Y- Tool

The Y-tool was designed to allow access to the reservoir with an ESP in the well by including a by-pass tube and hanging the ESP off to the side of the main tubing string. With a Y-tool perforations can be added, logs can be run – it is even possible to run a spinner survey with the ESP in operation.

The standard Y-Tool involves the use of plugs to prevent recirculation while the ESP is in operation, but
there is also an auto Y-tool which uses a flapper to control the flow path automatically.

Auto Flow Sub or Auto Diverter Valve

The Auto Flow Sub or Auto Diverter Valve is a device
that will close when the ESP is in operation and open
when the ESP is shut down. These are excellent devices
when operating an ESP in gas and/or sand.