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High-efficiency Milling Tools

Product Material

Take flat bottom mill shoes as an example:

The main body adopts high-performance alloy steel(4145H) to ensure the smooth and effective operation under various drilling pressure and rotary speed situation. Meanwhile, we adopt high level tungsten carbide meterial to achieve fast milling. Stabilizer and outside skirt for junk mill and taper mill can be designed as need.

Tungsten carbide insert

·Superloy
Good filler for watermelon, string and taper mills.
Good back for junk mills.
Wide range of sizes available.
Most rugged.

· Metal Muncher
Mills faster than conventional milling tools.
Reduces required drilling pressure while milling.
Leaves smoother cuts with no lips for debris to hang on.
Produces debris with similar size.
Cutting metal instead of grinding it.

· Opti-cut
Smaller debris.
Faster ROP.
Longer life.
Lower pressure and torque requirements.
16 cutting points and 8 cutting edges for each cutter.

Product Category

Concave/Flat/Blade Bottom junk mill
Used for milling bit, cone, diameter gauge, grapple teeth, wash pipe, drilling tool joint, deep well pump accessories, packer, water distributor and other longer drilling tools.
Petrozhr junk mill are available in various configurations and geometries. Our advanced mill engineering and experienced welder ensure a consistent and durable cutting structure on every junk mill.

Tab. 1 Flat/Concave/Blade Bottom junk mill parameter

Borehole Dia.    Mill Shoe OD     Recommended    Length
(mm)        (mm)      Screw Thread      (mm)
P.N.

Flat

P.N.
Concave
P.N.
Bladed
95.2- 101.6                   89                     2-3/8REG              250 JM089FX JM089CX JM089BX
107.9- 114.3                  97                     2-3/8REG              250 JM097FX JM097CX JM097BX
117.5- 127                   110                    2-7/8REG              250 JM110FX JM110CX JM110BX
130- 139.7                   121                    2-7/8REG              250 JM121FX JM121CX JM121BX
142.9- 152.4                 130                    2-7/8REG              250 JM130FX JM130CX JM130BX
155.6- 165. 1                 140                    3- 1/2REG              250 JM140FX JM140CX JM140BX
168- 187.3                   156                    3- 1/2REG              250 JM156FX JM156CX JM156BX
190.5-209.5                 178                    3- 1/2REG              250 JM178FX JM178CX JM178BX
212.7-241.3                 200                    4- 1/2REG              250 JM200FX JM200CX JM200BX
244.5-269.9                 232                    4- 1/2REG              250 JM232FX JM232CX JM232BX
273-295.3                  257                    6-5/8REG              250 JM257FX JM257CX JM257BX
298.5-317.5                 279                    6-5/8REG              250 JM279FX JM279CX JM279BX
320.6-346. 1                 295                    6-5/8REG              250 JM295FX JM295CX JM295BX
349.3-406.4                 330                    6-5/8REG              250 JM330FX JM330CX JM330BX
406.4-444.5                 381                    6-5/8REG              250 JM381FX JM381CX JM381BX

Rotary Shoe

Rotary shoe adopts carbide material inside the cylinder to circumferentially cut irregular fish top, and gradually repair the damaged fish top into a circle, such as tubing, casing body, etc.

[Note: Because the inner milling tooth diameter of rotart shoe is large, the reverse torque is large, so low pressure and slow rotation mode should be adopted in the use of rotary shoe. In general, the drilling pressure should not exceed 10 KN and the rotational speed should not exceed 50 r/min.]

Tab.2 Rotary shoe parameter

Casing/Wellbore
Dia.
Rotary shoe OD
(mm)
Rotary shoe
Length
(mm)
Recommanded Screw Thread P.N.
Rotary Shoe
4in 101.6mm 95                        400 FJWP TXX095
5- 1/2in 139.7mm 114                       500 FJWP TXX114
5-3/8in 146.05mm 118                       500 FJWP TXX118
6-5/8in 168.28mm 136                       425 FJWP TXX135
7in 177.8mm 152                       450 FJWP TXX152
7-5/8in 193.68mm 160                       450 FJWP TXX160
8-5/8in 219. 1mm 185                       550 FJWP TXX185
12- 1/4in    311. 15mm 203                       450 FJWP TXX203
15-5/8in    396.88mm 298                       450 FJWP TXX298
20in 508mm 406                       450 FJWP TXX406

Taper Mill

Taper mill reams out restrictions,collapsed casing and liner sections and deburr whipstock windows and casing.The low end of taper mill,with its small,diameter enters the collapsed casing and liner.Then slightly spiraled reamer edges to mill away the under section to full mill diameter.

Taper mill consists of a conical body and tungsten carbide. The taper of the body is 30 degrees, the cone is wing-shaped, and the surface is hardfacing or inlaying tungsten carbide.

Tab.3 Taper mill parameter

Borehole Dia.            Taper mill OD     Recommanded        Length

(mm )             (mm )       Screw Thread         (mm )

P.N.

Taper mill

95- 101.6 89 2-3/8REG                300 XZ089
107.9- 114.3                         97                     2-3/8REG                300 XZ097
117.5- 127.0                        110                    2-7/8REG                300 XZ110
130- 139.7                          121                    2-7/8REG                300 XZ121
142.9- 152.4                        130                    2-7/8REG                300 XZ130
155.6- 165. 1                        140                    3- 1/2REG                300 XZ140
168- 187.3                          156                    3- 1/2REG                300 XZ156
190.5-209.5                        178                    3- 1/2REG                300 XZ178
212.7-241.3                        200                    4- 1/2REG                300 XZ200
244.5-269.9                        232                    6-5/8REG                350 XZ232
273-295.3                         257                    6-5/8REG                350 XZ257
298.5-317.5                        279                    6-5/8REG                350 XZ279
320.6-346. 1                        295                    6-5/8REG                350 XZ295
349.3-406.4                        330                    6-5/8REG                350 XZ330
406.4-444.5                        381                    6-5/8REG                350 XZ381

Watermelon String Mill

Watermelon string shoe is one of the milling tools in sidetracking operation. It is used for repairing casing, reaming and opening channels. It is usually used immediately after opening windows. The milling edge (working area) of the watermelon mill contacts the borehole wall, and the end of each edge is designed as a cone. When the window is being opened, the watermelon mill can lengthen the window from the top and remove the scaling and burrs left on the pipe wall during the initial cutting.

Tab.4 Watermelon string mill parameter

Borehole Dia.   Screw (mm/in )   Thread Working Area
OD
(mm/in )
Working Area Length      (mm/in ) Totul Length (mm/in ) P.N.
139.7 (5- 1/2)    NC 26        112 (4-7/ 16)         600 (23-5/8) 1130 (44) XGMX112
139.7 (5- 1/2)    NC 26        116 (4-9/ 16)         600 (23-5/8) 1130 (44) XGMX116
139.7 (5- 1/2)    NC 26         118 (4-5/8)          600 (23-5/8) 1130 (44) XGMX118
139.7 (5- 1/2)    NC 31         120 (4-3/4)          600 (23-5/8) 1280 (50) XGMX120
146.0 (5-3/4)    NC 31         124 (4-7/8)          600 (23-5/8) 1280 (50) XGMX124
168.3 (6-5/8)    NC 31        142 (5-9/ 16)         600 (23-5/8) 1280 (50) XGMX142
177.8 (7)        NC 31       151 (5- 15/ 16)        600 (23-5/8) 1280 (50) XGMX151

Pilot mill

Pilot mill are designed for milling casing ,liner,rotary shoe or large ID tubing. The cutting blades dressed with high class tungsten carbide material make Petrozhr pilot mill could achieve fast penetration with minimal wear.The small and curled cutting debris is easy to remove. And the pilot end is used to stabilize in the ID of the object that being milled.

Tab.5 Pilot mill parameter

Borehole
Dia.
(mm )
Screw
Thread
Working Area
OD
(mm )
Cutting blade Length      (mm ) Pilot area Length
(mm)
P.N.
153          2 3/8REG 130                      200 ≧45 LYMX130
165          2 3/8REG 140                      200 ≧45 LYMX140
187          3 1/2REG 156                      200 ≧55 LYMX156
210          4 1/2REG 178                      200 ≧55 LYMX178
241          4 1/2REG 200                      200 ≧55 LYMX200
270          4 1/2REG 232                      200 ≧55 LYMX232
295          6 5/8REG 257                      250 ≧55 LYMX257
317          6 5/8REG 279                      250 ≧55 LYMX279
346          6 5/8REG 295                      300 ≧55 LYMX295
406          6 5/8REG 330                      300 ≧55 LYMX330
445          6 5/8REG 331                      300 ≧55 LYMX331

Tungsten carbide application chart

Recommanded application Superloy Opti-cut Metal-muncher Metal-muncher

with Superloy

Washover open hole    
Washover drill pipe      
Washover gravel pack    
Washover liner trim      
Washover packer      
Poilt milling      
Loose Junk milling    
Stationary packer or pipe or tubingjunk milling      
Watermelon milling      
String milling    

Fishing Item Pictures


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