Heavy Weight Drill Pipe.

We supply HWDP in R 2 and R 3. Our HWDP are made out of one piece (mono block) with no welding zone. 

HWDP offers the high penetration rates and stability of drill collars.

HWDP is more flexible than drill collars and has a greater resistance to fatigue failure than drill pipe.

HWDP is normally placed between drill collars and the drill string as transition pipe and weight on bit.

 

HWDP should be used in any transition zone, highly deviated wells, instances in which drill pipe would be subject to drilling compression.

Large quantities of HWDP are also used as weight for pushing down liners and screens. 

Our HWDP are made out of one piece (mono block) with no welding zone. 

    

Nominal Size
in 

Total Length
ft

Pipe Body

Tool Joint

Weight

ID in 

WT
in 

Area in2

Center Pad OD
in 

Center Pad Length
in

Elevator Upset
in 

Thread Type & Size

OD
in

ID
in

Pin & Box Length
in (mm)

lb/ft

3-1/2
 

31
 

2-1/4
 

0.625
 

5.625
 

4
 

24
 

3-5/8
 

NC38

4-3/4
 

2-1/4
 

25/23
 

23.2
 

4
 

31
 

2-1/4
 

0.625
 

6.627
 

4-1/2
 

24
 

4-1/8
 

NC40

5-1/4
 

2-1/4
 

25/23
 

27.2.0
 

4-1/2
 

31
 

2-1/4
 

0.875
 

9.965
 

5
 

24
 

4-5/8
 

NC46

6-1/4
 

2-1/4
 

25/23
 

41.0
 

5
 

31
 

3
 

1.000
 

12.566
 

5-1/2
 

24
 

5-1/8
 

NC50

6-3/4
 

3

25/23
 

49.7
 

5-1/2
 

31
 

3-1/2
 

1.063
 

14.812
 

6
 

24
 

5-11/16
 

5-1/2 FH

7
 

3-1/2
 

25/23
 

57.0
 

6-5/8
 

31
 

4-1/2
 

1.063
 

18.567
 

7-1/8
 

24
 

6-3/4
 

6-5/8 FH

8
 

4-1/2
 

25/23
 

70.8
 

 



Dahl Oilfield Services AS / Hammaren 9A, 4056 Tananger / tlf:+4751419000 / post@dahl-os.no