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Details of inspection Examination of the external surface of drill pipe and HWDP upsets and slip areas using the active-field AC yoke dry visible magnetic particle technique. Evaluated by flaw such as fatigue cracks, corrosion pits, cuts, gouges, and other damage that exceed the specified acceptance limits.
Examination of drill pipe and HWDP upsets and slip area using shear wave ultrasonic equipment. Evaluated by flaw such as fatigue cracks, corrosion pits, cuts, gouges, and other damage that exceed the specified acceptance limits.
Visual examination of connection, shoulder, and tool joints and profile check of threads. Evaluated by handling damage, galling, washouts, fins, visibly non-flat shoulders, corrosion, weight /grade marking on tool joint.
Measurement or Go-No-Go gauging of pin and box OD, pin ID, shoulder width, tong space, box counterbore. Evaluated by torsional capacity of pin and box, adequate shoulder to support make-up stress, adequate gripping space for tongs.
Fluorescent wet magnetic particle inspection using DC current. Evaluated by existence of fatigue cracks.
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