Patent ID: 8157017

Claim:
A production tubing assembly, comprising: an upper flow path, a first flow zone and a second flow zone; a first valve sleeve having an open position and a closed position, the first valve sleeve allowing fluid communication between the first flow zone and the upper flow path when the first valve sleeve is in the open position, the first valve sleeve preventing fluid communication between the first flow zone and the upper flow path when the first valve sleeve is in the closed position; a second valve sleeve having an open position and a closed position, the second valve sleeve configured to allow fluid communication between the second flow zone and the upper flow path when the second valve sleeve is in the open position, the second valve sleeve configured to prevent fluid communication between the second flow zone and the upper flow path when the second valve sleeve is in the closed position; and a chemical injection system configured to inject an injection fluid from an injection fluid supply at a surface location comprising: a first fluid injection line configured to inject the injection fluid into the first flow zone and a second fluid injection line configured to inject the injection fluid into the second flow zone; a main fluid supply line configured to fluidly connect both the first fluid injection line and the second fluid injection line to the injection fluid supply; a first injection valve configured to allow injection fluid to flow through the first fluid injection line to the first flow zone when the first valve sleeve is in the open position, the first injection valve configured to stop injection fluid flow to the first flow zone when the first sleeve is in the closed position; and a second injection valve configured to allow injection fluid to flow through the second fluid injection line to the second flow zone when the second valve sleeve is in the open position, the second injection valve configured to stop injection fluid flow to the second flow zone when the second sleeve is in the closed position.