Junk Mills

JUNK MILLS

OTI’s junk mills are designed to accomplish heavy-duty milling job. They are dressed with 'Kutrite', which chews up the toughest drilling materials. All of OTI’s junk mills are made from AISI 4145 H material and can be used in both cased and open hole operations.
These are simple, rugged tools that mill all types of junk - bit cones, reamer blades, bridge plugs, packers, squeeze tools and hardbanded tool joints on drill pipe. Wear pads are provided to stabilize the mill, so it cannot wear or cut a hole in the casing while milling.

TYPES OF JUNK MILLS

Normal Junk Mill – OTI’s normal / conventional junk mill is designed removal of cement, packer, general junk and milling of tubing.

Flat Bottom Junk Mill – Major difference between Flat Bottom Junk Mill and Normal Junk Mill is that more amount of hardfacing is applied on Flat Bottom Junk Mill.

Conebuster Junk Mill – Major difference between Conebuster Junk Mill and Flat Bottom Junk Mill is that the face of the mill is given a concave shape. The concave shape helps milling of bit cones and other objects by keeping them centered under the mill.

Cobra Junk Mill – Major difference between Cobra Junk Mill and Flat Bottom Junk Mill is that the blades have an offset design. The Cobra Junk Mill is designed for intensive usage. Its wider blade design allows for maximum weight to put on the mill.

SPECIFICATIONS

Dressed                       Dia (s)

Top Pin
Connection -               API Reg.

Overall Length

Fishing Neck

Approx. Weight                      (Ibs.)

Length

Dia (s)

3-1/2 – 4-1/4

2-3/8

20

12

3 / 3-1/8

45

4-1/2 – 5-1/2

2-7/8

21

12

3-3/4

62

5-1/2 – 5-5/8

3-1/2

23

12

4-1/4

95

 5-3/4 – 7-1/2

3-1/2

23

12

4-3/4

105

7-1/2 – 9

4-1/2

27

12

5-3/4

180

9-1/2 – 12-1/4

6-5/8

29

12

7-3/4

350

13 – 15

6-5/8 , 7-5/8

30

12

7-3/4 / 9-1/2

500

17 – 17-1/2

6-5/8 , 7-5/8

33

12

7-3/4 / 9-1/2

625

18-1/2 – 26

6-5/8 , 7-5/8

37

18

7-3/4 / 9-1/2

1200

Note :

  1. All  dimensions are given in inches, unless otherwise specified.
  2. All weights are approximate.
  3. Standard API regular pin. Other connections are available upon customer request.
  4. Larger sizes are available upon customer request.
  5.    
    Ordering Instructions:

    When ordering or requesting quotations on junk mills, please specify:

    • Mill diameter.
    • Size and weight of casing to be run through, if available.
    • Top connection.
    • Type of Mill – Normal / Flat Bottom / Conebuster / Cobra Mill