Exhaust line choke

During a routine walk down then found this exhaust line rainbow color.

Rainbow means something choke there, maybe due to the line bented , so the powder accumulated there easily and next slowly leak through from there over time.

So no choice, but to schedule to down the tool and arrange with cleaning vendor for 1 day to clean up the choke part especially.

Tool will be down because the pump will stop pumping down the residue gases. While waiting for the scheduled clean, need to arrange paper work for necessary works to be done.