You recall correctly: https://en.wikipedia.org/wiki/Pigging https://en.wikipedia.org/wiki/Pigging I think my introduction to these devices was one of the thre

You recall correctly: https://en.wikipedia.org/wiki/Pigging https://en.wikipedia.org/wiki/Pigging I think my introduction to these devices was one of the three Bond films they mention in the article, probably Diamonds are Forever.