SETTING TOOL FOR SETTING A DOWNHOLE TOOL

A setting tool for setting a downhole toof comprises a housing attached at its downhole end to a setting mandrel. A piston is slidably movable axially inside the housing and defines an upper and lower pressure chambers within the housing. A power charge is disposed in the piston. A crosslink sleeve supported on the setting mandrel is coupled to a crosslink key that extends into a slot in the wall of the setting rnandrel, such that rnOvernent of the crosslink key along the slot also rnoves the crosslink sleeve axially relative to the mandrel. To actuate the setting tool, the power charge is ignited to increase pressure in the upper pressure chamber, thereby exerting an axial force on the piston to directly push the crosslink key, along with the crosslink sleeve, to shift downhole relative to the housing. The shifting of the crosslink sleeve sets the downhole tool.