Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic

The risk assessment of engineering systems represents an important part of the quality of service and dependability. The existing methods for risk evaluation use crisp sets for rating partial indicators’ proposition and their cumulative products as an overall indicator. In this paper, existing FMEA and FMECA methods have been improved using the fuzzy expert system for calculating the risk priority number. The application of fuzzy logic allows the use of linguistic descriptions for risk analysis. In this way, the state of the system in terms of risks and consequences is better described. The settings of the fuzzy systems are based on the application of two multi-criteria decision-making methods. The AHP method was used to define the mutual relationship of the impact of partial indicators (occurrence, severity, and detectability) on risk. In this way, subjectivity in risk assessment is reduced. In the composition of the fuzzy model, the TOPSIS method is introduced to reduce the dissipation of results, which contributes to the accuracy of the outcome. This contributes to the accuracy of the results. The results were verified through a case study of a complex engineering system—bucket-wheel excavators. The risk was observed from the aspect of the danger of damage and the danger of downtime. The initial information for weak points of ES is defined according to historical damage events and statistics of downtime. Expert knowledge was used for weak points grading in the model. Additional model verification was performed using similar methods, using the same input data. The innovative model, presented in the paper, shows that it is possible to correct different weights of risk indicators. The obtained results show less dispersion compared with other existing methods. Weak points with increased risk have been located, and an algorithm has been proposed for risk-based maintenance application and implementation.

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“…A standard deviation is used to determine the scatter around the value obtained [81]. The Equation for the standard deviation has the form (20):…”

Section: Defuzzificationmentioning

confidence: 99%

Risk Evaluation: Brief Review and Innovation Model Based on Fuzzy Logic and MCDM

et al. 2022

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“…The selection of each method of artificial elevation to be used in a well will depend on some aspects, such as the diameter of the coating, fluid viscosity, sand production, gas-liquid ratio, flow rate, depth of the reservoir, distance from the wells to stations, reservoir production mechanism, among others. Being one of the most important steps to achieve economically efficient production (CRNOGORAC et al, 2020).…”

Section: Oil Wellsmentioning

confidence: 99%

Prospecting Papers and Patents of Gas Lift Valves Technology

Rodrigues

Silva²,

Silva³

2021

Int J Innov Educ Res

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Between the phases of oil exploration and production, there is this oil transfer through natural or artificial elevation method. When this method is natural, the pressure in the reservoir is sufficiently high and the fluids in it can emerge to the surface, but when this pressure is insufficient, the fluids do not reach the surface without the use of artificial lifting methods. Among the struggles to be solved by engineering, there is the optimization of the geometry of the lift gas valves (VGL) and the sealing material. In this context, this article presents the prospecting of papers and patents related to the technological advances of VGL published in the last five years (2016 to 2020) and as a research contribution, there is the identification of solutions regarding the aforementioned optimization. The ScienceDirect, Scopus, CAPES Periodical Portal, and Web of Science databases were used, and the patent search in the database of the European Patent Office (EPO), Espacenet. The results showed that the number of papers published in this area is low, showing that there have been more publications on the subject in the last three years. In addition, China and the United States of America are the countries with the highest number of patents granted in the years surveyed, and the two North American inventors have the greatest number of inventions.

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“…Rating to make an application based on optimization, that is well utilization and service ability. Fuzzy logic as a decision-making tool is used in many disciplines [4]. Fuzzy logic has been approved successfully agreed to offer rougher modelling approach [5,6].…”

Section: Introductionmentioning

confidence: 99%

Fuzzy Logic of Work Conformity in Small Enterprises of Traditional Medicines

Dwinta¹,

Kusuma²,

Pronosokodewa³

et al. 2020

EKSAKTA: J. Sci. Data Anal.

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Good Manufacturing Practices for Traditional Medicine (CPOTB) certification given by National Food and Drug Agency (BPOM) to Small Enterprises of Traditional Medicines (UKOT) is a claim from the production process of traditional medicines that is in accordance with CPOTB. However, not all human resources at UKOT understand and apply existing guidelines in the work practices of traditional medicine production. This study aims to assess the conformity of work by calculating the gap between knowledge of work practices in human resources in one UKOT Yogyakarta with fuzzy method. This assessment is a quantitative, cross-sectional study using a questionnaire that was adapted and modified from six categories of cause and effect. Respondents included in this study were all human resources in UKOT as many as 24 people (total sampling). The results obtained from the gap calculation of work conformity based on the six categories are machinery that have positive values (0,1146). Human resources who work at UKOT have a good understanding of the CPOTB and are already good at implementing work practices in accordance with the CPOTB in the machinery category. The findings that personnel pass through the production area, storage area and quality control area, as well as analysis methods that have not been validated periodically, can be used as an ingredient for improvement by implementing corrective-action-preventive-action on order to improve the quality of work in accordance with CPOTB and guarantee the quality of traditional medicine products from the UKOT Yogyakarta.

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Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic

Cited by 20 publications

References 21 publications

Risk Evaluation: Brief Review and Innovation Model Based on Fuzzy Logic and MCDM

Risk Evaluation: Brief Review and Innovation Model Based on Fuzzy Logic and MCDM

Prospecting Papers and Patents of Gas Lift Valves Technology

Fuzzy Logic of Work Conformity in Small Enterprises of Traditional Medicines

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