Description:
Heavy weight drill pipe is the most commonly used in the vertical section of the hole and provides weight on the bit for directional drilling while maintaining more flexibility than a drill collar.Heavy weight drill pipe has a "center upset", also known as wear pad, that increases tube life by protecting the tube from wearing on the outer diameter by keeping the tube away from the hole wall. It also reduces hole drag and differential sticking problems.
Function:
Heavyweight drill pipe (HWDP) may be used to make the transition between the drill collars and drill pipe. The function of the HWDP is to provide a flexible transition between the drill collars and the drill pipe
Standard: API SPEC 7-1
Material: AISI 4145 H, AISI 4145 H MOD, Non-mag material
Specification: 3-1/2", 4-1/2", 5", 5-1/2"
Type: Integral & Friction welded
Techinical Parameter:
Heavy weight drill pipe | |||||||||||||
Products Range: 2-7/8" ~6-5/8" | Material: AISI 4145H, AISI1340 | Type of End Finish: integral, welded type | |||||||||||
OD | W | Body ID | Upset OD | Upset Length | Elevator upset OD | Connection | Yield strength | Body Data | |||||
Conn type | ID | OD | Length Pin/Box | Body | Tool joint | Tens. Yield | Tors. Yield | ||||||
A | B | C | D | E | F | G | I/H | ||||||
in | Lb/ft | in | in | in | in | in | in | in | ksi | ksi | lbs | Ft-lbs | |
2-7/8 | 17.4 | 1-3/4 | 3-1/4 | 24 | 3-3/16 | NC31 | 1-3/4 | 4-1/8 | 27/21 | 65 | 120 | 265,600 | 12,600 |
3-1/2 | 25 | 2-1/16 | 4 | 24 | 3-5/8 | NC38 | 2-1/16 | 4-3/4 | 27/21 | 65 | 120 | 408,200 | 23,100 |
3-1/2 | 23.4 | 2-1/4 | 4 | 24 | 3-5/8 | NC38 | 2-1/4 | 4-3/4 | 27/21 | 65 | 120 | 366,900 | 21,800 |
4 | 38.8 | 2-1/2 | 4-1/2 | 24 | 4-3/16 | NC40 | 2-1/2 | 5-1/4 | 27/21 | 65 | 120 | 497,700 | 33,300 |
4-1/2 | 40.8 | 2-13/16 | 5 | 24 | 4-11/16 | NC46 | 2-13/16 | 6-1/4 | 27/21 | 65 | 120 | 548,100 | 47,400 |
5 | 49.5 | 3 | 5-1/2 | 24 | -1/8 | NC50 | 3 | 6-5/8 | 27/21 | 65 | 120 | 816,800 | 66,800 |
5-1/2 | 49.6 | 3-7/8 | 6 | 24 | 5-11/18 | 5-1/2FH | 3-7/8 | 7 | 27/21 | 65 | 120 | 777,700 | 76,900 |
5-7/8 | 58.2 | 3-7/8 | 6-3/8 | 24 | 6 | 5-1/2FH | 4 | 7 | 27/21 | 65 | 120 | 995,500 | 100,900 |
6-5/8 | 59 | 5 | 7-1/8 | 24 | 6-15/16 | 6-5/8FH | 5 | 8 | 27/21 | 65 | 120 | 946,400 | 120,500 |
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