A total of 455.89 m of casing was milled at an average milling ROP of 2-3 m/h at the casing body and 0.5-1.0 m/h through the casing collars. A 17 1/4-in string stabilizer was used above the Hevi-Wate transition drillpipe to stir and prevent the metal swarf from bird nesting at the wellhead area due to a change in cross-sectional area. The amount of metal swarf that came to surface increased proportionally to the flow rate.