Make-up/break-out evaluation method for threaded joint for oil country tubular goods

A make-up/break-out evaluation method for a threaded joint for oil country tubular goods, the make-up/break-out evaluation method configured to perform make-up/break-out by power tongs with respect to the threaded joint for oil country tubular goods including a box having a female thread and a pin having a male thread, the make-up/break-out evaluation method comprising:

• when performing a make-up/break-out test with respect to the threaded joint for oil country tubular goods formed by attaching a lower portion of the pin to an upper portion of the box placed with an axis directed vertically,
• using, as the pin for use in the test, a pin for test formed by a pin shorter than an evaluation target pin;
• attaching a weight to an upper portion of the pin for test and setting a mass of the weight to be equal to or greater than a mass obtained by subtracting a mass of the pin for test from a mass of the evaluation target pin;
• and
• setting an initial set position to a state where five crests of the pin for test or ¼ of all crests of the pin for test, whichever is greater, or more are exposed from an upper end face of the box, the initial set position being a make-up start position before make-up, the make-up configured to make up the pin for test by the power tongs.