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.

Available sizes: 2 3/8”, 2 7/8”, 3 1/2”, 4”, 4 1/2”, 5”, 5 1/2'”  and 7”

The 3-1/2" WR-SCSSSV FXE is a Ballycatter model safety valve specifically designed for installation in the upper wellbore to provide an emergency shut-off of the production flow path. This valve plays a crucial role in well control by isolating the wellbore during emergency situations such as system failures or damage to surface production control facilities. Its fail-safe design ensures that the valve automatically closes to protect the wellbore and surface equipment whenever a fault occurs.

This safety valve is a flapper-type valve that is both surface controlled and wireline retrievable, allowing operators to easily deploy, operate, and retrieve the valve without extensive well intervention. The valve is installed within a corresponding model Landing Nipple, ensuring precise fit and reliable operation within the tubing string.

The design incorporates a self-equalizing mechanism that balances pressure differentials across the valve, which helps maintain consistent performance even under varying downhole pressures. This self-equalizing feature reduces the risk of valve malfunction due to unexpected pressure changes.

When the valve is in the open position, the sealing surfaces are positioned outside the flow path, ensuring that the fluid can pass freely without obstruction or erosion on the sealing components. This arrangement optimizes flow efficiency and helps extend the valve’s operational life. The flapper itself is made from solid bar stock, providing a strong and durable barrier that can withstand the harsh conditions found in high-pressure well environments.

The valve is rated for working pressures up to 10,000 psi, allowing it to operate reliably under high-pressure well conditions. The 3-1/2" WR-SCSSSV FXE is designed to ensure wellbore isolation in emergency situations, providing a critical safety function in the well control system.