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Oilfield Tubular
Heavy Weight Drill Pipe
Quality Standard:
API 7 specification for rotary drill stem elements
API 5DP specification for drill pipe
Steel Grade:
Integral hwdp : aisi 4145hm
Welded hwdp : aisi 1340 pipe body, aisi 4140hm tool joint
Sizes Range:
Outer Diameter: 2 7/8”- 6 5/8”
Weight Range: 6.27#/ft through 27.72#/ft
Lengths: range 2 and range 3
End Finishes: internal upset, external upset, plain end upset, non upset
Tool Joint Type: nc38、nc46、nc50、5-1/2 fh
Application:
Heavy weight drill pipe (hwdp) is usually run in between the drill collars and the drill pipe in order to prevent fatigue of the drill pipe in the vertical drilling industry. heavy weight drill pipe is also utilized in the horizontal directional drilling (hdd) industry for added strength in high stress situations. heavy weight 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
Specification
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. The walls of heavy weight drill pipe are thicker and have longer upsets compared to conventional drill pipe, as well as being stronger with high tensile strength.
Feature:
A. High precision in size and shapeB. Good low temperature toughness
C. Excellent comprehensive mechanical properties
D. High connection strength and sealability
E. Large inside diameter of tool joint
F. High torque resistance
G. High fatigue strength and long fatigue life
Internal Coating Feature:
A.High abrasion resistance and low friction factorB. Good adhesion and flexility
C. High application temperature and pressure
D. High hardness and impact resistance
E. Good corrosion resistance
Outside Diameter, |
Inside Diameter, |
Connection |
Tool Joint OD , |
Tool Joint ID , |
Center Upset |
Central upset dia (in) |
Min. drift dia. size (in) |
3-1/2 |
2-1/4 |
NC38 |
4-3/4 (4-7/8, 5) |
2-1/4 |
4 |
4 |
2 |
2-1/16 |
2-1/16 |
1 13/16 |
|||||
4 |
2-1/2 |
NC40 |
5-1/4 |
2-1/2 |
4-1/2 |
4 1/2 |
2 1/4 |
2-9/16 |
2-9/16 |
2 5/16 |
|||||
4-1/2 |
2-11/16 |
NC46 |
6-1/4 |
2-11/16 |
5 |
5 |
2 7/16 |
2-3/4 |
2-3/4 |
2 1/2 |
|||||
2-13/16 |
2-13/16 |
2 9/16 |
|||||
5 |
3 |
NC50 |
6-5/8 |
3 |
5-1/2 |
5 1/2 |
2 3/4 |
5-1/2 |
3-1/4 |
5-1/2FH |
7 (7-1/4, 7-1/2) |
3-1/4 |
6 |
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 |
4 |
6-5/8FH |
8 (8-1/4, 8-1/2) |
4 |
7-1/8 |
7 1/8 |
3 3/4 |
4-1/2 |
4-1/2 |
4 1/4 |
|||||
5 |
5 |
4 3/4 |
Steel Mark |
Chemical Composition% |
||||||||
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Cu |
Al |
|
4145H |
0.42~0.48 |
0.15~0.35 |
0.90~1.20 |
≤0.03 |
≤0.03 |
0.90~1.20 |
0.15~0.25 |
≤0.2 |
0.025~0.045 |
Other Elements:N≤0.015,Ni≤0.5 |
Application |
Material |
Size |
Yield Strength (Min KSI) |
Ultimate Strength (Min KSI) |
Hardness Brinell (HB) |
Elongation (A%) |
Min CHarpy (ft-lbs @+20°C) |
Integral Standard |
AISI 4145H Modified |
All |
110 |
140 |
285 to 340 |
13 |
40 |
Welded Standard |
AISI 1340 Modified |
All |
65 |
95 |
235 (max) |
18 |
30 |
Welded NS-1 |
AISI 4140H Modified |
All |
120 |
140 |
285 to 340 |
13 |
40 |
Welded Standard |
AISI 4140H Modified |
Above 7 1/4” |
120 |
140 |
285 to 340 |
13 |
40 |
Standard welded |
AISI 4140H Modified |
Up to 7 1/4” |
100 |
135 |
285 to 340 |
13 |
40 |
HWDP-110 HW MS |
ASCOWELL C |
Above 6 3/4” |
110 |
140 |
285 to 340 |
13 |
0 |
HWDP-110 HW MS |
ASCOWELL C |
Up to 6 3/4” |
100 |
135 |
285 to 340 |
13 |
55 |
HWDP-65 HW MS (tool joint) |
ASCOWELL C |
Above 6 3/4” |
110 |
140 |
285 to 340 |
13 |
55 |
HWDP-65 HW MS (tool joint) |
ASCOWELL C |
Up to 6 3/4” |
100 |
135 |
285 to 340 |
13 |
55 |
HWDP-65 HW MS |
AISI 1340 Modified |
All |
65 |
95 |
235 (max) |
18 |
30 |