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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Products
ContactUs
Email: zdyk66@163.com
Minghu Building, No.24 Huangsi Street, Xicheng District Beijing
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