oilfield drill pipe

Specification

Nominal weight

Flat end weight

Outer diameter O.D.

Wall thickness

Steel grade

Upset end for weld-on drill pipe joint

lb/ft

kg/m

in

mm

in

（Ton）mm

2 3/8

E, X, G, S

EU

2 7/8

73

E, X, G, S

IU/EU

3 1/2

E

IU/EU

3 1/2

E, X, G, S

IU/EU

3 1/2

E

IU/EU

3 1/2

X, G, S

IU/EU

4

14

4

E, X, G, S

IU/EU

4 1/2

E

IU/EU

4 1/2

15

E, X, G, S

EU/IEU

4 1/2

20

E, X, G, S

EU/IEU

5

5

127

X, G, S

IU

5

5

127

E

IEU

5

5

127

X, G, S

EU/IEU

5

5

127

E

IEU

5

5

127

X, G, S

EU/IEU

5 1/2

E, X, G, S

IEU

5 1/2

E, X, G, S

IEU

6 5/8

E, X, G, S

IEU

6 5/8

E, X, G, S

IEU

Mechanical Property of Friction Welding Zone

Yield Strength

Tensile Strength

Elongation

Guided Bend

Impact Energy（Akv）

HRC

Item

MPa

MPa

%

J

Standard

Steel Grade

Tensile Test Piece：￠12.5； Impact specimen：10×10 Charpy -V、20℃

SY/T5561-92 Welding area Regulations

E-75

≥517

≥689

≥13

/

Average≥20Mini. value≥15

/

X-95

≥609

≥712

/

/

G-105

≥655

≥724

/

/

S-135

≥724

≥793

/

/

API Welding area Regulations

E-75

≥609

≥712

Bending plane cracks in any direction≤3.175mm

Average≥27Mini. value≥23

HAZ内HRC≤37

X-95

≥655

≥724

G-105

≥724

≥793

S-135

≥392778793

≥4211000

API Pipe Body Regulations

E-75

≥517≤724

≥689

/

Average≥54Mini. value≥47

/

X-95

≥655≤862

≥724

G-105

≥724≤931

≥793

S-135

≥931≤1138

≥1000

Welding Drill Pipe Parameters list (According to API standard)

Wall Thickness

Pipe Body Upsetting

Grade

Drill Pipe Length（m）

Joint O.D.

Thread Type

Weight

inch

mm

inch

mm

Range1

Range2

Range3

kg/m

2-3/8

EU

X、G

NC26

2-7/8

EU

X、G

NC31

2-7/8

EU

S

NC31

3-1/2

EU

G

NC38

3-1/2

EU

S

NC38

3-1/2

EU

G

NC38

3-1/2

EU

S

NC40

4

IU

G

NC40

4

IU

S

NC40

4

EU

X、G

NC46

4

EU

S

NC46

4-1/2

EU

X、G

NC50

4-1/2

EU

S

NC50

4-1/2

EU

X、G

NC50

4-1/2

EU

S

NC50

4-1/2

IEU

X、G

NC46

4-1/2

IEU

S

NC46

4-1/2

IEU

G

NC46

4-1/2

IEU

S

NC46

5

IEU

G

NC50

5

IEU

S

NC50

5

IEU

X、G

5 1/2FH

5

IEU

S

5 1/2FH

5

IEU

G

NC50

5

IEU

G

5 1/2FH

5

IEU

S

5 1/2FH

5-1/2

IEU

G

5 1/2FH

5-1/2

IEU

S

5 1/2FH

5-1/2

IEU

X、G

5 1/2FH

5-1/2

IEU

S

5 1/2FH

Note: 1. The IU EU IEU is internal upset,external upset and internal-external upset. 2.The thread has a right-handed left rotation and copper plating or phosphating 3. This table is used for steel drill pipe, and lower steel grade drill pipe can also be supplied