Drill Collar
Subclassification:
Oil country tubular goods
Key words:
Oil country tubular goods
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Product Details
API SPEC 7-1 drill collar is made with rolling or forging AISI4145H chromium molybdenum alloy steel. Therefore, it needs to control chemical composition and the content of trace elements effectively.
Specification
|
Standard |
Number |
OD |
ID |
Length |
Weight |
Typical Bending |
|
SY5144-2007/API7-1 |
NC 23-31 |
3-1/8 |
1-1/4 |
30 |
22 |
2.57:1 |
|
NC 26-35 (2-3/8 IF) |
3-1/2 |
1-1/2 |
30 |
27 |
2.42:1 |
|
|
NC 31-41 (2-7/8 IF) |
4-1/8 |
2 |
30 or 31 |
34 |
2.43:1 |
|
|
NC 35-47 |
4-3 /4 |
2 |
30 or 31 |
47 |
2.58:1 |
|
|
NC 38-50 (3-1/2 IF) |
5 |
2-1/4 |
30 or 31 |
54 |
2.38:1 |
|
|
NC 44-60 |
6 |
2-1/4 |
30 or 31 |
83 |
|

Warehouse Storage
With the fundamental purpose of "sincerity, trust and win-win", the company adheres to the development strategy of revitalizing the enterprise through science and technology, abides by business rules, innovates and forge ahead, has won the reputation, won the market and been recognized by all levels of society. The company's products include spiral steel pipe, seamless steel pipe, straight seam steel pipe, anti-corrosion and thermal insulation steel pipe and various plates and profiles.

Packing and shipping
We can provide one-stop service and are very willing to package and ship products according to the weight, specifications, materials, economic costs and customer requirements.

Application field
The products are widely used in many industries such as electric power, chemical industry, pharmacy, oil refining, natural gas, shipbuilding, metallurgy, mining, heating, water treatment, environmental protection and so on.

Custom Visiting
FAQ
Q1:Can you send samples?
A:Of course, we can provide customers with free samples and express shipping service to all over of the world.
Q2:What product information do I need to provide?
A:Please kindly provide the grade, width, thickness, surface treatment requirement should you have and quantities you need to purchase.
Q3:It's my first time to import steel products, can you help me with it?
A:Sure,we have agent to arrange the shipment, we will do it together with you.
Q4:What about product prices information?
A:Prices various according to periodic price changes of raw materials.
Q5:What ports of shipment are there?
A:Under normal circumstances, we ship from Shanghai, Tianjin, Qingdao, Ningbo ports, you can specify other ports according to your needs.
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