We are committed to providing one-stop service for steel pipe products to customers around the world.
We are committed to providing one-stop service for steel pipe products to customers around the world.
A Heavy Weight Drill Pipe (HWDP) looks like a normal drill pipe except for an upset centered along the tube which helps to prevent excessive buckling.
HWDP is used as a transitional stiffness section, typically between the stiff and rigid drill collars and the relatively light and flexible drill pipe joints to reduce fatigue failures directly above the bottom hole assembly.
Its wall thickness is up to 3 times that of a similar-sized normal drill pipe to add additional weight to the bit.
HWDP is used most commonly in directional drilling because it bends more easily and helps to control torque and fatigue in high-angle operations.
HWDP is manufactured in accordance with API Spec. 7/7-1 guidelines.
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
Standard 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 |
2 1/4 |
NC38 |
3 7/8 |
4 |
2 |
|
2 1/16 |
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 |
3 1/4 |
5 1/2 FH |
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 |
4 |
6 5/8 FH |
6 15/16 |
7 1/8 |
3 3/4 |
|
4 1/2 |
4 1/2 |
4 1/4 |
||||||
|
5 |
5 |
4 3/4 |
|
Spiral heavy weight drill pipe |
||||||||
|
Specification mm |
Tube |
Joint |
||||||
|
ID mm |
Elevator upsetmm |
elevator groove |
Screw in diametermm |
Spiral groove depthmm |
Thread Type |
OD mm |
ID mm |
|
|
88.9(3 1/2) |
54 |
92.1 |
88.9 |
101.6 |
9.5 |
NC38 |
120.6 |
54 |
|
114.3(4 1/2) |
69.8 |
117.5 |
114.3 |
127 |
12.7 |
NC46 |
158.8 |
69.8 |
|
127.0(5) |
76.2 |
130.2 |
127 |
139.7 |
12.7 |
NC50 |
165.1 |
76.2 |
OCTL Heavy Weight Drill Pipe is manufactured in compliance with API 7-1 and in API RP7G.
English
Español
