Oilfield API 5CT Crossover Sub, Tubing Adapter Coupling for J55 N80 L80 P110 Pipe Thread

Oilfield API 5CT Crossover Sub, Tubing Adapter Coupling for J55 N80 L80 P110 Pipe Thread

1. Product Description

The API 5CT Tubing Crossover is a high-performance pipe fitting specifically engineered for oil and gas well tubing systems. Manufactured from premium carbon steel in compliance with API 5CT PSL1/PSL2 standards, this adapter coupling serves as a critical connector that seamlessly bridges tubing sections of different sizes, thread types, or connection specifications. Available in J55, N80, L80, and P110 steel grades, it delivers exceptional mechanical strength and durability under demanding downhole conditions. Its precision-machined seamless/forged construction ensures reliable sealing and structural integrity, making it an indispensable component for well completion, workover operations, and surface flowline connections.

2. Key Technical Parameters

3. Product Application

This tubing crossover is widely used in oil and gas exploration, drilling, and production operations. It is specifically designed for:

• Connecting tubing strings with different outer diameters or thread types during well completion.

• Adapting surface wellhead equipment to downhole tubing assemblies.

• Transitioning between NUE and EUE threads or between different API thread series (STC/LTC/BTC).

• Serving as a repair or emergency connector in workover and intervention operations.

• Integrating into OCTG (Oil Country Tubular Goods) accessory systems for flow control and pressure management.

4. Product Advantages

• Multiple Steel Grade Options: J55 for shallow wells, N80 for medium-depth applications, L80 and P110 for high-pressure and corrosive environments, providing flexible solutions for varied well conditions.

• Strict API Compliance: Full adherence to API 5CT specifications ensures reliable quality, interchangeability, and global industry acceptance.

• Superior Thread Design: Precision-cut threads guarantee leak-proof sealing and easy make-up/break-out during field installation, reducing operational downtime.

• Enhanced Durability: Seamless/forged construction combined with anti-corrosion surface treatment extends service life and reduces maintenance costs.

• Versatile Adaptability: Accommodates multiple thread types and size transitions in a single fitting, simplifying inventory management and reducing the need for multiple connector types.

5. Product Functions

• Size and Thread Transition: Enables safe and efficient connection between tubing sections with different diameters or thread configurations.

• Sealing and Pressure Containment: Provides reliable metal-to-metal sealing to prevent fluid leakage under high-pressure downhole conditions.

• Structural Support: Maintains axial and torsional integrity of the tubing string during deployment and production.

• Operational Flexibility: Allows quick adaptation of surface equipment to subsurface tubing specifications without requiring custom-made parts.

6. Usage Instructions

1. Pre-Installation Inspection: Visually inspect the threads and sealing surfaces for any damage, debris, or corrosion. Clean thoroughly if necessary.

2. Thread Compound Application: Apply API-recommended thread compound evenly to both pin and box threads to ensure proper lubrication and sealing.

3. Stabbing and Make-Up: Carefully align the pin end with the box end, stab straight without cross-threading, then power-torque to the specified API make-up torque value.

4. Post-Torque Check: Verify final position and confirm torque readings are within the allowable range using a calibrated torque gauge.

5. Pressure Test: Conduct hydrostatic or pneumatic pressure testing to confirm sealing integrity before lowering into the wellbore.

7. Precautions

• Always match the steel grade and thread type with the mating tubing to avoid incompatible connections.

• Never exceed the maximum recommended make-up torque, as over-torquing may cause thread galling or premature failure.

• Store in a dry, covered area to prevent moisture-induced corrosion; maintain factory-applied protective coating until installation.

• Do not use if threads show visible galling, nicks, or deformation—inspect with API thread gauges when in doubt.

• For H2S or CO2 service environments, confirm that the selected steel grade (e.g., L80 or P110) meets sour-service requirements (NACE MR0175).

8. Shipping Information

• Lead Time: 15–30 working days after order confirmation, depending on quantity and specification complexity.

• Shipping Method: Via sea freight, air freight, or international courier (DHL/FedEx/UPS) as per customer request.

• Tracking: Shipment tracking number will be provided within 48 hours after dispatch.

• Documentation: Commercial invoice, packing list, bill of lading, and material test certificates (MTC) will accompany each shipment.

9. Payment Terms

10. Packaging

• Standard Packaging: Each piece individually wrapped with anti-rust paper or VCI film, then secured in wooden crates or steel-framed export cases with foam padding to prevent movement and impact damage.

• Thread Protection: Dedicated plastic thread protectors are installed on both ends.

• Labeling: Clear markings of grade, size, thread type, heat number, and API monogram (if applicable) are applied.

• Custom Packaging: Available upon request (e.g., palletized or container-load optimization) at additional cost.

11. After-Sales & Return/Exchange Policy

• Quality Guarantee: All products are 100% inspected and tested before shipment. A Material Test Certificate (MTC) and dimensional inspection report are provided with every order.

• Defective Products: If any non-conformance is found due to manufacturing defects, please notify us within 7 days of receipt with photos and inspection evidence. Free replacement or full refund will be offered after verification.

• Return Conditions: Returns are accepted within 15 days of delivery only for manufacturing defects or wrong specifications caused by the supplier. Return shipping costs are borne by the buyer unless the error is our responsibility.

• Exchange Policy: Exchanges for different sizes or steel grades are possible subject to stock availability; any price difference shall be settled accordingly.

• Technical Support: Our engineering team is available for installation guidance and troubleshooting via email or online meeting within 24 hours of receiving a service request.

• Warranty Period: 12 months from the date of shipment against material and workmanship defects under proper usage conditions.