The idea that a laying worker can't fly is incorrect, they can fly as well as any other worker.
I have joined laying worker colonies to queenright colonies using an excluder and a sheet of newspaper with good success, but usually there is little noticeable benefit to the queenright colony. If a colony has reached the laying worker stage, usually it is best to just shake out the bees where the colony stands, scratch the drone cell cappings on any capped brood, and put the frames over a colony to be cleaned out. If the varroa/hive beetle situation is high, overnight in a freezer may be of benefit.