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Drill Collar


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Name: Drill Collar
Name: Beijing Tripod International Trade Co., Ltd
Model:
Brief:

Drill collars are manufactured from AISI 4145H modified steel, and are supplied in the "as rolled" surface finish condition. Alternative surface finishes are available.

Details

 

 table 1  dimensions of drill collar

Thread type

OD

ID

Length

 mm

DF

mm

Referential bending strength ratio

mm

in

mm

in

NC23-31

79.4

3 1/8

31.8

1 1/4

9150

76.2

2.57:1

NC26-35(2 3/8IF)

88.9

3 1/2

38.1

1 1/2

9150

82.9

2.42:1

NC31-41(2 7/8IF)

104.8

4 1/8

50.8

2

9150

100.4

2.43:1

NC35-47

120.7

4 3/4

50.8

2

9150

114.7

2.58:1

NC3850(3 1/2IF)

127.0

5

57.2

2 1/4

9150

121.0

2.38:1

NC44-60

152.4

6

57.2

2 1/4

9150/9450

144.5

2.49:1

NC44-62

158.8

6 1/4

57.2

2 1/4

9150/9450

149.2

2.91:1

NC46-62(4IF)

158.8

6 1/4

71.4

2 13/16

9150/9450

150.0

2.63:1

NC46-65(4IF)

165.1

6 1/2

57.2

2 1/4

9150/9450

154.8

2.76:1

NC46-65(4IF)

165.1

6 1/2

71.4

2 13/16

9150/9450

154.8

3.05:1

NC46-67(4IF)

171.4

6 3/4

57.2

2 1/4

9150/9450

159.5

3.18:1

NC50-67(4 1/2IF)

171.4

6 3/4

71.4

2 13/16

9150/9450

159.5

2.37:1

NC50-70(4 1/2IF)

177.8

7

57.2

2 1/4

9150/9450

164.7

2.54:1

NC50-70(4 1/2IF)

177.8

7

71.4

2 13/16

9150/9450

164.7

2.73:1

NC50-72(4 1/2IF)

184.2

7 1/4

71.4

2 13/16

9150/9450

169.5

3.12:1

NC50-77

196.8

7 3/4

71.4

2 13/16

9150/9450

185.3

2.70:1

NC50-80

203.2

8

71.4

2 13/16

9150/9450

190.1

3.02:1

6 5/8REG

209.6

8 1/4

71.4

2 13/16

9150/9450

195.7

2.93:1

NC61-90

228.6

9

71.4

2 13/16

9150/9450

212.7

3.17:1

7 5/8REG

241.3

9 1/2

76.2

3

9150/9450

223.8

2.81:1

NC70-97

247.6

9 3/4

76.2

3

9150/9450

232.6

2.57:1

NC70-100

254.0

10

76.2

3

9150/9450

237.3

2.81:1

8 5/8REG

279.4

11

76.2

3

9150/9450

266.7

2.84:1

 

 

 

Mechanical properties (drill collar)

OD

 bending strength

0.2 Mpa

tensile strength

b Mpa

elongation

 4%

Brinell hardness

HB

AKVJ

mm

in inch

79.4-171.4

3 1/8-6 3/4

≥758

≥965

≥13

285-341

≥54

177.8-279.4

7-11

≥689

≥930

 

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