Patent ID: 9512703
Filing Date: 2016-12-06
CPC Classification: E21B

Claim Text:
1. A downhole fluid flow control method for sequentially treating multiple zones, the method comprising: isolating first and second zones in a wellbore, each zone having a fluid flow control device positioned therein; establishing communication between the second zone and the fluid flow control device in the first zone; establishing communication between the first zone and the fluid flow control device in the second zone; injecting a treatment fluid from a tubing string through the fluid flow control device of the first zone while the fluid flow control devices of the second zone is in the closed position; generating a differential pressure between the first zone and the second zone; responsive to the differential pressure, dynamically opening the fluid flow control device in the second zone and dynamically closing the fluid flow control device in the first zone; and injecting the treatment fluid from the tubing string through the fluid flow control device of the second zone while the fluid flow control devices of the first zone is in the closed position.