From Event: SPIE Commercial + Scientific Sensing and Imaging, 2017
In order to ensure the safety of the environment during hydrocarbon extraction operations, downhole nondestructive testing of the well casings is of the utmost importance. To this purpose, rotating field eddy current has been recently proposed as an alternative to the state-of-the-art array sensors and mechanically rotating sensors. In this paper, we present an analytical approach to modeling of such a sensor. We study the sensor sensitivity to the small defects by coupling the model with the dipole-based model of small defects.
Darko Vasić, Davorin Ambruš, and Vedran Bilas, "On feasibility of a rotating field eddy current sensor for nondestructive testing of ferromagnetic oil-well casings," Proc. SPIE 10215, Advanced Environmental, Chemical, and Biological Sensing Technologies XIV, 102150P (Presented at SPIE Commercial + Scientific Sensing and Imaging: April 10, 2017; Published: 3 May 2017); https://doi.org/10.1117/12.2262971.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon