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 |
length |
weight |
||
|
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 |