| Model: | NC23-31 |
|---|---|
| Brand: | WEI GAO |
| Origin: | Made In China |
| Category: | Metallurgy , Mining & Energy / Energy / Petroleum |
| Label: | Spiral Drill Collar , drill collar , drill pipe |
| Price: |
¥1000
/ pc
|
| Min. Order: | 1 pc |
| Last Online:13 Oct, 2015 |
The drill collar is mainly used to provide bit weight to drill bit so that drill pipe is in tension.
The drill collar is mainly used to provide bit weight to drill bit so that drill pipe is in tension. Especially drill collar can keep drill bit centralized and hole track by large rigidity. WEIGAO brand drill collar are manufactured strictly from API Spec.7 and SY5144 standard.
Technical specification and parameters
|
O.D. |
Cutting depth |
Lead±25.4 |
||
|
Mm |
in |
A(mm) |
B(mm) |
mm |
|
86 |
3 3/8 |
3.5±0.79 |
|
679 |
|
98.4 |
3 7/8 |
4.0±0.79 |
|
914 |
|
101.6~111.1 |
4~4 1/8 |
4.8±0.79 |
|
914 |
|
114.3~130.2 |
4 1/2~5 1/8 |
5.6±0.79 |
|
965 |
|
133.4~146.1 |
5 1/4~5 3/4 |
6.4±0.79 |
|
1067 |
|
149.2~161.9 |
5 7/8~6 3/8 |
7.1±1.59 |
|
1067 |
|
165.1~177.8 |
6 1/2~7 |
7.9±1.59 |
|
1168 |
|
181.0~200.0 |
7 1/8~7 7/8 |
8.7±1.59 |
5.6±0.79 |
1626 |
|
203.2~225.4 |
8~8 7/8 |
9.5±1.59 |
6.4±0.79 |
1727 |
|
228.6~250.8 |
9~9 7/8 |
10.3±2.37 |
7.1±1.59 |
1829 |
|
254.0~276.2 |
10~10 7/8 |
11.1±2.37 |
7.9±1.59 |
1930 |
|
279.4 |
11 |
11.9±2.37 |
8.7±1.59 |
2032 |
