Specifications: diameter: 320 to 127 mm thickness: 0.4 to 12.7 mm Length: 6 m above, and, in accordance with customer demand, supply and other specifications of steel pipe

API Weight Drill Pipe 3-1/2"-6-5/8"


API Weight Drill Pipe 3-1/2"-6-5/8"

1. api drill pipe

1.OD.: 21.3mm-609mm WT.: 2mm-22mm 2.Material:H-40,J-55,K-55,N-80,C-75,L-80,C-90,C-95,P-110,Q-125

The wall thickness of heavy weight drill pipe is between drill pipe and drill collar,its structure is simliar with drill pipe.It is made from premium alloyed steel.Its both tool joints and middle upset are welded hardbands.Technical parameters meet with API Spec7-1 Standard.+

 

Thechnical specifications and parameters..

Size

Tube OD 
(+1/16,-1/32)

Tube OD 1

Tool Joint OD
(+1/16,-1/32)2

Tool Joint OD
(+1/8,-0)

Connection

Max Elevator Upset Dia

Center Upset Dia
(+1/16,-1/32)

Min Drift Dia3

 

 

 

 

 

 

Deu

Dcu

 

3 1/2

3 1/2

2 1/4

4 3/4
(4 7/8,5)

2 1/4

NC 38

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

NC 40

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

NC 46

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

NC 50

5 1/8

5 1/2

2 3/4

5 1/2

5 1/2

3 1/4

7
(7 1/4,7 1/2)

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 5/83/4

4

4

3 3/4

6 5/8

6 5/8

4

8
(8 1/4,8 1/2)

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

1.Maximum tube ID is 1/8 larger than nominal.Minimum tube ID is controlled by the drift requirement. 
2.Optional Tool Joint ODs shown in parenthesis,to be agreed between purchaser and manufacturer. 
3.Drift Diameter is based on ID tolerances of heavy wall pierced tube used for the center section...

 

Standard

API 5CT,SY/T6194-96

Size

OD:21.3-609MM WT:2-22MM Length:6-12m

Material

H-40,J-55,K-55,N-80,C-75,L-80,C-90,C-95,P-110,Q-125

Thread type

LTC (long round thread casing connection) STC (short round thread casing connection) BTC(buttress thread)

 

Length

R-1:4.88~7.62m

R-2:7.62~10.36m

R-3:more than 10.36m

 

Application

Used in oil well drilling.It is mainly used for drilling process and after

completion of borehole wall support, to ensure that the drilling process

and the whole Wells after completion are normal running .

 

QB series Rod parameter-geological steel pipe-entire length thermal treatment, NC lathe with former cutters
Spec. Unit BQB NQB HQB PQB
OD/ID mm 55.6/46 71/60 89/77.8 114.3/101.6
Thickness mm 4.8 5.5 5.6 6.35
Length m 1.5 or 3 1.5 or 3 1.5 or 3 1.5 or 3
Weight kg/m 6.01 8.8 11.51 17.3
thread length mm 44.45 44.45 44.45 63.5
thread pitch thread/inch 3 3 3 2.5
box thread tooth height mm 0.76 0.76 0.76 1.17
pin thread tooth height mm 0.88 0.88 0.88 1.27
thread tooth angle . 29 29 29 29
tensile resistance(A series) kn 400 530 510 565
tensile resistance(B series) kn 450 615 625 660
bore depth m 1200 1000 900 800
           
RQ series Rod parameter-geological steel pipe-entire length thermal treatment, NC lathe with former cutters
Spec. Unit BRQ NRQ HRQ PRQ
OD/ID mm 55.6/46 69.9/60.3 88.9/77.8 114.3/101.6
Length m 1.5 or 3 1.5 or 3 1.5 or 3 1.5 or 3
Weight kg/m 6.01 8.8 11.51 17.3
thread length mm 42 42 41.91 63.5
thread pitch thread/inch 3 3 3 2.5
box thread tooth height mm 0.76 0.76 0.76 1.17
pin thread tooth height mm 0.88 0.88 0.88 1.27
thread tooth negative angle . 5 5 5 5
tensile resistance(A) kn 450 525 545 565
tensile resistance(B) kn 530 625.5 602 660
bore depth m      

 

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