Those are the ones. I've never had them bother my orchids.
Here we don't have a big ant problem. They probably drown in the winter, since we are in the rain forest. Then they bake in the summer. In Ontario we had ants in everything.

No ants in my schomburgkia's, They just appear in random pots and even baskets using bark as a medium

get a Myrmecophyte ..an ant plant. They will move over from your orchids and into the ant plants