The GSJ Mechanical Setting Tool is used to run, set, and cement liners, as well as to activate liner top packers. A splined, left-hand threaded nut engages left-hand threads in the setting sleeve to support the liner as it is run. The nut is supported by a bearing system to allow easy right-hand release of the running string after the liner hanger is set. A sealing packoff system is included to direct the flow of mud and cement down through the liner, rather than up past the set-ting tool. If a compression set packer is run with the liner, then the setting tool is raised after cementing is complete to expose the packer setting dogs. The running string is then slacked off and weight is applied to the tieback extension

to set the packer.