The 4 ½” x 2 3/8” tubing hanger coupling is a specialized downhole component designed to connect two different sizes of upset tubing within a wellhead assembly. Upset tubing refers to tubing that has thicker, reinforced sections at the ends—called “upsets”—which strengthen the threaded connections and help withstand the mechanical stresses and high pressures encountered during well operations. This coupling provides a secure and pressure-tight transition between a larger 4 ½-inch tubing hanger and a smaller 2 3/8-inch production tubing string, enabling effective management of wellbore fluids and maintaining pressure containment.

Engineered to integrate seamlessly with tubing hanger spools, wrap-around tubing hangers (PTHSW), and ‘PTHS’-type tubing spools, this coupling forms part of a modular wellhead completion system. Its union nut design allows installation by screwing the coupling in place without rotating the Christmas tree, simplifying assembly and reducing the risk of damage during installation.

Both the top and bottom ends of the coupling are threaded to customer specifications, offering flexibility for various well configurations and allowing the installation of back pressure valves to maintain well control during operations. Manufactured to API standards and constructed from high-grade materials, the coupling delivers durability and reliable performance in demanding downhole environments characterized by high pressure, temperature, and corrosive fluids.

By facilitating a smooth and strong size transition between different tubing strings, the 4 ½” x 2 3/8” tubing hanger coupling supports well integrity, operational efficiency, and safety throughout oil and gas production.

The 4 ½ x 2 7/8” Tubing Hanger Coupling is a specialized connection component used in oil and gas wellhead systems to join two different sizes of upset tubing—4 ½-inch and 2 7/8-inch. This size combination is commonly selected when there is a need to transition from a wider tubing hanger profile to a smaller production string, without significantly restricting flow or compromising mechanical strength. The slightly larger 2 7/8” production tubing allows for greater internal flow area than smaller alternatives, making this configuration well-suited for completions that aim to support moderate to high production rates.

The coupling is designed with a union nut mechanism, which enables installation without rotating the Christmas tree or disturbing other surface equipment. This simplifies operations, especially in space-limited or sensitive surface environments. Both the top and bottom threads of the coupling can be manufactured to meet specific customer requirements, ensuring compatibility with a range of tubing string designs. Additionally, the coupling is threaded to accommodate a back pressure valve, offering an important safety feature by allowing well pressure to be managed during maintenance or pressure control procedures.

Constructed from high-grade steel and compliant with API standards, the 4 ½ x 2 7/8” Tubing Hanger Coupling offers high durability, corrosion resistance, and the mechanical integrity required for challenging downhole conditions. By supporting a secure, pressure-tight connection between tubing sizes, it plays a key role in maintaining well integrity and operational efficiency in various oil and gas production scenarios.

Drill Collar Severing Tools are used for pipe recovery operations to sever drill collars and heavyweight drill pipe. The tools utilize Explosive Bridge-Wire (EBW) detonators to simultaneously detonate explosive columns, creating a colliding shock wave that severs the tubular with precision.

The tools conform to API RP-67 and are suitable for stuck pipe and plug-and-abandonment (P&A) operations. Detonators are air shippable, and hardware is shipped separately, with assembly performed on location to ensure safe handling and deployment.

EBW detonators increase the precision of the colliding shock waves, providing consistent and controlled severing of tubulars. Tension is typically applied to the tubing prior to detonation to assist in the removal of stuck tubulars and to improve the efficiency of the operation.

These tools are applied in scenarios where accurate, controlled severing is required to recover or remove downhole tubular components safely. They are suitable for a range of tubular sizes and are designed to maintain reliability under the conditions commonly encountered in deepwater, high-pressure, or deviated wellbores.

Drill Collar Severing Tools provide a reproducible method for severing tubulars while minimizing risk to personnel and equipment. Their use ensures that stuck or abandoned tubulars can be removed in a controlled manner, supporting safe and effective pipe recovery operations.

The Wireline Spear is a downhole tool used in oil and gas wells to retrieve lost, broken, or compacted wireline that cannot be engaged with a standard two-prong wireline grab. It is designed for fishing operations where the wireline has become badly balled up or tightly compacted, situations where conventional pronged grabs are ineffective.

The tool is deployed on a wireline and guided down the wellbore under its own weight. Its central mandrel is surrounded by upward-pointing barbs or slips that penetrate and anchor into the wireline. When engaged, these barbs provide a secure grip on the wire, allowing the tool and wire to be retrieved to the surface.

The Wireline Spear is designed for maximum penetration into tightly balled or compacted wire. Its barbs ensure engagement even when the wire is severely entangled. Because the Wireline Spear is effectively non-releasable, it is typically run with a disconnect arrangement above the tool. This allows the assembly to be released if the wire cannot be recovered fully, preventing the tool from becoming stuck in the wellbore.

The tool is available in sizes from 1.5” to 3.5”, with a maximum outside diameter of 1.500” to 3.500” and a fishing neck O.D. of 1.375” to 2.312”. It connects to the wireline through a top connection ranging from 15/16 – 10 UN to 1-1/16 – 10 UN and can retrieve wire diameters from 0.50” to 3.50”.

The Wireline Spear is constructed from steel to withstand downhole mechanical stresses and pressures. Its design includes a central mandrel with upward-pointing barbs that secure tightly compacted or balled-up wireline. The tool’s compact dimensions and engagement mechanism allow it to retrieve wireline that cannot be captured by standard pronged grabs, and it is generally run with a disconnect arrangement above the tool to allow release if the wire cannot be recovered.