High Efficiency Grind (mill) shoes - Milling Tools - Drilling Accessories - Downhole tools

High Efficiency Grind (mill) shoes

Tool Description

The mill shoe include flat-bottom mill shoe, concave-bottom mill shoe, tapered bottom mill shoe, pilot mill shoe，pear–shaped mill shoe, washover shoe, high effective cone mill shoe. The flat-bottom mill shoe is a normal tool for grinding downhole small catches and repairing the fish top. The concave-bottom mill shoe is used to grind downhole small objects and other unstable fallen objects.The pilot mill shoe is used to grind the fallen objects which are with internal hole and shaking downhole. The tapered bottom mill shoe is used to repair and maintain small deformed location and clean wall sundries.

Technical parameters and specifications for flat-bottom , concave-bottom , tapered bottom , pear–shaped mill shoe

O.D.(mm)	Thread connection	Suitable hole size (mm)
89	NC26, 2 3/8REG	95.2～101.6
97	NC26, 2 3/8REG	107.9～114.3
110	NC31, 2 7/8REG, 3 1/2REG,	117.5～127.0
121		130.0～139.7
130		142.9～152.4
140	NC38, 3 1/2REG, 4 1/2REG,	155.6～165.1
156		168.0～187.3
178		190.5～209.5
200	NC50, 4 1/2REG,	212.7～241.3
232	NC50, 4 1/2REG,	244.5～269.9.
257	6 5/8REG,	273.0～295.3
279		298.5～317.5
295		320.6～346.1
330		349.3～406.4
381		406.4～444.5
406	7 5/8REG,	431.8～508.0
432		457.2～533.4
534		558.8～660.0
686		711.2～863.6

Technical parameters and specifications for pilot mill shoe

O.D.(mm)	O.D. of the milled tube(mm)	Wing length (mm)	Thread connection	Suitable hole size (mm)
97	73–89	≥ 150	NC26	107.9～114.3
121	90–102	≥ 150	NC31, 2 7/8REG, 3 1/2REG,	130.0～139.7
130	100–160	≥ 200		142.9～152.4
140	110–120			155.6～165.1
156	127		3 1/2REG,	168.0～187.3
178	158–168		4 1/2REG	190.5～209.5
200	168–178			212.7～241.3
232	194			244.5～269.9
257	210–219	≥ 250	6 5/8REG	273.0～295.3
279	220–230	≥ 250		298.5～317.5
295	240–246	≥ 300		320.6～346.1
330	273			349.3～406.4
381	320			406.4～444.5

Technical parameters and specifications for washover shoe

O.D.(mm)	I.D.(mm)	Length (mm)	MIn-Hole size (mm)	Max washover string (mm)
117	99.57	500– 1000	120.65	88.90
136	108.61		146.05	101.60
145	124.26		155.58	120.65
	121.36		155.58	117.48
	118.62		155.58	114.30
177	150.39		187.33	142.88
190	159.41		200.03	152.40
202	174.63		212.73	168.28
	171.83		212.73	165.10
	168.28		212.73	161.93
205	184.15		215.90	177.80
209	187.58		219.08	180.98
234	198.76		244.48	190.50
234	193.68		244.48	187.33
240	207.01		250.83	200.03
256	224.41		266.70	215.90
256	220.50		266.70	212.73
288	252.73		298.45	244.48
288	247.90		298.45	238.13
313	276.35		323.85	266.70
313	273.61		323.85	263.53
355	317.88		365.13	307.98
434	381.25		444.50	368.30
498	448.44		508.00	438.15
574	525.65		584.20	479.43

CONOVA has a rigorous, efficient, and professional technical service team, including technical consultation, solution design, downhole tool customization, on-site technical services, and oil and water control effects evaluation.

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