• 36- and 38-inch Viper Connectors


    The Viper connector in 36-inch and 38-inch sizes is designed with a near-flush OD connector profile. These connector sizes are often used for subsea well conductors. The near-flush OD connector profile provides specific benefits: 

    • The 36-inch connector will pass through a 37-1/2 inch rotary bushing.
    • The connectors easily pass through standard subsea accessories, including mudmats and guide bases.
    • The near-flush OD connector profile minimizes soil disturbance during jetting, improving the load carrying capacity of the conductor.

    The 36-inch and 38-inch Viper connector designs include a machined OD profile that interfaces with the Viper Bolt-on Lift Ring, used as a removable lift shoulder for handling with elevators.

    Viper connectors are designed as a family of parts. All designs in all sizes share common features including the threadform, stress re-distribution grooves, dual seals and redundant capture features. The 36-inch and 38-inch Viper connectors simply incorporate these features into a near-flush OD connector body. The Viper development program included specific analysis and extensive physical testing of the 36-inch connector geometry.

    Click here to download a Viper product summary sheet.   

    Specs Direct


    Viper connectors have a dual-seal design: an elastomeric O-ring as the primary seal and a secondary metal-to-metal seawater exclusion seal. Viper connectors are rated at 100% of pipe body for internal pressure, external pressure, tension, compression and bending capacity in most sizes. Extensive finite element analysis and physical testing have been used to verify performance capacities across the Viper product line.

    Two thread configurations are available: the Viper-1ST connector makes up in approximately 1-3/4 turns and the Viper-3ST connector makes up in just over 1/2 turn. Make-up torques range from 50,000 to 70,000 ft-lbs depending on size. Viper connectors are suitable for make-up with either power tongs or manual tongs.

    Viper connectors are the most extensively analyzed and tested large diameter connectors on the market today. Reliable and validated connector performance makes Viper ideally suited to high-profile, extreme service conductor and casing applications. Viper connectors are manufactured in 16 to 38-inch diameters.