At 4.55 a.m. on 18th May 2014 during POOH Fishing BHA, Operator was tripping out the first joint of 3-1/2” drill pipe at the first stroke after disconnected the kelly hose, someone shouted an order him to lowered the string because the stationary slip hang onto the string. While operator was lowering the string, the stationary slip fell and struck against the hydraulic line of Jack, and effect to the hydraulic line of Jack broken and Jack unable to operated