Test apparatus for a threaded joint for oil country tubular goods

A test apparatus for testing a threaded joint for oil country tubular goods using a first and a second steel pipe for use as oil country tubular goods comprising:

• a base which holds a first steel pipe in an upright position with an upper end of the first steel pipe projecting above an upper surface of the base and the remainder of the first steel pipe disposed through the base and partly under the ground;
• a support member which extends upwards from the base and is spaced from the first steel pipe;
• a suspending mechanism which suspends a second steel pipe above the first steel pipe;
• a first tong which grasps the first steel pipe;
• a second tong which grasps the second steel pipe and rotates the second steel pipe around its axis to carry out make-up and break-out of the first and second steel pipes by means of the threaded joint to be tested;
• and
• a stabilizer which is mounted on the support member such that its height can be raised or lowered and which restricts the radius of gyration of the second steel pipe at the height of the stabilizer within a predetermined value.