دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

Injection of fluids down the annulus or “backside”. Common as a gas supply path for gas lift. Also used in some fracturing operations, to spot fluids downhole when no packer is used or a type of injection valve is in the tubing to allow entry of chemicals

chemical injection valve.

gas injection valve.

n: a poppet spring-loaded subsurface valve run in on wireline, landed in a profile, to shut the well in if injection ceases.

a downhole valve in an injection well designed to prevent backflow if the injection is stopped.

a short, full diameter passage tubing sub with a pocket reachable from the inside where gas lift valves or chemical injection valves can be placed by wireline.