Home > Products > Drilling Products > Oil Country Tubular Goods > Heavy Weight Drill Pipe
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We supply welded and integral heavy weight drill pipe (API 7-1); their sizes are from 3-1/2 to 6-5/8 inches. |
Heavy Weight Drill Pipe Specifications* (API 7-1)
Outside Diameter, in. |
Inside Diameter, in. |
Connection |
Tool Joint OD , in. |
Tool Joint ID , in. |
Center Upset Diameter, in. |
3-1/2 |
2-1/4 |
NC38 |
4-3/4 (4-7/8, 5) |
2-1/4 |
4 |
2-1/16 |
2-1/16 |
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4 |
2-1/2 |
NC40 |
5-1/4 |
2-1/2 |
4-1/2 |
2-9/16 |
2-9/16 |
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4-1/2 |
2-11/16 |
NC46 |
6-1/4 |
2-11/16 |
5 |
2-3/4 |
2-3/4 |
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2-13/16 |
2-13/16 |
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5 |
3 |
NC50 |
6-5/8 |
3 |
5-1/2 |
5-1/2 |
3-1/4 |
5-1/2FH |
7 (7-1/4, 7-1/2) |
3-1/4 |
6 |
3-3/8 |
3-3/8 |
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3-7/8 |
3-7/8 |
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4 |
4 |
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6-5/8 |
4 |
6-5/8FH |
8 (8-1/4, 8-1/2) |
4 |
7-1/8 |
4-1/2 |
4-1/2 |
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5 |
5 |
*For both integral and welded heavy weight drill pipe.