Stability Monitoring of Electrolytic Conductivity Reference Materials Under Repeated Use Conditions by the Primary Measurement Method

Cunha, Kleiton da Cruz; Pardellas, Leonardo da Silva; Gonzaga, Fabiano Barbieri

doi:10.1007/s10953-020-00961-9

Cited by 4 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Then the length of the liquid column is increased to 2 l + L by putting the central extension tube between two half-cells, and resistance Rm2 (Ω) is measured. The EC is expressed by the equation [8]- [10]:…”

Section: Physical Model Of a Cellmentioning

confidence: 99%

See 1 more Smart Citation

Methodological errors due to a non-cylindrical surface in a Jones-type cell with a removable center extension tube

Stennik,

Mikhal,

Meleshchuk

2023

Acta IMEKO

View full text Add to dashboard Cite

The article shows an idealized model of a Jones-type cell with a removable central extension tube. Two main factors leading to the cylindricity distortion of the inner surface of the cell are considered. These are radial displacement and tube diameter inequality. Based on the finite element method (FEM), errors in measuring the resistance of a liquid column caused by the non-uniformity of the current density distribution inside the cell were determined. The methodological error with respect to the idealized model was estimated for each factor separately and in combination. The Authors show that at a radial displacement of 0.6 mm, the error can reach 0.1 %. The same error value occurs when the inequality of the diameters is only 20 μm.

show abstract

Section: Physical Model Of a Cellmentioning

confidence: 99%

“…The dimensions of such cells are accurately measured. The main types of such primary cell designs are a Jones-type cell with a removable central extension tube [3]- [7] and a cell with a movable electrode [6]- [10].…”

Section: Introductionmentioning

confidence: 99%

Methodological errors due to a non-cylindrical surface in a Jones-type cell with a removable center extension tube

Stennik,

Mikhal,

Meleshchuk

2023

Acta IMEKO

View full text Add to dashboard Cite

show abstract

“…In the process of using a traditional conductivity cell to detect the conductivity of the solution, the determination of the conductivity cell constant and the cell constant has a great influence on the error in the detection process [32]. In order to accurately measure the conductivity of the well fluid, it is necessary not only to calibrate the conductivity cell constant with an accurate KCl solution but also to place a detection electrode with an accurate size to ensure that the detection electrode is in complete contact with the solution to be measured, thereby obtaining an accurate conductivity value [33], [34]. However, in the actual logging process, because of the complex electrolyte composition in the well fluid, the problem of dynamic liquid level, and the interference of various electromagnetic noises in the well, it is impossible to quantitatively determine the values of conductivity cell constant and electrode constant [35].…”

Section: Key Problems Of Conductivity Detectionmentioning

confidence: 99%

Instrument Design for Detecting the Inner Damage of Casing

Guo

Yong

Li³

et al. 2021

IEEE Access

View full text Add to dashboard Cite

Detecting and localizing the inner damage of the downhole casing is crucial for oil and gas production. The current methods for damage detection suffer from polarization effect, capacitance effect, and difficulty in measuring weak direct current signals. As an alternative, we propose a new instrument design based on a six-electrode array in this study. The basic detection principle is introduced, and the key factors that affect the detection performance are studied through modeling and simulation. Besides, the entire system of the instrument design consisting of several modules is presented. In addition, an experiment is conducted to demonstrate the detection capability of the proposed design. It is found that the detection dynamic of the instrument is 93 dB and a signal-to-noise ratio is 73 dB. It can detect damage when salinity is lower than 120 g/l and can identify the location of damage with high resolution in the longitudinal and radial directions.

show abstract

“…Several designs of such cells are known, which are used as primary ones. The most popular among national metrology institutes (NMIs) are Jones-type cells with a removable central extension tube [1][2][3][4][5][6][7] and cells with a moving electrode [6][7][8][9][10]. Regardless of the cell design, the method for measuring EC remains the same.…”

Section: Introductionmentioning

confidence: 99%

“…The method is implemented by measuring the difference in resistance between two liquid columns of the same diameter but different lengths. Thus, the basis of a cell of any design [1][2][3][4][5][6][7][8][9][10] is always the electrical resistance of a virtual liquid column with a known geometry, which ultimately determines the cell constant. For an idealized model (figure 1), the constant can be easily calculated by its geometric parameters L (m) and D (m), but the question arises of how to fill such a cell with liquid.…”

Section: Introductionmentioning

confidence: 99%

Resistance bias estimation of a liquid column in a cylindrical conductivity cell with lateral liquid supply

Stennik,

Mikhal

2024

Eng. Res. Express

View full text Add to dashboard Cite

The article shows an idealized model of a cylindrical two-electrode conductivity cell with inletand outlet holes for filling located perpendicular to the cell axis. Based on the finite elementmethod (FEM), the non-uniformity of the current density distribution inside the cell wasdetermined. For a range of geometrical parameters of the cell, the resistance biases of the liquidcolumn with respect to the idealized model—a cell with a uniform current density distribution(without holes) are calculated. A mathematical expression is given that describes calculatingthe electrolytic conductivity value using the geometrical parameters of a conductivity cell,taking into account the field distortion caused by holes for filling. It has also been found that atthe ratio of the cell diameter to the hole diameter D/d ≥ 5, the entire field distortion inside thecell is provided by a liquid column in the holes with a length of only (h ≤ d) mm. Theoreticalestimates and mathematical models highlighted in this article were used in the creation of theprimary differential conductivity cell. Structurally, such a cell consists of two tubes of the samediameter but of different lengths, at the edges of which platinized electrodes are placed.

show abstract

Stability Monitoring of Electrolytic Conductivity Reference Materials Under Repeated Use Conditions by the Primary Measurement Method

Cited by 4 publications

References 16 publications

Methodological errors due to a non-cylindrical surface in a Jones-type cell with a removable center extension tube

Methodological errors due to a non-cylindrical surface in a Jones-type cell with a removable center extension tube

Instrument Design for Detecting the Inner Damage of Casing

Resistance bias estimation of a liquid column in a cylindrical conductivity cell with lateral liquid supply

Contact Info

Product

Resources

About