Workover

[Yengineer]

So it is an oilwell producing by gas lift.
Now, if you want to change valves you can do it on slickline - no need to kill the well.
If you want to pull tubing, just give this well some crude oil to drink and it will be quite as fish.
If the crude get lost into formation and the well comes into you, just pump some more crude into it (or produced water). No formation damage will happen since there are already formation fluids.
Snubbing is another alternative.