How To Repair Ripped Off Solder Pad On PCB
One thing I have tried and works, but requires good precision is the following: 

Drill small hole near the ripped pad and insert a piece of copper. Twist the ends of the copper so that they form 2 loops on both ends of the board. Then solder it to the track and on top of that solder any component that was there. 

If the pcb has mask or paint, scrape them off. If it is a 4 board layer, the above technique is doable, but the piece of copper must be insulated so that it does not short-circuits the 2 mid layers.

Here are some pictures, in which we managed to fix the destroyed "via", but the technique is the same for destroyed pads.