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Drill Pipe

Pipe Type:Seamless (SMLS), Electric Resistance Welded (ERW)
Application:Casing serves as well sidewall
Tubing is used for extracting petroleum and natural gas from well;
Casing serves as wells of a well.
Specification: OD:60.3mm, 73mm, 88.9mm, 101.6mm, 114.3mm, 127mm, 139.7mm
WT:6.5mm to 12.7mm, or cutomized
LENGTH: R1, R2, R3
Standard:API、SPEC、5DP,D355,K55,P110,5CT,5DP,G105,J55,S355J2H
Grade:E75、X95、G105、S135 、X42,X52,X56,X60,X65,X70,PSL1,PSL2,API5L.GRA,B,C
Ends: Beveled, Square Cut
Surface:Anti-corrosion Water Based Paint
Packing:Protection Caps in Both Ends, Waterproof Paper Wrapped, Two Tags

API and ISO are the standards followed by the oil and gas industry with regards to OCTG Casing and Tubing products. The Industry standards for OCTG casing and tubing are:

  • Specification for Casing and Tubing is API 5CT

  • Specification for Drill Pipe is API 5DP

  • Steel pipes can be used as casing and tubing for petroleum and natural gas industries wells.

These industry standards define the method of manufacturing OCTG, the type and length for the joints used, the thickness of the walls, their weight, steel grade quality, chemical properties, tensile properties, etc.

Standard: API SPEC 5DP

Steel Grade: E75、X95、G105、S135  

OD Range : 60.3mm, 73mm, 88.9mm, 101.6mm, 114.3mm, 127mm, 139.7mm

Range of Thickness: 6.5mm to 12.7mm, or cutomized
Connection threads: NC26, NC31, NC38, NC40, NC46, NC50, 5 1/2FH.6 5/8FH.
Internal Upset: IU, EU, IEU
Length: R1, R2, R3


Sizes

D


normal weight


steel grade

 t


upset ends


tool joint designation

in

mm

in

mm

2 3/8

60.32

6.65

E,X,G

0.280

7.11

EU

NC26

2 7/8

73.02

10.40

E,X,G,S

0.362

9.19

EU

NC31

3 1/2

88.90

9.50

E

0.254

6.45

EU

NC38

13.30

E,X,G,S

0.368

9.35

EU

NC38

13.50

E,X,G

0.449

11.40

EU

NC38

S

0.449

11.40

EU

NC40

4

101.60

14.00

E,X,G,S

0.330

8.38

IU

NC40

E,X,G,S

0.330

8.38

EU

NC46

4 1/2

114.30

13.75

E

0.271

6.88

IU

NC46

13.75

E

0.271

6.88

EU

NC46

16.60

E,X,G,S

0.337

8..56

EU

NC50

20.00

E,X,G,S

0.430

10.92

EU

NC50

16.60

E,X,G,S

0.337

8.56

IEU

NC46

20.00

E,X,G,S

0.430

10.92

IEU

NC46

5

127.00

19.50

E,X,G,S

0.362

9.19

IEU

NC50

19.50

E,X,G,S

0.362

9.19

IEU

5 1/2 FH

25.60

E,X,G

0.500

12.70

IEU

NC50

25.60

E,X,G,S

0.500

12.70

IEU

5 1/2 FH

5 1/2

139.70

21.90

E,X,G,S

0.361

9.17

IEU

5 1/2 FH

24.70

E,X,G,S

0.415

10.54

IEU

5 1/2 FH

6 5/8

168.28

25.20

E,X,G,S

0.330

8.38

IEU

6 5/8 FH

27.70

E,X,G,S

0.362

9.19

IEU

6 5/8 FH

Note: EU— external upset; IU— internal upset; IEU—internal & external upset.

 


Dimension Tolerances


 Tolerance

D

Drill-pipe-body Outside Diameter

          Pipe body


D≤101.60mm±0.79mm

D≥114.30mm+1.0%, -0.5%D


Drill-pipe-body behind the Meu

D≥60.32~≤88.90mm+2.38%, -0.79%D

D>88.90~≤127.00mm+2.78mm, -0.75%D

D>127.00~≤168.28mm+3.18mm,-0.75%D

     Wall Thickness

0, -12.5%t

 

 

 


Chemical Composition, Mass Fraction(%)



steel grade

P (%)

S (%)


Pipe body

E

0.030

0.020

X, G, S

0.020

0.015

Tool Joint

0.020

0.015

 

Mechanical Properties


steel grade

 tensile properties

 (21℃±3℃)

Charpy V-notch longitudinal absorbed-energy (21℃±3℃)


yield strength (Mpa)


tensile strength

(Mpa)


elongation(%)

10*10


average(min)

10*7.5

average(min)

10*5

average(min)

min

max

min

E

517

724

689

 

54(47)

43(38)

30(26)

X

655

862

724

G

724

931

793

S

931

1138

1000

Remarks: k—constant, equal to 1944 (62500); A—cross-sectional area of tensile specimen, mm2(in2); Udp—specified minimum tensile strength, MPa(Ib/in2)


Completed-Drill-Pipe-Unit

DRILL PIPE

Drill pipe is heavy, seamless pipe which provide rotation for circulating the drilling fluid. The pipe helps the drilling fluid to be pumped back up the annulus. The annulus of an oil well is the space between the casing and the piping or any immediate space between any casing and tubing surrounding it. The Annulus helps in the easy circulation of the fluid in the well. The pipe is subject to axial tension as high torque is required for rotating the down-hole assembly and drilling the fluid and circulating it. All this creates a large amount of stress on the drill pipe; hence the OCTG pipe should be extremely strong.
These drill pipe is used only at the drilling rigs and they are available in different sizes and different qualities. The quality differs based on the grade of strength, weight and length of the pipe. The OCTG Drill Pipe is sturdy steel pipe which is required to meet the standards of API 5DP and API SPEC 7-1.

Application: Drill pipe is for exploration and development of oil and gas wells.

 

 


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