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The operations of make-up and break-out in oilfields have a strong impact on the service life of oil tubing thread connections. A series of full-scale tests were performed on samples of J55⌀73.03x5.51 mm API nonupset tubing thread connection. Forty foil gages were placed on the inner surface of the pin thread and the outer surface of the box thread along the axial and circumferential direction. Using...
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