Abstract
The growth of deviated and horizontal well drilling has limited the number of completion options that can be serviced by slickline units. Modifications to conventional slickline plugs, shifting tools, and setting tools have made it possible to run these tools on coiled tubing into highly deviated wellbores where push capabilities are required. Running and retrieval of gaslift valves, however, has remained the sole domain of slickline services. Declining reservoir pressures have more recently led operators to complete some of these high angle wells with gaslift systems fully realizing that not all of the mandrils will be accessible by conventional slickline units, instead requiring expensive rig workovers. By combining conventional slickline gaslift valve tools with coiled tubing and thorough, detailed job design, horizontal gaslift completions can now be economically worked over to optimise well production.