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.

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 shape
B. 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 factor
B. Good adhesion and flexility
C. High application temperature and pressure
D. High hardness and impact resistance
E. Good corrosion resistance

Outside Diameter,
in.

Inside Diameter,
in.

Connection

Tool Joint OD ,
in.

Tool Joint ID ,
in.

Center Upset
Diameter, in.

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
& NS-1

AISI 4145H Modified

All

110

140

285 to 340

13

40

Welded Standard
(central part)

AISI 1340 Modified

All

65

95

235 (max)

18

30

Welded NS-1
(central part)

AISI 4140H Modified

All

120

140

285 to 340

13

40

Welded Standard
& NS-1 (tool joint)

AISI 4140H Modified

Above 7 1/4”

120

140

285 to 340

13

40

Standard welded
& NS-1 (tool joint)

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
(central part)

AISI 1340 Modified

All

65

95

235 (max)

18

30

Process

The manufacturing process of heavy-weight drill pipe involves several steps, including the creation of heavy-wall tubes, the formation of the center wear pad, and the production of long tool joints. This process ensures the durability and strength of the HWDP, allowing it to withstand the stresses and pressures encountered during drilling operations.

Packing

  • Iron frame packing

    Iron frame packing

We use cookies and other tracking technologies to improve your browsing experience on our website, to show you personalized content and targeted ads, to analyze our website traffic, and to understand where our visitors are coming from,This behavior is in compliance with the user consent policy.