tool assembly by lifting upward and pushing downward on the tool string application_number US 60975609 A description referring now to the drawings and more particularly to fig1 a and 1b the locking slot assembly of the present invention is shown and generally designated by the numeral 10 locking slot assembly 10 is disposed adjacent to a lower end of a tool 12 shown in fig2 a which is of a kind known in the art such as a valve a packer or any tool requiring different positions tool 12 may connect to a tool string not shown and the entire tool string may be positioned in a well bore the well bore may be defined by a casing not shown and may be vertical or the well bore may be deviated to any degree locking slot assembly 10 is illustrated below the tool 12 tool 12 may include or be attached to an inner actuating mandrel 14 which may be connected to the tool string locking slot assembly may include the actuating mandrel 14 attached at a lower end to bottom adapter 16 actuating mandrel 14 and at least a portion of bottom adapter 16 may be situated within a fluid chamber case 18 and or a lock 20 the fluid chamber case 18 and the lock 20 may be removably attached fixedly attached or even integrally formed with one another alternatively fluid chamber case 18 and lock 20 may be separate at least one fluid chamber 22 may be situated between actuating mandrel 14 and lock 20 fluid chamber 22 may be sealed via one or.