Have A 50 ft. 2 INCH WELL WITH A 4 FT. SCREEN ON A 3 FT TAIL PIECE.

Have the taper tool screwed into the tail piece with a slam tool above the taper threaded tool. Have pulled many of these by hand.
This one will not come up. My working pipe on the taper tool is only 1 inch. Not sure how much hydraulic force via jacks to use on this. Using the slam tool above the taper screw thread has always done the job.
Any ideas out there would be appreciated.
len in central Michigan