BENEFITS

• Excellent gas-tight sealing
• Decades of successful field experience
• Easy to run and repair

Metal-to-Metal Seal

• The tapered VAM metal-to-metal seal is energized by a reverse angle torque shoulder, a design which has been field proven in thousands of applications the world over.
• Tubing: a 30° angle seal provides excellent gas tightness even after repeated make-up and break-out. The design virtually eliminates all risk of seal galling.
• Casing: a low taper seal (10% taper on diameter) provides gas tightness under high tension loads such as with heavy string weights.

Reverse Angle Torque Shoulder

• The reverse angle torque shoulder provides a positive torque stop, which allows for accurate power tight make-up and minimizes hoop stresses in the connection.
• The wedge effect caused by the reverse angle gives the connection superior structural strength.

Improved Buttress Thread

• Because the vanishing threads are covered by the coupling, the connection tensile efficiency is maximized.
• Clearance at the top of the thread crests minimizes thread galling and avoids the trapping of compound inside the threads.
• The design facilitates easy stabbing without cross-threading and fast trouble-free make-up.

Coupling Design

• Tubing: longer couplings, with optimized O.D.s, are provided in order to ensure 100% tensile efficiency.
• Casing: coupling O.D.s are the same as the API Buttress couplings in order to conform to standard running and handling equipment.

Streamlined Internal profile

• Tubing: a 6° pin ID chamfer in tubing sizes, reduced tolerances on the coupling center bore and a long shoulder contribute to minimize turbulence and energy loss inside the tubing connection.
• Casing: a 15° pin ID chamfer and long shoulder will also facilitate the running of completion equipment avoiding the damage that occurs when using non premium connections.

Options

• NEW VAM MS (Matched Strength): for 100% tensile efficiency as for heavy loads caused by long casing string.
• NEW VAM SC (Special Clearance): for extra clearance applications, as when annular space is a limiting factor.
• NEW VAM SB (Special Bevel): coupling face has a 20° bevel to avoid hang-ups in multiple completion programs.