Drilling ahead. Switchfloats acting as normal flapper type non return valves. Next Image Opening Switchfloat valves. One run in hole with a slickline shifting tool to open all Switchfloat valves. Next Image Wireline operations Tools safely conveyed through open Switchfloat valves. Next Image Closing Switchfloat valves. One slickline run in hole with a shifting tool to close one, some, or … Continue reading description