The frequent occurrence of oil theft incidents in long oil and gas pipelines has brought certain difficulties to the integrity management of petroleum enterprises.Traditional detection methods are difficult to effectively distinguish between newly added and repaired oil theft holes.This article develops a drilling oil theft detector based on the fusion of weak magnetic and eddy currents.The recognition method of circumferential weld seam feature signals is based on the weak magnetic radial and eddy currents.By utilizing the principle of consistency in feature signal interpretation and combining with the characteristics of the oil theft hole itself,new and repaired oil theft hole signals are effectively identified,avoiding omissions and misjudgments.This provides certain technical support for future oil and gas pipeline oil theft hole signal recognition.
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