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Heavy Weight Drill Pipe
Heavy Weight Drill Pipe (short for HWDP) is also called Heavy Wall Drill Pipe. It is an intermediate weight drill stem component which is used in conjunction with the drill pipe and drill collars.
The characteristics of heavy weight drill pipe is to be like the same drill collar under pressure. A unique characteristic of the drill pipe is that the middle part of the drill pipe is provided with a hard banding. The hard banding can play the role of stabilizer, improve the heavy weight drill pipe on drill string stiffness, reducing well oblique. In some applications, Heavy- Weight Drill Pipe also can be used instead of the Drill Collar.
Material: AISI 4145H Mod.
Type: standard, spiral and non-magnetic
Standard: API, NS-1
Length: 9150--9450 mm
Hard Banding and Inner Coating could be provided as per the customers’ requirements.
Please specify when ordering:
Size, Type, Quantity, Connection, Hard Banding, etc.
Technical Parameters--Heavy Weight Drill Pipe
| Size(in) |
O.D. (in) |
I.D. (in) |
Tool Joint O.D. (in) |
Tool Joint I.D. (in) |
Connection |
Max elevator diameter (in) |
Central upset dia. (in) |
Min.drift dia.size (in) |
|
3 1/2 |
3 1/2 |
2 1/4 |
4 3/4 (4 7/8,5) |
2 1/4 |
NC38 |
3 7/8 |
4 |
2 |
2 1/16 |
2 1/16 |
1 13/16 |
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|
4 |
4 |
2 1/2 |
5 1/4 |
2 1/2 |
NC40 |
4 3/16 |
4 1/2 |
2 1/4 |
2 9/16 |
2 9/16 |
2 5/16 |
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4 1/2 |
4 1/2 |
2 11/16 |
6 1/4 |
2 11/16 |
NC46 |
4 11/16 |
5 |
2 7/16 |
2 3/4 |
2 3/4 |
2 1/2 |
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2 13/16 |
2 13/16 | 2 9/16 |
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5 |
5 |
3 |
6 5/8 |
3 |
NC5 |
5 1/8 |
5 1/2 |
2 3/4 |
5 1/2 |
5 1/2 |
3 1/4 |
7 (7 1/4,7 1/2) |
3 1/4 |
5 1/2 FH |
5 11/16 |
6 |
3 |
3 3/8 |
3 3/8 |
3 1/8 |
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3 7/8 |
3 7/8 |
3 5/8 |
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http://www.gaotondrillings.com/
