Sounds like the thing that is already partly automated (search term "pigging"): https://www.rigzone.com/images/howitworks/HIW_pigging_3.jpg https://www.rigzone

Sounds like the thing that is already partly automated (search term "pigging"): https://www.rigzone.com/images/howitworks/HIW_pigging_3.jpg https://www.rigzone.com/images/howitworks/HIW_pigging_3.jpg