A novel profile-insensitive multi-electrode induction flowmeter suitable for industrial use

Horner, Brian R.

doi:10.1016/s0263-2241(98)00048-7

Cited by 10 publications

(6 citation statements)

References 3 publications

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“…The shape and size of the excitation coil are mainly researched in the area of excitation optimization and design. However, the design of excitation system is limited in space under special annular environment [8]. Therefore, this study is aimed at the optimization of the electrode of the downhole annular electromagnetic measurement equipment through theoretical research, finite element simulation and data evaluation.…”

Section: Introductionmentioning

confidence: 99%

“…At present, there are many researches on electrode optimization and design, including the number, position and structure size of the electrodes. In 1998, Horner B began to study the industrial multi-electrode electromagnetic flowmeter [8], which played a key role in improving the accuracy of electromagnetic flow measurement. In 2000, Lucas G P proposed a six-electrode electromagnetic flow measurement system [9].…”

Section: Introductionmentioning

confidence: 99%

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Electrodes Optimization of an Annular Flow Electromagnetic Measurement System for Drilling Engineering

Huang

et al. 2020

IEEE Access

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The early monitoring of downhole overflow can be effectively realized by the downhole annular electromagnetic flow detection system. In order to improve the accuracy of the electromagnetic measurement system of downhole annular flow, it is important to optimize the excitation system and electrodes of this system. This research focuses on the optimization of the electrodes for the electromagnetic measurement system of downhole annular flow, whose excitation system has been optimized. First, the basic principle of electromagnetic measurement of downhole annular flow is analyzed. Then, the influence of different positions of the four-point electrodes on the virtual current distributions is analyzed, and the optimum electrode positions and distributions are introduced. On this basis, the influence of shape and size of the large electrode on virtual current density distribution is analyzed. Based on the theoretical study of the influence of electrode on virtual current density distribution, taking hemispherical electrodes and arc electrodes as examples, this paper optimizes hemispherical electrodes and arc electrodes with different shapes and sizes by using finite element simulation method, and proposes three indexes to evaluate the annular virtual current density distributions when the electrodes of different shapes are used. The optimum parameters of shapes and sizes of the hemisphere electrodes and arc electrodes under specific structures of the downhole annular electromagnetic flow measurement system are obtained. This research has great significance for the optimization of electrodes in the downhole annular electromagnetic flow measurement system, and can also be used as reference for the electrode optimization of the traditional electromagnetic flowmeter.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrodes Optimization of an Annular Flow Electromagnetic Measurement System for Drilling Engineering

Huang

et al. 2020

IEEE Access

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“…Horner B improved the measurement accuracy of flow measurement by increasing the number of electrodes [4,5]. Michalski et al investigated the design of the coils of an electromagnetic flowmeter in 1998 [6].…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization of Annular Flow Electromagnetic Measurement System for Drilling Engineering

Wang

et al. 2018

Journal of Sensors

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Using the downhole annular flow measurement system to get real-time information of downhole annular flow is the core and foundation of downhole microflux control drilling technology. The research work of electromagnetic flowmeter in recent years creates a challenge to the design of downhole annular flow measurement. This paper proposes a design and optimization of annular flow electromagnetic measurement system for drilling engineering based on the finite element method. Firstly, the annular flow measuring and optimization principle are described. Secondly, a simulation model of an annular flow electromagnetic measurement system with two pairs of coil is built based on the fundamental equation of electromagnetic flowmeter by COMSOL. Thirdly, simulations of the structure of excitation system of the measurement system are carried out, and simulations of the size of the electrode's radius are also carried out based on the optimized structure, and then all the simulation results are analyzed to evaluate the optimization effect based on the evaluation indexes. The simulation results show that optimized shapes of the excitation system and electrode size can yield a better performance in the annular flow measurement.

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“…For state of the art EMFMs including optimization of the coil shape and the effects of spatially varying conductivity and asymmetric flows, see [1][2][3][4][5][6]. In addition, in order to enhance the accuracy of flow rate measurement of highly asymmetric single phase flows, different multi-electrode approaches to electromagnetic flow measurement have been proposed [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Correlated noise and prior models in electromagnetic flow tomography

Lehtikangas¹,

Vauhkonen²

2017

Meas. Sci. Technol.

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Electromagnetic flow meters are a gold standard in measuring the mean flow velocity of conductive liquids and slurries in process industry. A drawback of this approach is that the velocity field cannot be determined. Information about velocity fields is important for characterizing multiphase flows in the process industry. Recently, electromagnetic flow tomography (EMFT) has been proposed for measuring velocity fields using several coils and a set of electrodes attached to the inner surface of the pipe. The velocity field reconstruction method utilizes a finite element based computational forward model and a Bayesian framework for inverse problem. In the approach, a priori probability and noise models are written describing the flow and measurement error characteristics, respectively. In this work, the effect of additive, possibly correlated, measurement noise and different prior models on the velocity field reconstructions in EMFT are tested using numerical simulations. The results show that the velocity field reconstruction method produces feasible estimates even with relatively high level of correlated measurement noise if the covariance structure of the noise is taken into account. In practice, the noise covariance can be estimated from measurements using sample based methods. Moreover, it is shown that a smoothness prior using a squared exponential covariance function is in general a good choice for the prior model and more advanced prior models for specific flow types such as stratified or turbulent flows can be used.

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A novel profile-insensitive multi-electrode induction flowmeter suitable for industrial use

Cited by 10 publications

References 3 publications

Electrodes Optimization of an Annular Flow Electromagnetic Measurement System for Drilling Engineering

Electrodes Optimization of an Annular Flow Electromagnetic Measurement System for Drilling Engineering

Design and Optimization of Annular Flow Electromagnetic Measurement System for Drilling Engineering

Correlated noise and prior models in electromagnetic flow tomography

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