Drill Collar API 7
The drill pipes, slick drill collars, spiral drill collars, non-magnetic drill collars and accessories we supplied are fully accordance with API Spec 5D and 7. Drill collars are manufactured from AISI 4145H modified steel which are trepanned and drifted according to API Spec 7 while the Non-magnetic drill collars are made from chrome-manganese low carbon alloy or Monel alloy.
The drill pipes, slick drill collars, spiral drill collars, non-magnetic drill collars and accessories we supplied are fully accordance with API Spec 5D and 7. Drill collars are manufactured from AISI 4145H modified steel which are trepanned and drifted according to API Spec 7 while the Non-magnetic drill collars are made from chrome-manganese low carbon alloy or Monel alloy.
|
Outside Diameter, |
Length, |
Typical Bending |
|
3-1/8
|
30
|
2.57:1
|
|
3-1/2
|
30
|
2.42:1
|
|
4-1/8
|
30 or 31
|
2.43:1
|
|
4-3 /4
|
30 or 31
|
2.58:1
|
|
5
|
30 or 31
|
2.38:1
|
|
6
|
30 or 31
|
2.49:1
|
|
6
|
30 or 31
|
2.84:1
|
|
6-1/4
|
30 or 31
|
2.91:1
|
|
6-1/4
|
30 or 31
|
2.63:1
|
|
6-1/2
|
30 or 31
|
2.76:1
|
|
6-1/2
|
30 or 31
|
3.05:1
|
|
6-3 /4
|
30 or 31
|
3.18:1
|
|
7
|
30 or 31
|
2.54:1
|
|
7
|
30 or 31
|
2.73:1
|
|
7-1/4
|
30 or 31
|
3.12:1
|
|
7-3 /4
|
30 or 31
|
2.70:1
|
|
8
|
30 or 31
|
3.02:1
|
|
8-1/4
|
30 or 31
|
2.93:1
|
|
9
|
30 or 31
|
3.17:1
|
|
9-1/2
|
30 or 31
|
2.81:1
|
|
9-3 /4
|
30 or 31
|
2.57:1
|
|
10
|
30 or 31
|
2.81:1
|
|
11
|
30 or 31
|
2.84:1
|