Gasket Selection and Assembly Criteria for Internal Sealing Manways and Handholes

2013 ◽  
Author(s):  
A. Fitzgerald (Jerry) Waterland
Keyword(s):  
Selection Process ◽  
Worker Safety ◽  
Assembly Process ◽  
Critical Importance ◽  
Equipment Reliability ◽  
Start Up ◽  
Critical Issues

Internal sealing manways, hand-holes, drum doors, etc. present very unique sealing and assembly challenges. Unlike other conventional gasketed connections, the majority of the gasket compression forces are developed during operation, and not during assembly. This creates several critical issues that must be understood and overcome in the original gasket selection process and the assembly itself. Even if considered and addressed in the original gasket selection and assembly process, these internal sealing manways will likely still require a post start-up retorque. The timing of the re-torque is of critical importance in ensuring worker safety and continued equipment reliability and uptime.

Wireline Retrievable ESP Deployment: Observation, Challenges and Intervention

2021 ◽  
Author(s):  
Fadzlan Suhaimin ◽  
Nasir Oritola ◽  
Bo Jun Fang ◽  
Hing Kheong Cheong ◽  
Yung Khiong Chan
Keyword(s):  
High Risk ◽  
Selection Process ◽  
Cost Advantage ◽  
Value Proposition ◽  
Pilot Performance ◽  
Operating Period ◽  
Artificial Lift ◽  
Start Up ◽  
Offshore Field ◽  
Gas Lift

Abstract The Offshore Field X Project comprises of greenfield scope to expand the Waterflood scheme towards delivering the peak production levels similar to those achieved in the 1990s. Although various artificial lift systems have been successfully deployed in Brunei Shell Petroleum, offshore ESP installation, especially on this scale, is a first and a new journey for the company and its Offshore Assets in which gas lift was predominantly the artificial lift method. The first offshore ESP well was only installed and kicked off in 2017 as part of the Field X Project. As wells are located offshore, cost, resources and logistics remain a challenge for well interventions. With a high workover cost associated with conventional ESP change out, a technology trial was embarked upon to install wireline retrievable ESP systems. A total of 4 out of the 22 ESP wells were approved to be installed and completed with wireline retrievable ESP system on a pilot basis. The business goal was to prove the production deferment reduction and cost advantage for a failed ESP replacement. A critical selection process was followed as well as FAT/industry benchmarking in order to land on WRESP decision for the pilot. System installation and commissioning of the wells was completed by June 2019, however a series of start-up problems were encountered, leading to an intervention requirement to rectify 1 well. Job planning for this intervention was not straight forward and was classified as a high-risk job requiring regulator's approval. Rigorous logistics planning, integration of various vendors, detailed workflow analysis, intervention equipment stack up and modifications were among the planning scope conducted. This paper captures details of the deployment value proposition, case success definition and challenges faced in ensuring all the installed WRESPs are up and running to enable the pilot performance proper evaluation. As no full workover has been executed yet due to the limited operating period, a lifecycle comparison between WL retrievable and conventional ESPs has not been done yet. Once sufficient performance data is available, a detailed study will be conducted to assess the performance of the WRESP system. This analysis will then conclude the technology trial and may change the future of ESP wells in BSP and Shell global.

Concurrent Robust Product and Process Design

1999 ◽  
Author(s):  
Lars Lindkvist ◽  
Rikard Söderberg
Keyword(s):  
Process Design ◽  
Evaluation Criteria ◽  
Software Tool ◽  
The Body ◽  
Assembly Process ◽  
Critical Dimensions ◽  
Cad System ◽  
Start Up ◽  
Assembly Evaluation ◽  
Product And Process

Abstract This paper presents a method for assembly evaluation. The method uses two evaluation criteria, robustness and variation analysis, and is supported by a software tool developed by the authors. The robustness evaluation aims at detecting design and assembly solutions that are sensitive to variation and may cause problems during production. Using this method in early product and process design phases helps to find more robust concepts, resulting in shorter production start-up time and better precision. The method’s use is exemplified in a concept study of the assembly process of the door to the body of a (fictitious) jeep. The study shows that the proposed method can be used to obtain an objective comparison between different concepts. This comparison includes both general robustness and the expected variation in the critical dimensions. The results can be used, together with economical and practical aspects, to determine which concept is best suited for the assembly process. The software used is implemented in the MS Windows environment and has an JGES interface that enables the user to import CAD geometry from an arbitrary CAD system. It can perform different types of robustness evaluations as well as traditional variation analyses.

Integrated biogeography and assembly process of planktonic and sedimentary bacterial communities in the Yangtze River

2020 ◽  
Author(s):  
Tang Liu ◽  
Jiawen Wang ◽  
Shufeng Liu ◽  
Qian Chen ◽  
Chunmiao Zheng ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Yangtze River ◽  
Selection Process ◽  
Anthropogenic Impacts ◽  
Spatiotemporal Pattern ◽  
Assembly Process ◽  
The Yangtze River ◽  
Species Sorting ◽  
Biogeographic Patterns ◽  
Water And Sediment

<p>Bacterial communities are essential to the biogeochemical cycle in riverine ecosystems. However, the integrated biogeography and assembly process of planktonic and sedimentary bacterial communities in large rivers is still poorly understood. Here, the study provided the spatiotemporal pattern of bacterial communities in the Yangtze River of 4300 km continuum, which is the largest river in Asia. We found that the taxa in sediments are the main contributors to the bacterial diversity of the river ecosystem since sediments sub-group took 98.8% of the total 38, 904 Operational Taxonomic Units (OTUs) observed in 280 samples. Seasonal differences in bacterial communities were statistically significant in water, whereas bacterial communities in both water and sediment were geographically clustered according to five types of landforms: mountain, foothill, basin, foothill-mountain, and plain. Interestingly, the presence of two huge dams resulted in a drastic fall of bacterial taxa in sediment immediately downstream due to severe riverbed scouring. The integrity of the biogeography was satisfactorily interpreted by the combination of neutral and species sorting perspectives in meta-community theory for bacterial communities in flowing water and sediment. Although deterministic process had dominant influence on assembly processes in water and sediment communities, homogeneous selection was the main contributor in water, while combination of homogeneous selection and variable selection contributed selection process in sediment. In addition, homogenizing dispersal played more important role in community assembly process in sediment than water. Our study fills a gap in understanding of biogeography and assembly process of bacterial communities in one of the world’s largest river and highlights the importance of both planktonic and sedimentary communities to the integrity of bacterial biogeographic patterns in a river subject to varying natural and anthropogenic impacts.</p>

scholarly journals Comment on Zwaan, Etz, Lucas, and Donnellan (2017): Selecting target papers for replication

2018 ◽  
Author(s):  
Anton Kühberger ◽  
Michael Schulte-Mecklenbeck
Keyword(s):  
Selection Process ◽  
Critical Importance ◽  
Selection Of

Randomness in the selection process of the to-be-replicated target papers is of critical importance for replication success or failure. If target papers are chosen due to ease of doing a replication, or because replicators doubt the reported findings, replications are likely to fail. To date, the selection of replication targets is biased.

scholarly journals Assessing SMEs’ Internationalisation Strategies in Action

2020 ◽  
Vol 10 (14) ◽  
pp. 4743
Author(s):  
Francesco Castagna ◽  
Piera Centobelli ◽  
Roberto Cerchione ◽  
Eugenio Oropallo ◽  
Shashi ◽  
...  
Keyword(s):  
Small And Medium Enterprises ◽  
Selection Process ◽  
Research Field ◽  
Future Research ◽  
Research Gaps ◽  
Start Up ◽  
Relevant Field ◽  
Future Research Directions ◽  
Internationalisation Strategies ◽  
Medium Enterprises

In this paper, a structured review was conducted to investigate the internationalisation process of small and medium enterprises (SMEs) to define barriers and enablers and identify research gaps in this relevant field. Data were collected from two databases of scientific peer-reviewed articles (i.e., Scopus and Web of Science). After the selection process, 161 papers focusing on SMEs’ internalisation were analysed using both descriptive and content analysis. The analysis of the results highlights that SMEs’ internalisation is a growing research field, but different research gaps remain to be filled. These gaps concern barriers, impact on performance, models, and theories related to the different phases of the internationalisation process (e.g., start-up, early entrance, international growth). The future research directions identified interesting suggestions and guidelines for future researchers in the field of SMEs internationalisation.

The Method of the Coal Mining Machine Height Control Based on Magneto-Rheological Tactile Reappearance

2010 ◽  
Vol 33 ◽  
pp. 704-708
Author(s):  
Chun Rui Tang ◽  
Can Zhao ◽  
Hua Jun Li
Keyword(s):  
Coal Mining ◽  
Force Feedback ◽  
Control Method ◽  
Worker Safety ◽  
Mining Machine ◽  
Floor Rock ◽  
Height Control ◽  
Equipment Reliability ◽  
Sensing Technology ◽  
Magneto Rheological

Through analyzing height character of the coal mining machine, the method of height control of the coal mining machine based on touch sensing technology of magneto-rheological valve is proposed. The controller exports control signal based on extracting current and speed signals of shearer cutting motor and controls touch sensing force feedback based on magneto-rheological valve. The operator can accurate and duly adjust roller height of the coal mining machine. The result of simulations and experiments show that the method is important to avoid the coal mining machine cutting the roof and floor rock and maintain the roof and floor of the formation face, and extend machine life, improve equipment reliability, protect worker safety, improve coal quality. This structure of control method is simple and easy to achieve which has a certain application foreground.

A MODEL FOR THE TOTAL PRODUCTIVE MANUFACTURING ASSESSMENT AND IMPLEMENTATION

2009 ◽  
Vol 08 (02) ◽  
pp. 117-136 ◽  
Author(s):  
DEVDAS SHETTY ◽  
AHAD ALI ◽  
JOHN J. CHAPDELAINE
Keyword(s):  
Material Flow ◽  
Selection Process ◽  
Value Stream Mapping ◽  
Decision Matrix ◽  
Value Stream ◽  
Equipment Reliability ◽  
Key Characteristics ◽  
Process Failure ◽  
The Status ◽  
Criticality Analysis

This research presents a comprehensive investigation of the implementation of Total Productive Manufacturing (TPM) in major US industries and assesses the status of its implementation. The identification and categorization of the key characteristics of a TPM implementation are developed. An extensive survey was developed and conducted that allows companies to identify how they fit within the TPM philosophy and the way they highlight areas for improvement. Based on the survey, a new methodology to implement TPM was developed. This procedure builds upon traditional TPM procedures and equipment selection tools and further adds non-traditional tools. Value Stream Mapping was added to improve understanding of material flow in the manufacturing process. Failure Mode and Effects Criticality Analysis (FMECA) procedures introduced equipment reliability and probability of failure into the selection process. The comprehensive TPM methodology was demonstrated as a visual tool entitled, TPM Decision Matrix. The tool allows selection tradeoffs of various resources that are available in the industry. The methodology was tested in industry through a TPM implementation. The results showed that the equipment effectiveness in the company has improved by the new TPM results. The results also include several other major recommendations that have significant potential for enhancing factory effectiveness.

Design of a Dual-Modal Signal Progression Model for Urban Arterials Accommodating Heavy Transit and Passenger Car Flows

2019 ◽  
Vol 2673 (10) ◽  
pp. 1-13
Author(s):  
Yao Cheng ◽  
Hyeonmi Kim ◽  
Gang-Len Chang
Keyword(s):  
Passenger Car ◽  
Progression Model ◽  
Geometric Conditions ◽  
Start Up ◽  
Proposed Model ◽  
Critical Issues ◽  
Urban Arterials ◽  
The Cost ◽  
Measures Of Effectiveness ◽  
Optimal Signal

Despite extensive studies aiming at contending with congestion on urban arterials, an effective model to produce optimal signal progression for an arterial experiencing heavy bus and passenger car flows remains unavailable. In response to such needs, this study presents a bandwidth maximization model that can offer concurrent progression to both modes or to a selected mode(s) in a selected direction(s), based on traffic volume, bus ratio, and geometric conditions. To capture the operational features of both modes, the proposed model has effectively taken into account all critical issues that may result in mutual impedance between them, which include the potential blockage by passenger car queues of roadside bus stops, the excessive start-up delays caused by transit vehicles queueing at the intersection stop line, and the reduced travel lanes for progressing flows caused by buses dwelling at roadside stations with limited storage capacity. In addition, by weighting the bandwidths with the passenger volumes by mode and by direction, the proposed model is capable of offering progression only to the mode(s) and the direction(s) for which it is justified from the perspective of maximizing the benefits to all arterial users. The numerical analysis results have confirmed the effectiveness of the proposed model in producing concurrent progression bands for both modes under various realistic constraints and volume levels. Further evaluation with extensive simulation experiments has also demonstrated that the benefits offered by the proposed model will not be at the cost of other measures of effectiveness.

scholarly journals The Selection Process and Criteria of Impact Accelerators. An Exploratory Study

2021 ◽  
Vol 13 (12) ◽  
pp. 6617
Author(s):  
Heiko Butz ◽  
Matthias Jan Mrożewski
Keyword(s):  
Selection Criteria ◽  
Selection Process ◽  
Entrepreneurship Research ◽  
Selection Processes ◽  
Start Up ◽  
Selection Approach ◽  
Research Gap ◽  
Start Ups ◽  
Positive Effect ◽  
Selective Process

Start-up accelerators, a relatively new and competitive type of business incubators, are nowadays considered to be a highly effective way of providing venture support. Start-ups who have been supported through accelerators have an approximately 23% higher survival rate than other new businesses. This positive effect can be explained by the highly selective process accelerators apply when deciding on which venture projects to support. It comes as no surprise that understanding this process and the respective selection criteria is at the core of accelerator/incubator literature within entrepreneurship research. Existing research is however limited to the investigation of commercial accelerators which provide support to start-ups having an economic purpose only. Hence those academic findings cannot be simply extrapolated to accelerators supporting ventures combining economic goals with social and ecological purpose. Given the growing meaning of sustainability entrepreneurship and hence the increasing number of sustainability-oriented accelerators, the above limitation seems to be an important research gap. This paper addresses the above gap by investigating the selection processes and criteria of so-called impact accelerators focusing on the support of start-ups expected to create not only economic outcomes but also positive social and/or environmental impact. Building on existing accelerator literature, we qualitatively investigate the selection processes and criteria of nine European impact accelerators. By comparing our findings with existing research, we identify important differences between the selection approach of commercial and impact accelerators thus contributing to sustainability entrepreneurship research and practice.

scholarly journals APPLICATION OF SPEED AND SEPARATION MONITORING TECHNIQUE AT AUTOMATED ASSEMBLY PROCESS

2021 ◽  
Vol 2021 (2) ◽  
pp. 4420-4423
Author(s):  
MAREK VAGAS ◽  
◽  
ALENA GALAJDOVA ◽  
Keyword(s):  
Automotive Industry ◽  
Technical Specification ◽  
Worker Safety ◽  
Assembly Process ◽  
Ongoing Research ◽  
Safety Issues ◽  
Risk Of Injury ◽  
Operator Fatigue ◽  
Environment Simulation ◽  
Sharing Space

The realization and implementation of a collaborative robotic system in the automotive industry has many advantages in productivity, product quality, and worker ergonomics, but worker safety aspects play a crucial role in these activities. This paper presents the results of ongoing research into developing an automated workplace for an assembly of industrial limit switches based on the cooperation between human and robotic systems. Operating speed and worker-robot separation monitoring methodology (SSM) was used as one of the available methods to reduce the risk of injury according to the technical specification ISO 15066 on collaborative method sharing space with humans. The virtual environment simulation aims to determine the SSM algorithm’s parameters to estimate the minimum protective distance between the robot and the operator. The cooperation between the human and the robot and the safety issues specified by the SSM system assumed operational safety and reduced the operator fatigue during the assembly process.

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