Oil Country Tubular Goods

Oil Country Tubular Goods

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Supplier Details

Yosin Steel Pipe Co., ltd.

Free Member  (2013)

[ Shanghai, SG, China ]

Business Type:  Manufacturer, Wholesaler, Trading Company

Supplier has 50 products

Contact Details

Quick Details


Packaging and Delivery

Delivery Lead Time:
within 30 days

Product Description

Oil Country Tubular Goods (OCTG)
casing, Casing pipe, drill pipe, OCTG, pipe lines, Seamless pipe, Seamless tube, Tubing

Oil country tubular goods (OCTG) is a family of seamless rolled products consisting of drill pipe, casing and tubing subjected to loading conditions according to their specific application. (see Figure 1 for schematic of a deep well):

Drill pipe is heavy seamless tube that rotates the drill bit and circulates drilling fluid. Pipe segments 30 ft (9m) long are coupled with tool joints. Drill pipe is simultaneously subjected to high torque by drilling, axial tension by its dead weight, and internal pressure by purging of drilling fluid. Additionally, alternating bending loads due to non-vertical or deflected drilling may be superimposed on these basic loading patterns.
Casing pipe lines the borehole. It is subject to axial tension by its dead weight, internal pressure by fluid purging, and external pressure by surrounding rock formations. Casing is particularly exposed to axial tension and internal pressure by the pumped oil or gas emulsion.
Tubing is pipe through which the oil or gas is transported from the wellbore. Tubing segments are generally around 30 ft [9 m] long with a threaded connection on each end.
Typical OCTG manufacturing processes include (all dimensional ranges are approximate)

Continuous mandrel-rolling process and the push bench process for sizes between 21 and 178 mm OD.
Plug mill rolling for sizes between 140 and 406 mm OD.
Cross-roll piercing and pilger rolling for sizes between 250 and 660 mm OD.
These processes typically do not allow the thermomechanical processing customary for the strip and plate products used for welded pipe. Therefore, high-strength seamless pipe must be produced by increasing the alloying content in combination with a suitable heat treatment such as quench & tempering.

Meeting the fundamental requirement of a fully martensitic microstructure even at large pipe wall thickness requires good hardenability. Cr and Mn are the main alloying elements used to produce good hardenability in conventional heat-treatable steel. However, the requirement for good sulphide stress cracking (SSC) resistance limits their use. Mn tends to segregate during continuous casting and can form large MnS inclusions that reduce hydrogen induced cracking (HIC) resistance. Higher levels of Cr can lead to formation of Cr7C3 precipitates with coarse plate-shaped morphology, which act as hydrogen collectors and crack initiators. Alloying with Molybdenum can overcome the limitations of Mn and Cr alloying. Mo is a much stronger hardener than Mn and Cr, so it can easily recover the effect of a reduced amount of these elements.

Basic Information

Business Type:
Manufacturer, Wholesaler, Trading Company
Year Established:
Total Employees:
11 - 50

About Us

Yosin Steel. is a leading distributor of various steel pipe, which focuses

on export and service of seamless pipes, alloy steel tubing, and pipe


Through years of development by focusing on customers' specific needs on

applied in petroleum, chemical, power, boiler, and machinery industries

abiding to the requirement and specifications. Yosin Steel gained a good

fame among buyers and laid firm foundation for further growth. To meet and

provide flexible, customized products, Yosin Steel established joint plant

and partner mills located at Jiangsu province, where it focuses on

manufacturing seamless pipes and tubes. The steel pipes are produced

according to international advanced standard such as API, ASTM(ASME), DIN

and JIS etc.

Yosin Steel have a strong, experienced and expertise sales team. We are not

only being able to export steel pipes and fittings to our customers with

the best quality and competitive prices, but also provides global service

of Steel Tube&Pipe solution.

To grantee excellent quality, Yosin Steel participates in and supervises

each step from raw material purchasing , processing, quality checking and

packing , making sure all efforts result in good quality products. The

following products within Yosin Steel supplying capacity is: seamless

pipes, seamless tubes, alloy steel tubing for mechanical industry, pipe

fittings for connection. All the products can be made exactly as per

buyer's requirement or your order, customized products and service to

satisfy your development .

We sincerely hope to establish long-term cooperation relationship with you

on the basis of mutual benefit, reciprocity and common development!

Yosin Steel have a strong, experienced and expertise sales team. We are not

only being able to export steel pipes and fittings to our customers with

the best quality and competitive prices, but also provides global service

of Steel Tube&Pipe solution.

For further information or a quote from Yosinsteel please contact us by

fax, email, or using our contact form.

We will get back to you as soon as possible.

Member History

Year Joined:
Membership Type:
Free Member

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