What Is Oilfield Pipe?
Oilfield pipe—also known as OCTG (Oil Country Tubular Goods)—includes casing, tubing, drill pipe, line pipe, and coiled tubing. Built to rigorous standards (API 5CT, 5L, 5DP, ASTM), it supports drilling, production, and transport of oil & gas
Product Types & Key Specs
| Pipe Type | Size Range | Main Use |
|---|---|---|
| Casing | Ø 4½–20″, wall 0.205–0.875″ | Stabilizes wellbore; prevents collapse |
| Tubing | Ø 1.05–4½″, wall 0.113–0.797″ | Transports oil/gas to surface |
| Drill Pipe | Ø 2⅜–6⅝″, 27–32 ft length, thick-walled | Connects drill bit; withstands torque & pressure |
| Line Pipe | Ø 2–48″, wall 0.065–0.5″ | Long-distance pipelines (on/offshore) |
| Coiled Tubing | Ø 1–3″ (coiled, continuous) | Well interventions; pumping chemicals |
Standards & threading
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API 5CT: Casing & tubing (grades J55, K55, N80, L80, P110)
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API 5L: Line pipe (grades B–X80)
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API 5DP: Drill pipe
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Thread types: STC, LTC, BTC, EUE, NUE, premium (strong seal)
Advantages
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High strength & durability: Built for high-pressure, torque, and extreme environments
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Corrosion-resistant: Can be coated/stainless for sour or marine conditions
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Cost-effective: Reconditioned pipes usable, economical
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Multiple connection & weld options: ERW, seamless, premium threads for secure joints
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Wide sizing options: Customizable diameters, wall thickness & grades to suit various well conditions
Typical Applications
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Casing: Well support, fluid isolation, contamination prevention
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Tubing: Extracts oil/gas to surface, installed inside casing
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Drilling: Drill string delivers torque, pressure to bit; heavy-duty steel for depth
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Line Pipe: Onshore/offshore pipelines—transport, gathering, distribution
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Coiled Tubing: Well interventions, chemical injection, logging
Why Choose Oilfield Pipe?
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Enhanced well integrity & safety – casing/tubing keep wells secure and isolated
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Efficient drilling & production – durable drill pipes and tubing improve operations
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Reliable transport – line pipe brings oil & gas safely over long distances
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Service flexibility – coiled tubing enables rapid, continuous operations
Summary
Oilfield pipes are essential to every stage of oil & gas operations. They’re specially engineered for strength, corrosion resistance, and fit-for-purpose use—from drilling and casing to production, transport, and servicing. Available in a wide range of sizes, connection types, and steel grades, they ensure safe, efficient, and cost-effective field operations.
Need details on material grades (like P110), premium thread specs, or coating options? I’d be happy to help!
Luo Kaiwei Steel Company is a multi-ISO certified steel manufacturer specializing in carbon steel plates, pipes and galvanized coils since 2010. Competitive prices and ASTM/JIS compliant. Get instant quotes for bulk orders and global shipping support.