ABOUT US

The company meets the needs of customers with quality products and excellent services. Warmly welcome Chinese and foreign

businessmen to visit us.

Phone:19905158858

Fax:86 - 515 – 86582386
E-mail:sale@chinateda.com
Add:Hengji Town, Jianhu County, Yancheng City, Jiangsu Province

Copyright © Yancheng Teda Driling And Production Equipment Co.,Ltd.

Drill collar

The drill collar can provide bit with drilling pressure and control deviation during drilling operation. Teda drill collar is the own brand of Teda Special Pipe Fittings Co., Ltd. and is favored by drilling contractors in the oil field industry. The service life of the product varies from one well to many wells according to the different pressure loads during the actual operation.

Technological characteristics:

The diameter of the drill collar for Teda special fittings ranges from 31/8"-14"

Before boring, heat treatment is the most important process in the production of drill collar.

Precision boring instrument can ensure strict straightness and minimum center position difference of material when boring.

The two ends are machined by NC machine tools, and the same cutting tool head is used.

Cold rolling of the threads can improve the fatigue strength of the ports.

Phosphating treatment prevents sticking.

 

Parameter list:

external diameter

Thread

Inner hole
+1.6 -0.0

length
+152.44 mm

weight
Standard hole kg

in

standard

Alternative

slick assembly

Spiral drill collar

3 1/8

NC23 or 2 3/8" REG

1 1/4

1

9.14

333

n/a

3 1/2

NC26 or 2 3/8" IF

1 1/2

1 1/4

9.14

428

n/a

4 1/8

NC31 or 2 7/8" IF

2

1 3/4

9.14 or 9.45

490

457

4 1/4

NC31 or 2 7/8" IF

2

1 3/4

9.14 or 9.45

530

493

4 1/2

NC31 or 2 7/8" IF

2

1 3/4

9.14 or 9.45

614

572

4 3/4

NC35 or NC 38 3 1/2" IF

2 1/4

2

9.14 or 9.45

703

654

5

NC38 or 3 1/2" IF

2 1/4

2

9.14 or 9.45

754

702

5 1/4

NC38 or 3 1/2" IF

2 1/4

2

9.14 or 9.45

852

793

5 1/2

NC38 or 3 1/2" IF

2 1/4

2

9.14 or 9.45

952

886

5 3/4

NC40 4" FH or 4 1/2" FH

2 1/4

2 13/16

9.14 or 9.45

1058

985

6

NC44 or NC 40 4" FH

2 1/4

2 13/16

9.14 or 9.45

1168

1088

6 1/4

NC46 4" IF

2 1/4

2 13/16

9.14 or 9.45

1280

1192

6 1/2

NC46 4" IF or 4 1/2" IF

2 1/4

2 13/16

9.14 or 9.45

1407

1310

6 3/4

NC46 4" IF or 4 1/2" IF

2 1/4

2 13/16

9.14 or 9.45

1535

1429

7

NC50 or 4 1/2" IF

2 13/16

2 1/4

9.14 or 9.45

1662

1545

7 1/4

NC50 4 1/2" IF or 5 1/2" FH

2 13/16

3

9.14 or 9.45

1684

1567

7 1/2

NC50 4 1/2" IF or 5 1/2" REG

2 13/16

3

9.14 or 9.45

1824

1697

7 3/4

NC56 or 6 5/8"REG

2 13/16

3

9.14 or 9.45

1967

1830

8

NC56 or 6 5/8"REG

2 13/16

3

9.14 or 9.45

2118

1970

8 1/4

6 5/8 REG

2 13/16

3

9.14 or 9.45

2268

2110

8 1/2

6 5/8 REG

2 13/16

3

9.14 or 9.45

2428

2258

8 3/4

6 5/8 REG

2 13/16

3

9.14 or 9.45

2591

2421

9

NC61 or 7 5/8"REG

3

2 13/16

9.14 or 9.45

2715

2525

9 1/4

NC61 or 7 5/8"REG

3

2 13/16

9.14 or 9.45

2888

2699

9 1/2

7 5/8" REG

3

2 13/16

9.14 or 9.45

3068

2854

9 3/4

NC70 or 7 5/8"REG

3

2 13/16

9.14 or 9.45

3252

3026

10

NC70 or 7 5/8"REG

3

2 13/16

9.14 or 9.45

3436

3196

11

NC77 or 8 5/8 REG

3

2 13/16

9.14 or 9.45

4227

3933

11 1/4

NC77 or 8 5/8 REG

3

2 13/16

9.14 or 9.45

4440

4130

12

NC77 or 8 5/8 REG

3

2 13/16

9.14 or 9.45

5078

4745

14

NC77 or 8 5/8 REG

3

2 13/16

9.14 or 9.45

6853

6404