At 5:50 pm yesterday afternoon after all the drill string had been torqued up and back-off had just started, the string became loose. POOH started immediately and was finished overnight after 4 am. When the POOH ended, it became clear that the joint between the anderdrift and a sub above it had been unscrewed, and that a 17 m long fish was left in the hole. Temperature logging is finished and more logs will follow.