An apparatus is disclosed to allow efficient setting and release from a liner packer connected to a liner assembly. The polished bore adjacent the packer is protected from debris since the setting procedure takes place while the polished bore remains protected. Movements necessary to accomplish the setting procedure occur principally at the uphole end of the polished bore to minimize adverse effects on the integrity of the polished bore from such movements in an area where subsequent operations require a sealing contact.
A system for setting a liner in a well casing which has a liner, a liner hanger, a polished bore receptacle, a packer which can be actuated by applying downward pressure to the polished bore receptacle, a running tool, and a junk bonnet which extends between the polished bore receptacle and the running tool and inhibits the ingress of debris into the polished bore receptacle, the junk bonnet and the running tool provided with apparatus which, when the running tool is raised without removing the junket bonnet from the polished bore receptacle, the apparatus cooperate so that when the running tool is subsequently lowered downward force applied to the running tool will be applied to the polished bore receptacle to set the packer, wherein the apparatus comprises a lip which extends radially outwardly from the running tool, and a hook which is biased radially inwardly from the junk bonnet and including a ring which is disposed to restrict radial inward movement of the hook but which can be displaced by the lip to allow such movement.
