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Workover Tools

Impressions Block

Application
1. Determines fish depth
2. Finds the shape of the top of the fish
3. To check the deformed shape of the internal diameter of the casing
The Impression blocks are available in flat-bottom type and conical type

Specifications
Specification Thread Connection I.D. of lead die Length(mm) Total length
O.D. Thread Connection (in)
270 203 6 5/8REG 40 150 450
225 165 4 1/2IF 40 130 400
195 159 4 IF 30 120 350
170 121 3 1/2IF 30 120 300
120 108 2 7/8IF 20 100 300
100 89 2 1/2ZG 20 100 250
Cutting Pilot Mill Shoe

The Cutting pilot mill shoe can be used to mill downhole junk such as drill pipes, drill collars and tubing, etc.

Specifications
Type Outside size (mm) Connection Casing Size (in)
XLX114 ф114×ф38×580 NC31 5 1/2
XLX154 ф154×ф50×610 NC38 7
Taper Mill Tap

The taper mill tap is a special tool for opening up a passage within the casing.

Specifications
Type outside size(mm) Connection Casing Size (in)
ZLX114 ф114×1000 NC31 5 1/2
ZLX116 ф116×1000 NC31 5 1/2
ZLX118 ф118×1000 NC31 5 1/2
ZLX120 ф120×1000 NC31 5 1/2
ZLX144 ф144×1200 NC38 7
ZLX154 ф154×1200 NC38 7
ZLX158 ф158×1200 NC38 7
Flat-bottom Mill Shoe

The flat-bottom mill shoe is used to mill downhole junk with its bottom face overlaid with YD alloy.

Specifications
Type O.D (mm) Connection (Box) Casing Size (mm)
MP89 89 2 3/8 REG 95.2-101.6
MP97 97 NC26 107.9-114.3
MP110 110 NC26 117.5-127.0
MP121 121 NC31 130.0-139.7
MP130 130 NC38 142.9-152.4
MP140 140 NC38 155.6-165.1
MP156 156 NC38 168.0-187.3
MP178 178 NC50 190.5-209.5
MP200 200 NC50 212.7-241.3
MP232 232 NC50 244.5-269.5
MP257 257 6 5/8 REG 273.1-295.3
MP279 279 6 5/8 REG 298.5-317.5
MP295 295 6 5/8 REG 320.6-346.1
MP330 330 6 5/8 REG 349.3-406.4
MP381 381 7 5/8 REG 406.4-444.5
Concave-Bottom mill Shoe

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

Specifications
Type O.D (mm) Connection (Box) Casing Size (mm)
MP89 89 2 3/8 REG 95.2-101.6
MP97 97 NC26 107.9-114.3
MP110 110 NC26 117.5-127.0
MP121 121 NC31 130.0-139.7
MP130 130 NC38 142.9-152.4
MP140 140 NC38 155.6-165.1
MP156 156 NC38 168.0-187.3
MP178 178 NC50 190.5-209.5
MP200 200 NC50 212.7-241.3
MP232 232 NC50 244.5-269.5
MP257 257 6 5/8 REG 273.1-295.3
MP279 279 6 5/8 REG 298.5-317.5
MP295 295 6 5/8 REG 320.6-346.1
MP330 330 6 5/8 REG 349.3-406.4
MP381 381 7 5/8 REG 406.4-444.5
Rolling- Ball Flat-Bottom Mill Shoe

The rolling-ball flat-bottom mill shoe whose bottom face is overlaid with YD alloy is used to fully grind junk stuck within the downhole. Additionally, rolling balls which are installed on the cylinder face of the mill shoe can guarantee the device will not damage the inside wall during milling operation.

Specifications
Type Outside size (mm) Connection Casing size (in)
GQM140 ф118×460 NC31 5 1/2
GQM168 ф146×480 NC38 6 5/8
GQM178 ф155×500 NC38 7
Inner Tooth Shoe

The inner tooth shoe is mainly used to mill damaged fish tops, such as tubing and drill pipes.

Specifications
Type Outside size (mm) Tooth numbers Connection Casing size (in)
NCX114 Ф95×430 24 NC26 4 1/2
NCX140 ф114×500 26 NC31 5 1/2
NCX168 ф136×500 30 NC38 6 5/8
NCX178 ф152×500 30 NC38 7
Outer Tooth Shoe

The outer tooth shoe is a special tool for washing over casing walls and cutting fish tops. Additionally, it is used to mill away cement sheaths, mineral crystals and some edge burrs left from the casing wall.

Specifications
Type Outside size (mm) Tooth numbers Connection Casing size (in)
WCX106 ф106×460 14 NC31(210) 5
WCX110 ф110×460 14 NC31(210) 5
WCX115 ф115×500 15 NC31(210) 5 1/2
WCX118 ф118×460 15 NC31(210) 5 1/2
WCX121 ф121×460 16 NC31(210) 5 1/2
WCX123 ф123×460 20 NC31(210) 5 1/2
WCX126 ф126×460 20 NC31(210) 5 1/2
WCX140 ф140×500 26 NC31(210) 6 5/8
WCX142 ф142×500 26 NC31(210) 6 5/8
WCX144 ф144×500 26 NC31(210) 6 5/8
WCX146 ф146×500 26 NC31(210) 6 5/8
WCX148 ф148×500 26 NC31(210) 6 5/8
WCX150 ф150×500 26 NC31(210) 6 5/8
WCX152 ф152×500 28 NC38(310) 7
WCX154 ф154×500 28 NC38(310) 7
WCX157 ф157×500 28 NC38(310) 7
WCX159 ф159×500 28 NC38(310) 7
Washover Shoe

The washover shoe is also called an oriented washover mill which is used to remove all kinds of impurities between the pipe strings and casings. The washover shoe is applied to wash cements, hard sand, gypsite and calcium carbonate in annular spaces.

Specifications
Type Outside size (mm) Tooth numbers Connection Casing size (in)
PMB114 ф95×75×1300 NC26 For 2 7/8" tubing 4 1/2
PMB127 ф118×95×1300 NC31 For 3 1/2"tubing 5 1/2
Pear Type Mill Shoe

The pear type mill shoe can be used to mill small local deformations of the casing and finish all flanged edges, burrs of casing at coupling caused by all kinds of tools during running in hole and by perforation as well as remove all minerals and other hard settings around the well wall so as to restore casing drift diameter.

Specifications
Type Outside size(mm) Connection Casing Size (in)
LMX114 90 ~ 96 2 3/8 REG 4 1/2
LMX114 96 ~ 102 NC26(2A10) 4 1/2
LMX127 104 ~ 112 NC26(2A10) 5
LMX140 112 ~ 124 NC31(310) 5 1/2
LMX168 142 ~ 152 NC38(310) 6 5/8
LMX178 152 ~ 164 NC38(310) 7
Pilot Wedged Mill Tap

The pilot wedged mill tap is a special tool for opening up a passage within the casing.

Specifications
Type Outside size(mm) Connection Casing Size (in)
LXZ110 ф110×ф50×1500 NC26(2A10) 5 1/2
LXZ118 ф118×ф50×1500 NC31(210) 5 1/2
LMX140 ф140×ф80×1500 NC38(210) 7
LMX155 ф155×ф80×1500 NC38(210) 7
Breaking and Milling Tool

The breaking and milling tool is a tool used to cut and mill a sections of the casing so drilling can continue more smoothly.

Specifications
Type Outside size(mm) Connection Casing Size (in)
DXG140 118 NC31 5 1/2
DXG178 152 NC38 7
DXG245 220 NC50 9 5/8
Compound Washover Head

The compound washover head is used to renovate catch OD and remove residues such as rock, sand, and solid cement around fish, etc. The wash over heads are available in composite type washover heads and arched type washover heads The composited type washover head is mainly used for removing casings during workover operation.

Specifications
Specifications and parameters for compound washover head
Type Connection Max. Catch OD
YXT-190 7"FWJP 153
YXT-235 8 5/8"FWJP 190
YXT-255 9 5/8"FWJP 212
YXT-265 9 5/8"FWJP 215
Specifications and parameters for composite type wash-over head
Type Connection Max. Catch OD
FXT-190 7"FWJP 153
FXT-235 8 5/8"FWJP 190
FXT-255 9 5/8"FWJP 212
FXT-265 9 5/8"FWJP 215
Milled Tap Pup Joint

The milled tap pup joint is a tool used for opening up passages in the casing.

Specifications
Type Outside size(mm) Connection Casing Size (in)
XZD120-1 ф120×1000 NC31 5 1/2
XZD120-2 ф120×1200 NC31 5 1/2
XZD120-3 ф120×1500 NC31 5 1/2
XZD160-1 ф160×1200 NC38 7
XZD160-2 ф160×1500 NC38 7
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