I think I saw some of those when I was working with guys who designed oilfield tools. It was always a challenge to find stuff with a decent MTBF in the 150C+ oi

I think I saw some of those when I was working with guys who designed oilfield tools. It was always a challenge to find stuff with a decent MTBF in the 150C+ oilwell environment. IIRC, there was no published info on it, so we bought a ton of different brands and models, tested them all in-house, and built tools with the ones that performed the best.