Mill Shoes

Mill Shoes are be divided into three kinds:flat-bottom mill shoe, guide mill shoe and cone mill shoe according to structure and shapes. At the milling surface, the carbide particles and hard alloy column are built up by welding, which plays a part of self-milling.

The concave bottom mill shoe is used to grind downhole small objects and other unstable fallen objects.

Type	Size(mm)	Thread	Wellhole(mm)
MA89	89	2 3/8 REG	95.2-101.6
MA97	97	NC26	107.9-114.3
MA110	110	NC26	117.5-127.0
MA121	121	NC31	130.0-139.7
MA130	130	NC38	142.9-152.4
MA140	140	NC38	155.6-165.1
MA156	156	NC38	168.0-187.3
MA178	178	NC50	190.5-209.5
MA200	200	NC50	212.7-241.3
MA232	232	NC50	244.5-269.5
MA257	257	6 5/8 REG	273.1-295.3
MA279	279	6 5/8 REG	298.5-317.5
MA295	295	6 5/8 REG	320.6-346.1
MA330	330	6 5/8 REG	349.3-406.4
MA381	381	7 5/8 REG	406.4-444.5