I see a galvanized tee on top of the well seal (the red rusty thing). The well seal has four bolts with 9/16 inch heads. Loosen all four about two turns. No more. * Do not take them all the way out.*Cut the PVC pipe then start pulling on the tee. It could be PVC pipe under the tee, it's hard to tell, but with galvanized pipe it's going to be heavier. The well seal will come up usually when you get to a joint. Just juke the pipe up and down bumping the bottom of the well seal until it pops out. It has a thich rubber seal sandwiched between four pieces of metal, two up and two under. It's advisable to have something to slip under the coupling of each joint while you unscrew the pipes and take a rest. A plate with a slot cut in it just the width of the pipe works good. Cut the slot to the center of the plate and have the plate large enough to sit over the casing. The rest is just all muscle.
bob...