Factors Affecting Spatial Resolution in Pulsed Eddy Current Inspection of Pipe

Fu, Yuewen; Underhill, P. R.; Krause, Thomas W.

doi:10.1007/s10921-020-00679-0

Cited by 13 publications

(2 citation statements)

References 18 publications

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“…The mechanism of polymer flooding involves adding a high-molecular-weight polymer to the injected water to increase the viscosity of the flooding phase, adjusting the water absorption profile, and increasing the swept volume of the flooding phase, thereby improving the ultimate recovery factor. Since polymer flooding in the Daqing Oilfield was put into industrial application in 1996, it has achieved remarkable technical and economic growth [ 1 , 2 , 3 ]. In 2002, the annual oil production from polymer flooding in the Daqing Oilfield exceeded 10 million tons.…”

Section: Introductionmentioning

confidence: 99%

Study on Micro Production Mechanism of Corner Residual Oil after Polymer Flooding

et al. 2022

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To study the microscopic production mechanism of corner residual oil after polymer flooding, microscopic visualization oil displacement technology and COMSOL finite element numerical simulation methods were used. The influence of the viscosity and interfacial tension of the oil displacement system after polymer flooding on the movement mechanism of the corner residual oil was studied. The results show that by increasing the viscosity of the polymer, a portion of the microscopic remaining oil in the corner of the oil-wet property can be moved whereas that in the corner of the water-wet property cannot be moved at all. To move the microscopic remaining oil in the corners with water-wet properties after polymer flooding, the viscosity of the displacement fluid or the displacement speed must be increased by 100–1000 times. Decreasing the interfacial tension of the oil displacement system changed the wettability of the corner residual oil, thus increasing the wetting angle. When the interfacial tension level reached 10−2 mN/m, the degree of movement of the remaining oil in the corner reached a maximum. If the interfacial tension is reduced, the degree of production of the residual oil in the corner does not change significantly. The microscopic production mechanism of the corner residual oil after polymer flooding expands the scope of the displacement streamlines in the corner.

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Section: Introductionmentioning

confidence: 99%

Study on Micro Production Mechanism of Corner Residual Oil after Polymer Flooding

et al. 2022

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“…It is widely used in industrial fields such as the automatic control, intelligent manufacturing and structural health monitoring [1]. The effect of ECT is affected from the position and shape of coil [2]. In conventional ECT methods, the coil is usually placed parallel to the conductor [3][4][5], as shown in figure 1(a).…”

Section: Introductionmentioning

confidence: 99%

A novel model for calculating the impedance of arbitrarily-shaped coils with perpendicular to the planar medium

Wu¹,

Feng²

2022

J. Phys. D: Appl. Phys.

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Some studies have shown that coils placed perpendicular to conductors have excellent detection results for specific defects in eddy-current testing (ECT), where the impedance is an important parameter. The impedance calculation for perpendicular coil is more complex than that for parallel coil, and currently the main focus is on the impedance analysis of circular and rectangular coils. In this paper a closed formula for the impedance of a coil with arbitrary-shape perpendicular to the conductor is given based on the second order vector position (SOVP) method. In the proposed model, a novel shape and position function is defined to extend the coil application to arbitrary shapes. Meanwhile, experimental comparisons are conducted to evaluate the impedance of various coils on an aluminum plate. The result illustrated that the experimental values are in perfect agreement with the calculated ones. Therefore, the proposed model can provide guidance for the impedance calculation of arbitrarily-shaped coils in eddy current testing.

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Enhancement of Thickness Measurement in Eddy Current Testing Using a Log–Log Method

et al. 2021

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Factors Affecting Spatial Resolution in Pulsed Eddy Current Inspection of Pipe

Cited by 13 publications

References 18 publications

Study on Micro Production Mechanism of Corner Residual Oil after Polymer Flooding

Study on Micro Production Mechanism of Corner Residual Oil after Polymer Flooding

A novel model for calculating the impedance of arbitrarily-shaped coils with perpendicular to the planar medium

Enhancement of Thickness Measurement in Eddy Current Testing Using a Log–Log Method

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