John,
I was just thinking, if the obstruction is mud or simular material, you may be able to run PVC tubing open ended and drive it into the obstruction with just hand motion, once unable to gain additional footage, pull the tubing out, clean out the obstruction and continue again.

Im not sure of your area or sources around the well but you may also be able to get you a water hose connection for the PVC,connect it to the PVC, turn on the water and flush it out of the end of the PVC. Then you can run it into the well and as your reach the obstruction, you may be able to wash down through the obstruction working your PVC up and down slowely.

Just a thought.

Coupe

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