flow of fluid from the body internal bore to an exterior of the tool, the at least one first fluid flow port comprising an outlet having a first fluid flow area; at least one second fluid flow port extending through the main body wall for the selective flow of fluid from the body internal bore to the tool exterior, the at least one second fluid flow port comprising an outlet having a second fluid flow area greater than said first fluid flow area; and a flow control member mounted for movement relative to the body main bore between: a closed position in which both the at least one first and the at least one second fluid flow ports are closed, to thereby prevent flow of fluid from the body main bore to the tool exterior through said ports; a first open position in which fluid flow from the body main bore to the tool exterior through one of the at least one first and the at least one second fluid flow ports is permitted; and a second open position in which fluid flow from the body main bore to the tool exterior through the other one of the at least one first and the at least one second fluid flow ports is permitted.