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4145H 79.4mm 3 1/8 in OD Non Magnetic Drill Collar for Oil Drilling Equipment
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4145H 79.4mm 3 1/8 in OD Non Magnetic Drill Collar for Oil Drilling Equipment

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4145H,79.4mm,3 1/8 in Outer Diameter Non Magnetic Drill Collar for Oil Drilling Equipment

Description:

Drill collars are manufactured from 4145H modified steel.Drill collars are bored and drifted to API Spec 7-1 and fully heated to meet or exceed the mechanical property requirements of API Spec.Hardness range of 285-341HB and a charpy “V”notch impact value of 54 joules are guaranteed one inch below the surface

When enquiries or orders,please specify:

Slick or spiral ;  Drill collar OD ;  Drill collar bore ;  Length of drill collar;  Connection type

Applications:

Drilling tool stabilizer is an important tool for oil, gas and geology exploration drilling engineering to prevent well deflection. Drill collars,heavy weight drill pipe and lifting subs are tools  matched with stabilizers.

Drill collars are bored and drifted to API Spec 7-1 and fully heated to meet or exceed the mechanical property requirements of API Spec.

Specifications:

1.Material:4145H,4145Mod,40CrMnMo e ct.

 

2. Standard size, inner diameter and thread for drill collar

No.

Outer diameter

Inner diameter

Length
mm

Should chamfering diameter

Bending
strength

mm

in

mm

in

NC23-31

79.4

3 1/8

31.8

1 1/4

9150

76.2

2.57:1

NC26-35

88.9

3 1/2

38.1

1 1/2

9150

82.9

2.42:1

NC31-41

104.8

4 1/8

50.8

2

9150 / 9450

100.4

2.43:1

NC35-47

120.7

4 3/4

50.8

2

9150 / 9450

114.7

2.58:1

NC38-50

127.0

5

57.2

2 1/4

9150 / 9450

121.0

2.38:1

NC44-60

152.4

6

57.2

2 1/4

9150 / 9450

144.5

2.49:1

NC44-60

152.4

6

71.4

2 13/16

9150 / 9450

144.5

2.84:1

NC44-62

158.8

6 1/4

57.2

2 1/4

9150 / 9450

149.2

2.91:1

NC46-62

158.8

6 1/4

71.4

2 13/16

9150 / 9450

150.0

2.63:1

NC46-65

165.1

6 1/2

57.2

2 1/4

9150 / 9450

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Mr. Frank li
Tel: 86-391-6681298
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Jiyuan City Kunyuan Forging Co., Ltd
Huling,Chengliu Town, Jiyuan, Henan, China (Mainland)
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