The Alligator Grab is a wireline fishing tool used to catch and retrieve loose or broken objects from inside an oil or gas wellbore. It has spring-loaded, serrated jaws that can be adjusted before use to set the right amount of grip for the object being retrieved. When downward force is applied, a pin shears, allowing the jaws to close and hold the object securely.

This tool is needed when small or hard-to-reach objects, often called “fish,” are stuck or floating in the wellbore. Unlike other retrieval tools, the Alligator Grab provides a controlled grip that can be adjusted to the size and type of object, reducing the risk of pushing it further down or damaging the well. It is not meant for heavy jarring once it has gripped an object, so it is used for careful and precise recovery.

The Alligator Grab comes in various sizes, with a maximum outside diameter of 1.25 to 3.50 inches, a fishing neck O.D. of 1.187 to 2.313 inches, and top connections ranging from 15/16-10 UN to 1-9/16-10 UN. It includes fishing necks and pin threads compatible with standard wireline equipment.

What makes this type of Alligator Grab unique is its ability to retrieve objects in tight or restricted wellbore spaces. Its adjustable jaws and compact size allow it to securely grip objects that other tools might not reach, making it especially valuable for precise and reliable recovery operations.

The 6 7/8” to 4 1/2” Tubing Hanger Coupling is a specialized connection used in oil and gas wellhead systems to join a large-diameter casing outlet—6 7/8 inches—with 4 1/2-inch upset production tubing. This configuration is typically applied in high-flow and high-pressure wells where maintaining structural integrity and maximizing production efficiency are critical.

The coupling serves as a transition component within a tubing hanger assembly, allowing the tubing to be securely suspended in the wellhead without the need to rotate the Christmas tree during installation. This is made possible by its union nut design, which permits tightening from the side, simplifying assembly in tight or restricted spaces.

The 4 1/2” end is designed for upset tubing, which features thickened ends to provide stronger threaded connections capable of withstanding axial loads and internal pressure. This enhances the mechanical performance of the joint, reduces the risk of fatigue failure, and helps maintain seal integrity over long service periods. The coupling is also threaded to accept a back pressure valve, an essential feature that provides well control during servicing, installation, or emergency conditions.

To meet a variety of operational needs, the top and bottom threads can be customized according to site or equipment specifications. The coupling is typically manufactured from high-strength, corrosion-resistant materials and in compliance with industry standards such as API 5CT, ensuring it performs reliably under harsh downhole conditions.

Overall, the 6 7/8 x 4 1/2” Tubing Hanger Coupling is chosen for its ability to support larger bore wellhead designs while maintaining compatibility with standard tubing strings. It offers a dependable solution in completions where mechanical strength, pressure containment, and ease of assembly are priorities.

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

The 2 3/8" Surface-Controlled Subsurface Safety Valve (SCSSSV) is designed to shut in a well in the event of uncontrolled flow caused by equipment failure or damage. Installed in the upper wellbore, it provides emergency closure of the producing conduits to isolate the wellbore if there is a failure or damage to surface production control systems.

This valve uses a self-equalizing, surface-controlled, flapper-type mechanism that closes reliably when hydraulic control pressure is lost. The flapper is made from solid bar stock and has sealing surfaces located outside the flow path when open, which helps reduce erosion and extends the valve’s service life. It is rated for working pressures up to 10,000 psi.

The valve fits 2 3/8" (60.33 mm) tubing and is installed in landing nipples with seal bore options of 1.710" or 1.875". Valve internal diameter options are 0.62" or 0.75", allowing selection based on flow requirements. The wireline retrievable design permits servicing or replacement of major valve components without pulling the entire tubing string, reducing intervention time and operational disruption.

This valve is typically used in wells with smaller tubing sizes that require dependable emergency shut-in capability. Its design balances reliability, durability, and ease of maintenance to provide effective well control in a variety of well conditions.

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.