Comment Re:Stop connecting it to the internet (Score 1) 83
Control networks were around long before "the internet" existed. Remote sites like these would probably have employed a mixture of strip chart recorders collected at regular intervals (still in use to this day), a VHF/UHF radio link, maybe even a satellite uplink. You probably did less actual control because the link might have been one-way, but if you are running an oil well, there is also storage tank filling up that you needed to get a signal from the high level switch telling you to get your ass out there and empty the tank.
Long ago they just had people making rounds, and tanks just overflowed into berms if you didn't get there in time. I've seen the results myself. But we're all better off with this infrastructure communicating back to a central control.