Patent ID: 8256522

Claim:
A flow control screen having a fluid flow path between a perforated section of a base pipe and a filter medium positioned around a blank pipe section of the base pipe, the flow control screen comprising: at least one valve assembly disposed within the fluid flow path, the at least one valve assembly including a piston body and a valve plug, the piston body having an internal seat and a collet assembly that is radially outwardly constrained in a first operating position of the piston body to retain the valve plug therein and radially outwardly unconstrained in a second operating position of the piston body, wherein an internal differential pressure seats the valve plug on the internal seat to prevent reverse flow; wherein a predetermined internal differential pressure on the valve plug causes the piston body to shift from the first operating position to the second operating position while continuing to prevent reverse flow; and wherein an external differential pressure causes the valve plug to be expelled through the collet assembly when the piston body is in the second operating position, thereby no longer preventing reverse flow.