Liner Hanger Installation in Challenging Offshore Well Conditions

2016 ◽  
Author(s):  
David Luna ◽  
Roberto Elizalde ◽  
Wantuadi Diwaku
Keyword(s):  
Risk Mitigation ◽  
Lessons Learned ◽  
Target Zone ◽  
Service Companies ◽  
Oil Market ◽  
Working Parameters ◽  
The Right ◽  
Short Time ◽  
Oil Company

ABSTRACT ERD wells are commonly associated with major challenges for installation of casing and liner strings. These wells typically present high torque and drag parameters that jeopardize getting strings to total depth. In an attempt to optimize production, a major oil company in Angola decided to re-enter the study well in early 2016. A sidetrack was opened in the 9 5/8-in. casing, and drilling continued in the 8 ½-in. hole and penetrated the target zone in the highest location. Then a 7-in. production liner was run. To reach the target zone, 5,583 ft of 8 ½-in. hole was drilled and deviations varied from 45° to 87°. This trajectory was a challenge for subsequent running of 7-in. liner. Torque and drag (T&D) models showed liner rotation at total depth (TD) was not possible, and a surge model indicated likelihood of mud losses while running the liner. Liner hanger technologies became a very important phase of well construction, and service companies developed advanced liner hangers to overcome hostile well environments. In this case study, the short time available from the planning to execution phases and the current oil market conditions made it imperative that the right equipment, service, and technology were available in country. To achieve the ideal working parameters and get the liner to bottom, a thorough assessment needed to be performed to ensure risk mitigation. This paper presents summarizes steps considered during planning for the 7-in. liner run including a detailed engineering analysis that enabled the operator to make the best decisions based on the available resources. The paper will also discuss lessons learned and best practices captured during the job that will be used for subsequent liners in similar wells.

scholarly journals DECISION TREE C4.5 ALGORITHM FOR TUITION AID GRANT PROGRAM CLASSIFICATION (CASE STUDY: DEPARTMENT OF INFORMATION SYSTEM, UNIVERSITAS TEKNOKRAT INDONESIA)

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Heni Sulistiani ◽  
Ahmad Ari Aldino
Keyword(s):  
Decision Tree ◽  
Classification Model ◽  
Grant Program ◽  
C4.5 Algorithm ◽  
Long Time ◽  
The Right ◽  
Short Time ◽  
Tuition Fee

In pandemic era, almost everyone struggles for their life. College students are such example. They have difficulty in paying tuition fee to continue their study. Based on this problematic situation, Universitas Teknokrat Indonesia grants the students who have good academic performance with tuition fee aid program. Many variables used for determining the grant made it hard to make a decision in a short time or even takes very long time. To make it easier for management to decide who is the right student to get grant, it needs classification model. The purpose of this study is the classification of grant recipients by using decision tree C4.5 algorithm. That can determine whether a potential student can be accepted as an awardee or not. Then, the results of the classification are validated with ten-fold cross validation with an accuracy, precision and recall with the score of 87 % for all part. It means the model perform quite well to be implemented into system.

scholarly journals The Covid-19 Epidemic, China Containment Contexts, and Risk Mitigation, Public Health Lessons Learned, is it Feasible for Europe & Us

2020 ◽  
pp. 1-2
Author(s):  
Hamid Yahya Hussain ◽  
Keyword(s):  
Public Health ◽  
Health System ◽  
Risk Mitigation ◽  
Mortality Rates ◽  
Lessons Learned ◽  
High Morbidity ◽  
Wuhan City ◽  
City Population ◽  
Short Time ◽  
Complete Collapse

Despite the high morbidity and mortality rates of COVID-19 infection china witnessed during the first two months of 2020, and compared to the short time of the epidemic among Wuhan city population in Hubei territory, the response of the health system to the disaster in this country was significantly effective, despite what seemed clear in the early days that the virus was fierce to the point of conquering the capabilities of the country, and it is so explosive, we all had the feeling that China was on the verge of complete collapse within few weeks.

Design and construction risks in BOT type mega transportation projects

2019 ◽  
Vol 26 (10) ◽  
pp. 2223-2242 ◽  
Author(s):  
Hande Aladağ ◽  
Zeynep Işık
Keyword(s):  
Risk Factors ◽  
Risk Mitigation ◽  
Lessons Learned ◽  
Mitigation Measures ◽  
Occupational Accidents ◽  
Content Type ◽  
Transportation Projects ◽  
Construction Risks ◽  
Design And Construction

Purpose In build-operate-transfer (BOT) transportation projects, design and construction phases are critical in terms of their effect on time and cost overruns. The purpose of this paper is to identify the role of risk factors affecting these phases and their significance level for BOT transportation projects. Design/methodology/approach Design and construction risks were determined and then validated by focus group discussions. Afterwards, an illustrated case study was presented to better understand the effects of determined risks in a BOT mega transportation project. As the last step of the study, the fuzzy analytical hierarchy process method was used to prioritize risk factors. Findings The prominent risk factors were found out as occupational accidents, integration between design and construction phases and excessive design variations. Research limitations/implications Different kinds of BOT transportation projects in different countries might be executed very differently considering specific social, political, economic and other factors. However, the results of the study are important in terms of the specific lessons learned from the case study that can be used as a foundation for developing possible risk mitigation measures. Originality/value Though the risk management of BOT projects has been investigated frequently in the literature, there is a knowledge gap in the quantitative evaluation of risk significance specific to design and construction risks. The prioritization of determined risks with an associated case from a mega transportation project will contribute to the BOT project practitioners about possible challenges in design and construction phases in BOT mega transportation projects.

scholarly journals Overcoming Ethical Challenges in Conducting Research Among Persons With Dementia

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 20-21
Author(s):  
Jeanine Yonashiro Cho ◽  
Elizabeth Avent ◽  
Roberta Peterson ◽  
Laura Mosqueda ◽  
Zachary Gassoumis
Keyword(s):  
Ethical Issues ◽  
Well Being ◽  
Lessons Learned ◽  
Ethical Challenges ◽  
Care Partners ◽  
Moderate Dementia ◽  
Conducting Research ◽  
The Right

Abstract By 2060, the number of older adults with Alzhemier’s Disease or related dementias (ADRD) is expected to encompass approximately 13.9 million Americans. Recognizing this, the federal government has prioritized research on ADRD and their effect on the physical, emotional, and psychological well-being of persons with dementia (PWD). Such research is complicated by disease-associated decline in cognitive and functional capacity among PWDs which can impair participant ability to process and communicate information, potentially increasing their exposure to negative research-related experiences and compromising the accuracy and reliability of provided data. Nevertheless, as a key stakeholder group, PWD should have the right to participate in research on ADRD. This session will present a case study of ethical issues that emerged in an NIH-funded study utilizing mixed-methods to examine caregiving and care dyad relationships between PWD and their care partners over an 18-month follow-up period. Ethical issues examined will include: (1) PWD capacity to consent to research at baseline and (2) during follow-up visits, (3) Obtaining accurate and reliable data from persons with mild to moderate dementia, (4) Assessing PWD distress while engaging in data collection processes, and (5) Reporting of negative caregiving and life experiences, such as elder mistreatment. The discussion of these topics and presentation of lessons learned holds promise for improving research methodology in studies involving PWD and enabling researchers to increase the involvement of persons with mild to moderate dementia in research on ADRD.

If you build it, will they sort it? Compost collection in the academic library learning commons

2016 ◽  
Vol 37 (6/7) ◽  
pp. 340-351 ◽  
Author(s):  
Uta Hussong-Christian
Keyword(s):  
Academic Libraries ◽  
Academic Library ◽  
Lessons Learned ◽  
Sustainable Building ◽  
Content Type ◽  
Learning Commons ◽  
Assessment Techniques ◽  
The Right ◽  
Working Out

Purpose The purpose of this paper is to share one uncommon way that an academic library moved toward more sustainable library operations and to share lessons learned in the implementation of a compost collection program in an academic library. Design/methodology/approach Case study. Findings The right collaboration is critical to successfully implementing a library composting program and challenges like working around supply purchasing hurdles, reducing contamination in the collection bins, and working out appropriate assessment techniques may be encountered. Practical implications Academic libraries can implement compost collections program if the proper infrastructure exists and the appropriate partnerships are established. Social implications Academic libraries can be leaders in sustainable building operations and provide learning opportunities for the entire campus and surrounding community. Originality/value Very little published literature exists on implementing composting program in libraries of any kind. This case study helps to build that body of literature.

Faculty Development: A Stage Model Matched to Blended Learning Maturation

2011 ◽  
Vol 15 (1) ◽  
Author(s):  
Michael L. Fetters ◽  
Tova Garcia Duby
Keyword(s):  
Faculty Development ◽  
Blended Learning ◽  
Lessons Learned ◽  
Technology Enhanced Learning ◽  
Stage Model ◽  
Years Of Experience ◽  
Development Programs ◽  
Curriculum Innovation ◽  
Enhanced Learning

Faculty development programs are critical to the implementation and support of curriculum innovation. In this case study, the authors present lessons learned from ten years of experience in faculty development programs created to support innovation in technology enhanced learning. Stages of curriculum innovation are matched to stages of faculty development, and important lessons for success as well as current challenges are delineated and discussed.

Optimales Layout einer Walderschliessung

2016 ◽  
Vol 167 (5) ◽  
pp. 294-301
Author(s):  
Leo Bont
Keyword(s):  
Road Network ◽  
Spatial Arrangement ◽  
Problem Situation ◽  
Optimal Layout ◽  
Forest Road ◽  
The Road ◽  
Network Cost ◽  
User Friendly ◽  
Short Time

Optimal layout of a forest road network The road network is the backbone of forest management. When creating or redesigning a forest road network, one important question is how to shape the layout, this means to fix the spatial arrangement and the dimensioning standard of the roads. We consider two kinds of layout problems. First, new forest road network in an area without any such development yet, and second, redesign of existing road network for actual requirements. For each problem situation, we will present a method that allows to detect automatically the optimal road and harvesting layout. The method aims to identify a road network that concurrently minimizes the harvesting cost, the road network cost (construction and maintenance) and the hauling cost over the entire life cycle. Ecological issues can be considered as well. The method will be presented and discussed with the help of two case studies. The main benefit of the application of optimization tools consists in an objective-based planning, which allows to check and compare different scenarios and objectives within a short time. The responses coming from the case study regions were highly positive: practitioners suggest to make those methods a standard practice and to further develop the prototype to a user-friendly expert software.

The Calculation of Turbulent Diffusion Coefficients in Aquatic Ecosystems

2019 ◽  
Vol 70 (11) ◽  
pp. 3903-3907
Author(s):  
Galina Marusic ◽  
Valeriu Panaitescu
Keyword(s):  
Transport Equation ◽  
Turbulent Diffusion ◽  
Diffusion Coefficients ◽  
Aquatic Ecosystems ◽  
Specific Area ◽  
Left Bank ◽  
The Right ◽  
Prut River

The paper deals with the issues related to the pollution of aquatic ecosystems. The influence of turbulence on the transport and dispersion of pollutants in the mentioned systems, as well as the calculation of the turbulent diffusion coefficients are studied. A case study on the determination of turbulent diffusion coefficients for some sectors of the Prut River is presented. A new method is proposed for the determination of the turbulent diffusion coefficients in the pollutant transport equation for specific sectors of a river, according to the associated number of P�clet, calculated for each specific area: the left bank, the right bank and the middle of the river.

Radical Subject Acceleration for Gifted Students: One School's Response

2019 ◽  
pp. 29-46
Author(s):  
Kaye Chalwell ◽  
Therese Cumming
Keyword(s):  
Gifted And Talented ◽  
Gifted Students ◽  
Subject Area ◽  
Lessons Learned ◽  
Gifted Student ◽  
Learning Needs ◽  
Mathematically Gifted ◽  
Support Students ◽  
Insight Into

Radical subject acceleration, or moving students through a subject area faster than is typical, including skipping grades, is a widely accepted approach to support students who are gifted and talented. This is done in order to match the student’s cognitive level and learning needs. This case study explored radical subject acceleration for gifted students by focusing on one school’s response to the learning needs of a ten year old mathematically gifted student. It provides insight into the challenges, accommodations and approach to radical subject acceleration in an Australian school. It explored the processes and decisions made to ensure that a gifted student’s learning needs were met and identified salient issues for radical subject acceleration. Lessons learned from this case study may be helpful for schools considering radical acceleration.

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