Yesterday attempts to loosen the string went on by using different approaches. Pumping rate through string or kill-line was varied, tork added occasionally and jarred upwards or downwards but without progress. A temperature log was run in the well down to 1977 m depth from 20:37-00:08 last night (see below and fig. 1, 2 and 3). Because of positive results of the temperature log, it was decided to continue with high pumping rate through motor, downwards jarring and adding many high viscosity pills. At 06:20 the string finally got loose. Now we are pulling out of hole with slow rotation of string and pumping ~20 L/s through the string.