We have a large amount of sediment in our well. The tank will not take on water. Can the tank be removed and flushed to remove sediment?

I assume the tank is in your house... like everyone I've seen. They should have a drain and should be drained yearly.

But I am thinking your problem is elsewhere in the system.

You can remove the tank and flush it, but if it's that full of sediment, then you have a real problem. Likely a problem in the well itself. The well should have a screen liner that prevents sediment from entering. How old is the well?

BTW, how do you know the tank is not taking on water? Do you still have pressure?