Maintenance Plan for a Fleet of Rotary Drill Rigs/Harmonogram Utrzymania I Konserwacji Floty Obrotowych Urządzeń Wiertniczych

2014 ◽  
Vol 59 (2) ◽  
pp. 441-453 ◽  
Author(s):  
Mohammad Javad Rahimdel ◽  
Mohammad Ataei ◽  
Reza Khalokakaei ◽  
Seyed Hadi Hoseinie
Keyword(s):  
Reliability Analysis ◽  
Preventive Maintenance ◽  
Performance Data ◽  
Reliability Modeling ◽  
Failure Data ◽  
Sarcheshmeh Copper Mine ◽  
Maintenance Program ◽  
And Performance ◽  
Drilling Rigs ◽  
Maintenance Plan

Abstract In this paper a basic methodology was used for the reliability modeling and developing a maintenance program for a fleet of four drilling rigs. Failure and performance data was collected from Sarcheshmeh Copper Mine in Iran for a two-year period. Then the available data was classified and analyzed and reliability of all subsystems and whole rigs were modeled and studied. The failure data showed that, in all rigs, electrical, hydraulic and drilling systems are the most frequent failing subsystems of the machine. The reliability analysis showed that transmission system is the most reliable subsystem in all studied rigs. In order to calculate the reliability of whole fleet, it was assumed that operation of at least two drilling rigs is essential for satisfying the production goals. Therefore, probabilistic possibility of all fleet’s states were calculated. In this paper, 80% is selected as the desired level of reliability for developing of preventive maintenance program for each subsystem of the drilling rigs. Finally, the practical approaches were suggested for improving the maintenance operation and productivity of the studied fleet.

Observed and unobserved heterogeneity in failure data analysis

2021 ◽  
pp. 1748006X2110225
Author(s):  
Rezgar Zaki ◽  
Abbas Barabadi ◽  
Javad Barabadi ◽  
Ali Nouri Qarahasanlou
Keyword(s):  
Reliability Analysis ◽  
Systematic Approach ◽  
Unobserved Heterogeneity ◽  
Reliability Modeling ◽  
Operational Conditions ◽  
Failure Data ◽  
Operation And Maintenance ◽  
Maintenance Decisions ◽  
Data Heterogeneity

In reality, failure data are often collected under diffract operational conditions (covariates), leading to heterogeneity among the data. Heterogeneity can be classified as observed and unobserved heterogeneity. Un-observed heterogeneity is the effect of unknown, unrecorded, or missing covariates. In most reliability studies, the effect of unobserved covariates is neglected. This may lead to inaccurate reliability modeling, and consequently, wrong operation and maintenance decisions. There is a lack of a systematic approach to model the unobserved covariate in reliability analysis. This paper aims to present a framework for reliability analysis in the presence of unobserved and observed covariates. Here, the unobserved covariates will be analyzed using frailty models. A case study will illustrate the application of the framework.

Improvement of Preventive Maintenance Plan for an Automatic Labeling System: A Case Study of a Carbonated Soft Drink Industry

2014 ◽  
Vol 875-877 ◽  
pp. 1312-1317
Author(s):  
Onuma Kosanan ◽  
Nisakorn Somsuk ◽  
Chitlada Maimun ◽  
Worlaluck Satianrangsarith
Keyword(s):  
Preventive Maintenance ◽  
Soft Drink ◽  
Problem Analysis ◽  
Problem Solving Skills ◽  
System A ◽  
Maintenance Program ◽  
Set Up ◽  
Labeling System ◽  
Maintenance Plan

The aims of this research are to improve the preventive maintenance plan and to prepare the autonomous maintenance plan of an automatic labeling system for a carbonated soft drink industry as a case study. The labeling system of the case study has experienced the wastes in maintenance. According to the maintenance problem analysis, the main causes are lack of or inadequate preventive maintenance program, inadequate work order monitoring system, and inadequate staff skills (problem-solving skills of maintenance) to perform work. Therefore, in order to reduce the number and length of machine breakdowns and the seriousness of breakdowns, the preventive maintenance program is used instead of breakdown and routine maintenance by which maintenance skills are required, and in order to improve how machines are operated and handled by improving the skills, and the autonomous maintenance manual is set up to prepare for autonomous maintenance. After the improved preventive maintenance plan has been developed and then implemented, it was found that machine downtime reduced by 1.35% and machine availability increased by 1.74%.

scholarly journals El mantenimiento en los procesos industriales y la causa raíz de los problemas

2015 ◽  
Vol 1 (1) ◽  
pp. 63
Author(s):  
Ricardo Prada
Keyword(s):  
Preventive Maintenance ◽  
Negative Impact ◽  
Global Market ◽  
Complete Loss ◽  
Operating Costs ◽  
Know How ◽  
Maintenance Program ◽  
And Performance

ONTARE. REVISTA DE INVESTIGACIÓN DE LA FACULTAD DE INGENIERÍAParadas intempestivas de la producción ocasionadas por falta de mantenimiento, en momentos en que hay entregas críticas de por medio, pueden tener tal impacto negativo que conllevan en ocasiones hasta la pérdida total de confianza por parte del cliente y por ende, la reducción de futuros negocios. Las empresas que desean alcanzar la competitividad y niveles adecuados de rendimiento en el mercado global de nuestros tiempos, requieren no sólo que su personal esté debidamente preparado y capacitado sobre reparaciones básicas, sino que además, los gerentes mismos tengan clara la importancia delmantenimiento y conozcan cómo actuar ante imprevistos, muchas veces recurrentes, por paradas intempestivas en sus plantas, por la falta de un adecuado programa de mantenimiento que les permita reducir los costos de operación, mejorar la productividad, maximizando el rendimiento de los recursos invertidos. ABSTRACT Unscheduled stoppages of production ata time when there are deliveries through reviews can have such a negative impact that sometimes lead to complete loss of confidence by the client and thus reducing future business.Companies that wish to achieve adequate levels of competitiveness and performance in the global market of our times, requires not only that its staff are suitably trained and qualified but also managers themselves are clear about the importance of maintenance and know how to defend against surprises often recurrent, lack of adequate preventive maintenance program that allows them to reduce operating costs, improve productivity of their workers and maximize the resources invested.

An Application of Reliability Centered Maintenance Technique for Preventive Maintenance in Refinery Plant

2016 ◽  
Vol 848 ◽  
pp. 244-250
Author(s):  
Itthipol Nakamanuruck ◽  
Sompoap Talabgaew ◽  
Vichai Rungreunganun
Keyword(s):  
Preventive Maintenance ◽  
Risk Level ◽  
Reliability Engineering ◽  
Machine Maintenance ◽  
Machine Failure ◽  
Reliability Centered Maintenance ◽  
Maintenance Program ◽  
Refinery Plant ◽  
Maintenance Plan

This research aims for guidance in improving the productivity of the machines in case study of refinery plant based on the principle of preventive maintenance of machinery applications. This is to increase the availability and improve the reliability and overall equipment effectiveness (OEE) of the machines. From the data collected showed that high cost of maintenance is quite high caused by non-standard maintenance and no prioritization of machine maintenance. Therefore, the researchers proposed a maintenance program developed based on reliability engineering with failure mode and effects analysis (FMEA). FMEA was the first brought to analyze the root causes of machine failure and to evaluate the risk priority number (RPN). The data was performed preventive maintenance plan standardized the maintenance system in order to optimize maintenance task and maximize the efficiency of machinery. After applying FMEA, the result showed that the chance of failure in equipment was very low (1 time in 12 years) after the scheduled maintenance plan and opportunities to detect damage in advance was moderate to high. Therefore, the equipment with a moderate to high risk is likely more damage than the first round of maintenance (5 years). Moreover, the average of the residual risk level analysis of the machine decreased by 59.165% and overall equipment effectiveness (OEE) increased from 92.66% to 98%

Картофелекопатель с ротационной сепарирующей поверхностью

2018 ◽  
Author(s):  
V.M. Alakin ◽  
G.S. Nikitin
Keyword(s):  
Performance Data ◽  
Pilot Studies ◽  
Research Results ◽  
Operating Modes ◽  
Analysis Of Results ◽  
Design Characteristics ◽  
And Performance ◽  
Definition Of

Приведены результаты исследований экспериментального картофелекопателя с ротационной сепарирующей поверхностью. Особое внимание уделяется обоснованию конструктивных параметров и определению рабочих характеристик нового сепарирующего устройства. На основе анализа результатов экспериментальных исследований определены наиболее оптимальные режимы работы экспериментального картофелекопателя.Research results of an experimental potato digger with rotational separating web are published in this article. Special attention is paid to definition of design characteristics and performance data of the new separating device. Admissible operating modes are defined on the basis of the analysis of results of pilot studies of the experimental potato digger.

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