A composite pipe material in which a corrosion-resistant alloy layer (e.g., stainless steel/nickel-based alloy) is embedded within the inner wall of carbon steel pipe. It combines the high strength of carbon steel with the excellent corrosion resistance of the alloy, achieving molecular-level bonding between the two metal layers through specialized manufacturing processes.
Product Specifications: 2-7/8″ to 3-1/2″
Steel grade: N80, L80
The metal-lined tubing (bimetallic composite) represents the ultimate internal corrosion protection solution for high-corrosion, high-temperature, and deep-well applications. Its performance and reliability significantly surpass those of PNE-coated tubing, with notable advantages in service life, high-temperature resistance, anti-dropping properties, and thread corrosion protection, while offering even better lifecycle costs under extreme operating conditions.
Carbon steel or low-alloy steel grades such as J55, N80, and P110, offering high strength, excellent pressure resistance, and resistance to external extrusion, compliant with the API 5CT standard.
Made of 316L stainless steel, 2205 duplex steel, nickel-based alloys (Inconel 625), titanium alloys, etc., with a thickness typically ranging from 0.5 to 3 mm, providing corrosion resistance, wear resistance, and high-temperature performance.
Metallurgical bonding (press-fused anchoring, hot extrusion, overlay welding), with a bonding strength ≥210 MPa and a bonding rate of 100%, ensuring permanent adhesion that significantly outperforms mechanical linings and coatings.
Effectively resists erosion from H₂S, CO₂, and Cl⁻ ions, significantly extending service life.
The main tube is constructed from high-strength carbon steel, ensuring excellent mechanical properties and resistance to extrusion damage.
The composite interface exhibits robust adhesion, eliminating the risk of lining detachment and making it suitable for extreme operating conditions.
Reduce the frequency of well maintenance operations, saving substantial maintenance costs and production downtime losses.
Prevent wall thinning, perforation, leakage, and production shutdowns caused by corrosion, significantly reducing safety risks and environmental hazards.
Reduce the frequency of pipe cleaning, hot washing, and chemical dosing to lower operational costs and ensure long-term stable transportation efficiency.
Extending the pump inspection interval, reducing the number of operations, lowering maintenance and material costs, and enhancing overall economic efficiency.
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