(Free Energy): Would my crazy free energy machine work?

I was just in the bath, when I had something of an idea for a free energy machine, and I am wondering if it would work.

As you know, if you put a drinking straw in a glass of water, you will need to create suction on the straw in order to get the water in to your mouth.

Also, if you put a hose pipe in a bath tub and blow down it, you will create bubbles in the water. The deeper in to the water the hose pipe goes, the harder you will need to blow to create bubbles, as there will be more water pressure to displace.

This is where my idea comes in.

What if, you made a long pipe, that had inside of it an electrical generator that would spin to create electricity, rather like the ones that create electricity in damns by having water flow in the river, a kind of wheel.

Lets say, the generator is designed to spin when you put the equivalent of about 0.5 atmospheres of pressure on to the wheel.

You then make the pipe so long, that it can be placed in to deep water, until it reaches 2 atmospheres of pressure. One end in the water at 2 atmospheres of pressure, and the other out in the air, at 1 atmosphere of pressure.

Would the water not flow up the pipe, through the generator creating electricity, and up in to the air, falling back down in to the ocean?

Here is an Illustration of it.