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Usage: HWDP is the transition zone between drill collar and drill pipe. It can not only reduce stress-formation in the connection of drill collar and drill pipe, but also reduce the wear on OD. The wall thickness of heavy weight drill pipe is between drill pipe and drill collar, its structure is similar with drill pipe. It is made from premium alloyed steel. Its both tool joints and middle upset are welded hardbands.
Material: 4145H, 4145H Mod and non-magnetic material
Standard: According to API Spec 7-1 standard
Types: Integral and Friction welded
Integral Heavy Weight Drill Pipe
Integral Spiral Heavy Weight Drill Pipe
Technical specifications and parameters for Integral 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 Dia.(in) | Central upset Dia.(in) | Min. drift dia. size(in) |
3 1/2 | 3 1/2 | 2 1/4 | 4 3/4" | 2 1/4 | NC38 | 3 7/8 | 4 | 2 |
2 1/16 | (4 7/8,5) | 2 1/16 | 1 13/16 | |||||
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 | ||||||
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 | ||||||
2 13/16 | 2 13/16 | 2 9/16 | ||||||
5 | 5 | 3 | 6 5/8 | 3 | NC50 | 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 1/2FH | 5 11/16 | 6 | 3 |
3 3/8 | 3 3/8 | 3 1/8 | ||||||
3 7/8 | 3 7/8 | 3 5/8 | ||||||
4 | 4 | 3 3/4 | ||||||
6 5/8 | 6 5/8 | 4 | 8 (8 1/4, 8 1/2) | 4 | 6 5/8FH | 6 15/16 | 7 1/8 | 3 3/4 |
4 1/2 | 4 1/2 | 4 1/4 | ||||||
5 | 5 | 4 3/4 | ||||||
