Tubing Hanger Coupling – 6 5/16” to 2 1/2”

Tubing Hanger Coupling

Also known as:

Tubing Coupling, Tubing Hanger Adapter

Tubing Hanger Coupling – 6 5/16” to 2 1/2”

Tubing Hanger Coupling

Also known as:

Tubing Coupling, Tubing Hanger Adapter

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Delivery Time:

4 - 6 Weeks

Note:

The 6 5/16 x 2 1/2” Tubing Hanger Coupling is designed to connect larger casing heads to smaller production tubing, offering a strong and pressure-rated transition ideal for higher-capacity wellheads where 2 1/2

Executive Summary

The 6 5/16 x 2 1/2” Tubing Hanger Coupling serves as a critical link between larger bore wellhead outlets and 2 1/2” production tubing. This configuration is commonly used when a well design requires a wider casing head but a more streamlined production string for flow control or space constraints.

Its robust build supports high-pressure conditions, while the upset-end compatibility enhances joint strength and sealing reliability. With threaded connections tailored to operational needs and the ability to integrate a back pressure valve, this coupling ensures a secure, adaptable, and efficient transition in complex wellhead assemblies.

Technical Specifications

Tubing Size (Top) 6 5/16”
Tubing Size (Bottom) 2 1/2”
Standard API
Tubing Type Upset Tubing
Installation Union nut, no Xmas tree rotation
Threading Customizable top & bottom threads
Features Threaded for back pressure valve
Usage Works with tubing hanger spools
Material Alloy steel
Compatibility Fits standard tubing hanger systems

Features and Benefits

  • Provides a secure, pressure-tight connection between different tubing sizes.
  • Connects 6 5/16” casing outlet to 2 1/2” upset tubing.
  • Designed to match wider casing or hanger bore openings.
  • Machined precisely for secure sealing under high-pressure conditions.
  • Upset tubing and secure threading help reduce the risk of failure from axial loads or vibration.

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Detailed Description

The 6 5/16” to 2 1/2” Tubing Hanger Coupling is a specially made part used in oil and gas wells to connect a large casing opening to smaller tubing—typically 6 5/16 inches—to a smaller 2 1/2-inch upset production tubing. This size combination is often selected for well designs that require a broader casing interface for flow management, safety equipment, or well control hardware, while maintaining a slimmer production string for specific flow requirements or structural considerations.

This coupling is manufactured with upset-end compatibility, meaning it is suited for tubing that has thickened ends designed to strengthen threaded connections. This feature improves mechanical reliability and helps the connection withstand downhole pressure, tensile loads, and thermal cycling. The union nut design allows the coupling to be installed by tightening the nut without rotating the upper wellhead assembly, which is particularly useful in space-constrained or high-integrity environments.

To accommodate a range of operational needs, the coupling can be threaded on both ends to suit different tubing or spool designs and is compatible with back pressure valves—providing added safety during pressure control, intervention, or servicing. Built in accordance with API specifications and from high-strength materials, the coupling is designed to operate reliably in demanding conditions, including high-pressure wells and corrosive environments.

Engineering Data