Coiled tubing pulling tool

摘要

An improved coiled tubing pulling tool and methods of using the pulling tool for pulling a well tool from a well bore, relocating a well tool in the well bore and performing other similar operations. The pulling tool is basically comprised of an elongated inner mandrel having an axial fluid flow passageway therethrough adapted to be connected to a length of coiled tubing, a latching mandrel connected at the end of the inner mandrel having a fluid flow passageway therethrough and having a fishing nose thereon, a tubular piston member slidably extending over the inner mandrel which is movable by fluid pressure in a direction away from the fishing nose, a first spring disposed between the inner mandrel and the piston member for urging the piston member in a direction towards the fishing nose, a latching device disposed on the latching mandrel connected to the piston member before latching the pulling tool to a fishing neck of a well tool and a releasing system for unlatching the pulling tool when sufficient fluid pressure is applied to the pulling tool to overcome the spring and move the piston member away from the fishing nose.