Description of Washover shoeï¼? The washover shoe is also called as oriented washover mill which is used to remove all kinds of dirties between pipe strings and casings. The washover shoe is applied to wash over cements, hard sand settings, gypsite and crystals calcium carbonate in annular space, etc. 1. Washing over is an effective method of freeing stuck pipe in the wellbore, by cutting away and circulating out obstructions hindering the pipes movement. 2. The washover shoe is also called as oriented washover mill which is used to remove all kinds of dirties between pipe strings and casings. 3. It is applied to wash over cements, hard sand settings, gypsite and crystals calcium carbonate in annular space, etc.