Double Flapper check valve

Dual back pressure valve is a submersible tool that is used for downhole operations and transmits fluid in one direction only - downwards.

As a rule, it run in hole at each job, since it is necessary to prevent the downhole fluid from entering the coiled tubing through the bottom of the assembly.

The wellbore fluid may contain mechanical impurities, as well as corrosive substances such as hydrogen sulphide or carbon dioxide.
Therefore, it is undesirable for the wellbore fluid to enter the downhole tool and coiled tubing.

The barrier for unwanted downhole fluid penetration into the coil tubing is this tool.

Dual back pressure valve flows only from the coiled tubing into the annular space and has two replicating reliable cartridges with flapper valves.