Nondestructive testing of oil-well tubing is of vital significance to the safety of oil extraction. At the same time, oil-well tubing is very expensive, while a guarantee could be provided to the safety of oil-extraction and the reusing of oil-well tubing by a method of nondestructive testing and quantificational analysis to the defects. Aiming at the fact that domestic researches of defects detection on oil-well tubing are mostly by far qualitative while the quantificational analysis is still on its early ...
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