• Thread Compound Application

    Clean Connection Surface

    Make sure that the threads as well as primary and secondary shoulder of the pin and box are clean and free of drilling fluids/solids. Thread compound adheres best to a clean surface. Also, drilling fluids/solids pose a risk for micro-washout. It may be necessary to rinse drilling fluid off threads before applying compound.

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    Thread Compound Selection

    We do not endorse any particular thread compound brand or product over another. However, we do recommend the use of copper-based thread compound because it:

    • Gives more consistent torque values
    • Comes with increased friction factor
    • Shows better galling resistance

    Proper Application

    Use a good quality brush that does not lose its hair (which can create a channel for micro-washout when trapped between sealing shoulders). Before make-up, the following surfaces of pins and boxes shall be coated with a good quality thread compound:

    • threads (~1/3 of thread height)
    • primary shoulder
    • secondary shoulder when applicable (double shoulder connections)
    • metal-to-metal seal when applicable (XT-M™, TT-M™, TF-M™, CT-M™, GT-M™)

    Be sure to fully coat both the pin and box. Thread compound will not spread out when connections are made-up. Proper thread compound application must be done before make-up.

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    When To Apply Thread Compound

    Pins and boxes must receive fresh compound. Common practice is to apply it:

    • on boxes during POOH (Pull-out-of-hole)
    • on pins during RIH (Run-in-hole)

    Racking pipe stands will wipe thread compound off the pin nose of a double shoulder connection. Ensure that full application of thread compound has been achieved just before make-up.

    Compound Friction Factor (FF)

    The compound friction factor (FF) reflects its resistance to torquing. The higher the FF, the more torque can be applied to load the connection with the same stress. Unless otherwise specified, our documents show make-up torque based on FF of 1.0. Multiply our torque values (with 1.0 FF) by the compound supplier FF value (without exceeding 1.15).

    Example: Recommended MUT for XT39 (5 x 2-9/16") with 1.0 FF compound is 24,500 ft-lb

    • With 1.10 FF, apply 26,900 ft-lb (1.10 x 24,500)
    • With 1.20 FF, apply 28,175 ft-lb (1.15 x 24,500)
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