I have a finished basement where the concrete floor is covered with an
underpad and carpet, no subfloor. When the carpet was laid several years
ago, the only floor drain was covered. (Sewer gases haven't been a problem
because the trap is topped up by the air conditioner/high efficiency furnace
drain.)

I'm thinking of replacing my water heater and that floor drain would come in
handy to drain the tank. Having a functional drain would be a good idea in
general. The problem is: the drain is in a very high traffic area
sandwiched between the furnace and the stairs.
photo :
You have to step over the drain any time you enter the basement. I'm
concerned that if I cut the carpet it will begin to fray and tear or become
a tripping hazard.

I'm looking for a suggestion on how I could open the drain without causing
other problems. Any advice would be appreciated.

Thanks in advance,
Marc