You can't pull the water from the well any faster than the screen will let it in. It's all under a vacuum. So if it's surging like that, I would guess the well is barely making water at all.
You could have driven the screen too far. How do you test for water as you are driving the well? You should be checking it every 5 feet with a pitcher pump if the water level is less than 25 feet which I would think it is with a 31' deep well.
What made you go with a deep well jet pump and ejector anyway?