As part of an abandonment campaign started in Feb 2013, Chevron had decided to permanently plug 3 gas producer wells and 2 water producer wells in the Ballena Field, with the main challenge of the footprint of equipment to be used because the original locations were eroded by sea and there was no possibility to use a conventional work over rig. This document presents 2 case studies where a significant advance in the slickline technology that incorporates cutting-edge benefits such as real time visibility and interaction and control, while maintaining slickline advantage simplicity had overcome the project's challenges allowing time and cost reductions.