1. A J-slot guides the guiding pin for hanger setting. The liner hanger can be set easily by picking up the drill string, using right hand rotation to achieve 1/2 turn at the hanger position and lowering the drill string. 2. The liner hanger system without cylinder and setting ball, which is suitable for a liner string with several hydraulically activated tools. 3. Setting tool can be easily released just by slacking off certain weight and using right hand rotation. 4. Retrievable pack-off bushing can be retrieved with setting tool, avoid drill-out.
