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Oil Casing - API 5L-3PED Coated - Welded Steel Pipe
Oil Country Tubular Goods (OCTG) refers to a family of steel tubular products specifically designed for the exploration, drilling, completion, and production of oil and natural gas wells.Classification :
PRODUCT DETAILS
Oil Country Tubular Goods (OCTG) refers to a family of steel tubular products specifically designed for the exploration, drilling, completion, and production of oil and natural gas wells. OCTG products are manufactured to withstand high pressure, corrosive environments, and extreme downhole conditions, ensuring the safety and efficiency of oil and gas operations.
OCTG mainly includes Casing, Tubing, and Drill Pipe, each serving a unique function during the drilling and production process.
Main Types of OCTG
1. Casing
Casing is a large-diameter steel pipe installed in the wellbore to support the well walls, prevent formation collapse, isolate underground formations, and protect groundwater from contamination. It also provides structural integrity throughout the life of the well.
2. Tubing
Tubing is installed inside the casing and is used to transport crude oil, natural gas, or other production fluids from the reservoir to the surface. It is designed to withstand internal pressure, corrosion, and wear during long-term production.
3. Drill Pipe
Drill Pipe is a heavy-duty seamless steel pipe used to transmit drilling torque and drilling fluid from the drilling rig to the drill bit. It is an essential component of the drilling string and must possess high strength, fatigue resistance, and toughness.
Manufacturing Methods
OCTG products are generally manufactured using the following processes:
- Seamless Hot Rolling
- Cold Drawing
- Heat Treatment (Normalizing, Quenching & Tempering)
- Thread Machining
- Non-Destructive Testing (NDT)
- Surface Coating and Inspection
These manufacturing processes ensure high mechanical performance and reliable sealing capability.
Common API Grades
According to API Specification 5CT, common OCTG steel grades include:
Grade Typical Application H40 Shallow wells J55 General-purpose wells K55 Similar to J55 with improved properties N80 Medium-depth wells L80 Corrosive environments C90 Sour service wells T95 High-pressure sour service P110 Deep and high-pressure wells Q125 Ultra-deep and high-strength applications Common Standards
OCTG products are manufactured in accordance with internationally recognized standards, including:
- API Specification 5CT – Specification for Casing and Tubing
- API Specification 5DP – Specification for Drill Pipe
- ISO 11960 – Petroleum and Natural Gas Industries – Steel Pipes for Use as Casing or Tubing for Wells
- ISO 10424 – Drilling Equipment Standards
Applications
OCTG products are widely used in:
- Onshore oil fields
- Offshore drilling platforms
- Natural gas wells
- Shale gas development
- Geothermal wells
- Coalbed methane (CBM) projects
- Oil and gas transportation systems
Advantages
- High mechanical strength
- Excellent pressure resistance
- Outstanding corrosion resistance (depending on the grade)
- Reliable sealing performance
- Long service life
- Suitable for harsh downhole environments
- Manufactured to international API and ISO standards
Conclusion
Oil Country Tubular Goods (OCTG) are essential steel tubular products used throughout the oil and gas industry. Comprising Casing, Tubing, and Drill Pipe, OCTG products play a critical role in drilling, well completion, and hydrocarbon production. Manufactured in accordance with international standards such as API 5CT, API 5DP, and ISO 11960, OCTG products provide exceptional strength, durability, and reliability for demanding oil and gas operations worldwide.
CUSTOMER FEEDBACK
The company has established a rigorous quality management system, and all products have passed ISO 9001 international quality certification. It can also provide testing reports for multiple international standards such as API, ASTM, DIN, JIS, and GB. From raw material procurement and production supervision to outbound inspection, the entire process is traceable to ensure that every batch of products meets customer requirements.
PRODUCTION LINE
Steel Plate Production Line
Steel Bar Production Line
Steel Pipe Production Line
Steel Coil Production Line
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FAQ
What are the advantages of our products?
Good equipment and experience team, quality assurance, support customzation, sufficient inventory and timely delivery.
How long is your delivery time?
If goods are available, it is usually 5-10 days. Or if the goods are not in stock, within 30 days, calculate by quantity.
Are you a trading company or a manufacturer?
We have our own factory.
What is your terms of payment ?
Can be negotiated by both parties,If you have another question,pls feel free to contact us as below.RELATED PRODUCTS
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Equivalent grade
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DIN W. Nr. 2.4867
Equivalent grade
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DIN W. Nr. 2.4360, 2.4361
Equivalent grade
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Title ： Monel 401/N04401
Equivalent grade
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Equivalent grade
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Hastelloy：X,C-276,C-4,C-22,C-200
Incoloy：A286,25-6HN,27-7MMo,25-6Mo,20,28,330,800,800H, 825
Nickel：200,201,270
Equivalent grade
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DIN W. Nr. 2.4663A
Hastelloy：X,C-276,C-4,C-22,C-200
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Beijing Molong Petroleum Technology Co., Ltd. is a professional supplier specializing in the export of steel products, committed to providing global customers with high-quality steel products and one-stop supply chain solutions.
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