Same as SFH. The SFH or STT is a well barrier element installed at the top of the TBIRS or OWIRS that mimics a vertical Xmas Tree. It has actuated and fail-safe isolation valves, flow and kill side outlets and swab valve access for wireline or CT. It is suspended from the top drive using long bails or a coiled tubing lift frame. A dualbore SFT is used when a dualbore TBIRS or dualbore OWIRS is being used with a dualbore subsea Xmas Tree.
