The Arctic Ship Shape Platform for Well Maintenance, Survey and Workover

2014 ◽  
Author(s):  
Sergey V. Verbitsky ◽  
Alexey A. Agafonov ◽  
Eduard N. Fomitchyov ◽  
Maksim V. Kovalev ◽  
Irina G. Chesnokova ◽  
...  
Keyword(s):  
Production Systems ◽  
Cost Effective ◽  
The Arctic ◽  
Research Centre ◽  
First Year ◽  
Arctic Conditions ◽  
Broken Ice ◽  
Ice Conditions ◽  
Drilling Rigs ◽  
The Cost

The conceptual design of floating ship shape platform for well maintenance, survey and workover in prospective fields of Russian Arctic and Sakhalin Island shelf (further The platform) was developed by Krylov State Research Centre specialists with the assistance of CDB “Korall”. The platform under design intended for operation in the Arctic conditions and designed to resist the ice formations such as continuous thin first-year ice and broken ice being the first one in the world practice. The form and chosen hull ice strengthening class allow ensuring safe operation in the mentioned ice conditions. The main purpose for development of the platform was to minimize the offshore wells downtime providing the cost effective way for maintenance of subsea production systems comparing with floating drilling rigs and drilling vessels that takes a significant investment. The economic assessments have shown that operation of such platform will cost two to three times less than renting of a rig or drillship. Having the working deck space of about 1,000 m2 and the ability to download a variety of equipment the platform can perform a variety of testing and wells repairing procedures both for underwater wellhead and for wells operated on fixed platforms.

scholarly journals Current methods of subsea production systems survey in the conditions of the Arctic region

2021 ◽  
Vol 1201 (1) ◽  
pp. 012055
Author(s):  
E Smirnov ◽  
U Kharchenko
Keyword(s):  
Production Systems ◽  
Arctic Region ◽  
The Arctic ◽  
Ice Conditions ◽  
Inspection And Maintenance ◽  
Eastern Shelf ◽  
Far Eastern ◽  
Ice Period ◽  
The Arctic Region

Abstract The development of deposits in the Arctic region and the Far Eastern shelf of Russia is complicated by the presence of ice conditions. The duration of the ice period can vary from 5 up to 9 months, during which the underwater equipment of the field is inaccessible for inspection and repair. This work discusses the methods of inspection and maintenance of subsea production systems that can be used in the development of Arctic deposits.

scholarly journals Methodology for Evaluation and Development of Refurbishment Scenarios for Multi-Story Apartment Buildings, Applied to Two Buildings in Denmark and Switzerland

Buildings ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 102
Author(s):  
Yovko Ivanov Antonov ◽  
Per Heiselberg ◽  
Flourentzos Flourentzou ◽  
Michal Zbigniew Pomianowski
Keyword(s):  
Cost Effectiveness ◽  
Life Cycle Cost ◽  
Production Systems ◽  
Evaluation Criteria ◽  
Cost Effective ◽  
Assessment Method ◽  
Literature Study ◽  
Building Projects ◽  
Cost Calculations ◽  
The Cost

Renovation of existing buildings is an indispensable part of achieving European efficiency and environmental targets. This paper applies different assessment methodologies to find optimal renovation, given different evaluation criteria. The performed literature study identifies the cost-optimal methodology employing Life Cycle Cost (LCC) calculation as one of the most common assessment methods. This paper proposes a new renovation assessment method targeted to the early design phases of specific building projects. The method has a simple structure, and can be used as a roadmap of necessary activities for obtaining solid building knowledge and required energy and cost calculations. The methodology is based on linking economic and energy efficiency parameters into defined cost-effective value, calculated for all investigated renovation actions. The cost-effectiveness value is used for ranking and selecting the most appropriate single renovation actions to form renovation packages, which can be further examined in detail (for example, with LCC). To demonstrate the method, evaluate the strengths, and identify the weaknesses, it is applied to case study buildings in Denmark and Switzerland. The results show that, in the initial stage, the proposed cost-effectiveness representation can be used successfully to compare and evaluate different envelope elements and systems. Cost-effectiveness also provides rational results on a package level. Further work is still required in the area of evaluation of energy supply and renewable energy production systems.

Peculiarities of Multi-Legged Platform Operation in Ice Condition

2014 ◽  
Author(s):  
Evgeny Karulin ◽  
Marina Karulina
Keyword(s):  
Mutual Influence ◽  
Experimental Studies ◽  
Vertical Axis ◽  
Research Centre ◽  
Interaction Processes ◽  
Ice Drift ◽  
Ice Concentration ◽  
Broken Ice ◽  
Ice Conditions ◽  
Ice Floes

A usage of multi-legged structures in ice conditions involves some peculiarities that should be taken into account both while designing the platform and while planning technological operations nearby it. In 2010–2013 a range of theoretical and experimental studies were performed at the Krylov State Research Centre, St. Petersburg, Russia. The work aimed to investigate main peculiarities of multi-legged structure interaction with ice, such as 1). mutual influence on ice action on each leg, 2) jamming of the inner space between legs and blocking the space between the front legs with ice floes, and 3) arisen yaw moments about the platform vertical axis due to unsymmetrical ice action on the legs. Three series of model tests with various multi-legged structures models were carried out in the Ice Basin. The presented in the paper main results show effect of key parameters on the interaction processes and on the ice action. During the tests the following parameters were varying: distance between the legs, ice drift speed and direction, broken ice concentration and the ice pieces size. Also, the paper contains results of numerical simulations of some tested scenarios in broken ice conditions. The numerical model is based on discrete element method, and it enables to extend a range of the investigations.

Advanced directional CwD system pushes integration envelope to elevate efficiencies and reduce costs

2017 ◽  
Vol 57 (2) ◽  
pp. 676
Author(s):  
Geertjan van Og ◽  
Jeroen Burgerhout
Keyword(s):  
Cost Effective ◽  
Full Potential ◽  
Directional Drilling ◽  
Seamless Integration ◽  
Drilling Technology ◽  
Bottom Hole Assembly ◽  
Level 3 ◽  
Drilling Rigs ◽  
The Cost ◽  
Casing Drilling

The evolution of casing while drilling (CwD) illustrates the economic, efficiency and health, safety and environment benefits achievable with the seamless integration of downhole tools and surface drilling equipment. However, several technology gaps have restricted CwD from reaching its full potential to optimise the well construction process. This paper describes the integrated development and application of a retrievable Enhanced Casing Installation (ECI) system, engineered to take directional (Level 3) casing drilling technology to another level and further expand the functionality of both specialised and standard land drilling rigs. The system, which enables directional drilling with composite casing and standard mud motors, differs from typical Level 3 CwD methodologies in that the composite option allows bottom hole assembly (BHA) placement inside the shoetrack, thus helping reduce vibrations and wear on the reamer and other downhole tools. Along with increased well stability and allowing simultaneous logging/measuring while drilling, the ECI device is configured with a comparably lightweight BHA, requiring fewer components, such as jars and roller reamers, making it easily retrievable with cable. As discussed, the cost-effective integration of downhole and surface equipment is clearly reflected in the capacity to rerun the retrieved bit and reamer – a marked difference between the sacrificial bits required for the commonly used Level 2 (vertical) CwD technique. Moreover, the authors will present results of a specialised test stand evaluation and subsequent field trial, where the system was integrated on a fit-for-purpose rig and used for casing drilling at a 45° angle with the BHA pulled intact from 1800 m MD.

scholarly journals COVID-19 Vaccination Scenarios: A Cost-Effectiveness Analysis for Turkey

Vaccines ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 399
Author(s):  
Arnold Hagens ◽  
Ahmet Çağkan İnkaya ◽  
Kasirga Yildirak ◽  
Mesut Sancar ◽  
Jurjen van der Schans ◽  
...  
Keyword(s):  
Cost Effectiveness ◽  
Cost Savings ◽  
Cost Effective ◽  
Incremental Cost Effectiveness Ratio ◽  
Vaccine Uptake ◽  
First Year ◽  
Cost Effectiveness Ratio ◽  
Scenario Analyses ◽  
Effectiveness Analysis ◽  
The Cost

As of March 2021, COVID-19 has claimed the lives of more than 2.7 million people worldwide. Vaccination has started in most countries around the world. In this study, we estimated the cost-effectiveness of strategies for COVID-19 vaccination for Turkey compared to a baseline in the absence of vaccination and imposed measures by using an enhanced SIRD (Susceptible, Infectious, Recovered, Death) model and various scenarios for the first year after vaccination. The results showed that vaccination is cost-effective from a health care perspective, with an incremental cost-effectiveness ratio (ICER) of 511 USD/QALY and 1045 USD/QALY if vaccine effectiveness on transmission is equal or reduced to only 50% of effectiveness on disease, respectively, at the 90% baseline effectiveness of the vaccine. From a societal perspective, cost savings were estimated for both scenarios. Other results further showed that the minimum required vaccine uptake to be cost-effective would be at least 30%. Sensitivity and scenario analyses, as well as the iso-ICER curves, showed that the results were quite robust and that major changes in cost-effectiveness outcomes cannot be expected. We can conclude that COVID-19 vaccination in Turkey is highly cost-effective or even cost-saving.

scholarly journals Reducing Antimicrobial Use and Dependence in Livestock Production Systems: A Social and Economic Sciences Perspective on an Interdisciplinary Approach

2021 ◽  
Vol 8 ◽  
Author(s):  
Fanny Baudoin ◽  
Henk Hogeveen ◽  
Erwin Wauters
Keyword(s):  
Behavioral Change ◽  
Production Systems ◽  
Interdisciplinary Approach ◽  
Cost Effective ◽  
Livestock Production ◽  
Antimicrobial Use ◽  
Post Evaluation ◽  
Ex Post ◽  
The Cost ◽  
Effective Assessment

Objective: In livestock production, antimicrobial resistance (AMR) is considered an externality as it is the undesired result of preventive and curative antimicrobial use. To address this biosocial issue, our objective is to present an approach based on interdisciplinary research to develop strategies and policies that aim to contain AMR.Method: To do so, we addressed three fundamental questions on which control policies and strategies for agricultural pollution problems are centered in the light of AMR. To ensure the technical, economic, behavioral and political feasibility of the developed measures, we demonstrated the usefulness of systemic approaches to define who, what and how to target by considering the complexity in which the ultimate decision-maker is embedded. We then define how voluntary or compulsory behavioral change can be achieved via five routes, introducing a clear taxonomy for AMR Interventions. Finally, we present three criteria for ex-ante analysis and ex-post evaluation of policies and strategies.Conclusion: Interdisciplinary systemic approaches enable the development of AMR policies and strategies that are technically, politically, economically and, last but not least, behaviorally feasible by allowing the identification of (a) all actors influencing AMU in livestock production, (b) power relations between these actors, (c) adequate regulatory and intervention bases, (d) what behavioral change strategy to use, (e) whom should implement this, as well as the cost-effective assessment of combinations of interventions. Unfortunately, AMR policies and strategies are often investigated within different disciplines and not in a holistic and systemic way, which is why we advocate for more interdisciplinary work and discuss opportunities for further research.

Jackup Designed for Optimum Operational Time in Ice Conditions

2012 ◽  
Author(s):  
Ove T. Gudmestad
Keyword(s):  
Ice Cover ◽  
The Arctic ◽  
Shallow Waters ◽  
Current Load ◽  
Fall Season ◽  
Arctic Conditions ◽  
Ice Conditions ◽  
Drifting Ice ◽  
Ice Pressure ◽  
Operational Time

There is at present a large interest in exploration for hydrocarbons in the Arctic. In shallow waters, up to, say, 70m, jackups are utilized outside the ice season, while there is a wish to extend the season when the jackups can be on site. We will report on an attempt to extend the operational season to earlier installation and later decommissioning than possible with present jackup designs for ice conditions. The installation of the jackup can take place after the ice cover has cleared sufficiently for the jackup to be maneuvered to site. It should be noted that remaining drifting ice ridges may represent a hazard as the drift of these into the jackup legs can damage the legs. The situation is particularly vulnerable when waves or strong currents cause the remaining of the ridges to impact with the jackup legs. During the operational season the jackup will operate in conventional mode. This phase should NOT been forgotten in the design as the wave and current load on the jackup might be higher than the ice pressure. Towards the end of the drilling season and prior to ice aggregation, the operator of a conventional jackup rig will become very cautious of the requirement to move the jackup out of the ice cover in due time before the sea freezes up and the jackup could get stuck in the ice cover. It should be noted that a jackup frozen into the ice cover and susceptible to loads from drifting ice sheet and ice ridges might collapse. Should the situation occur that the jackup be frozen into the ice cover, it would be necessary to call for costly ice breaker assistance to free the jackup. A jackup that could stay in the ice for a longer period in the fall season would extend the drilling season considerably. In the case such design be considered, the strength of the foundation should be checked to avoid loads that will exceed the foundation capacity of the mud mats. We will in this paper in particular discuss how we can deal with the problem of the requirement for an extended drilling season. The paper covers some of the main issues that are governing for the design of a jackup for arctic conditions. We will in particular cover the issue of leaving the offshore location safely as late as possible when ice has started to form. In this situation traditional jackups have problems and could need the very costly assistance of icebreakers. Other important issues that are not covered are the behavior of the jacket in ice. It should, however, be noted that the jackup is designed to leave the location prior to the ice situation becoming unmanageable.

scholarly journals An assessment of hydrates inhibition in deepwater production systems using low-dosage hydrate inhibitor and monoethylene glycol

2019 ◽  
Vol 10 (3) ◽  
pp. 1169-1182 ◽  
Author(s):  
Ndubuisi U. Okereke ◽  
Pius E. Edet ◽  
Yahaya D. Baba ◽  
Nkemakolam C. Izuwa ◽  
Sunday Kanshio ◽  
...  
Keyword(s):  
Production Systems ◽  
Cost Effective ◽  
Integrated Production ◽  
Long Run ◽  
Formation Of Hydrates ◽  
The Cost ◽  
Monoethylene Glycol ◽  
Production Modelling ◽  
Low Dosage ◽  
Flow Stream

AbstractIn this study, a deepwater pipeline-riser system that experienced hydrates was modelled in MAXIMUS 6.20 (an integrated production modelling tool) to understand, predict and mitigate hydrates formation in typical deepwater system. Highlights of the results from this study suggest that the injection of low-dosage hydrate inhibitors (LDHIs) into the hydrate-forming structures within the multiphase flow stream disperses the hydrates particles in an irregular manner and subsequently decreases the nucleation rate of the hydrate and prevents the formation of hydrates. This study found that the cost of using monoethylene glycol was significantly higher than that of LDHI by over $500/day although low-dosage hydrate inhibitors have initial relatively high CAPEX. In the long run, its OPEX is relatively low, making it cost-effective for hydrate inhibition in deepwater scenarios.

Risk Analysis for Arctic Offshore Operations

1986 ◽  
Vol 23 (02) ◽  
pp. 123-130
Author(s):  
Stephen Slomski ◽  
Vitoon Vivatrat
Keyword(s):  
Risk Analysis ◽  
The Arctic ◽  
Contingency Planning ◽  
Ice Thickness ◽  
First Year ◽  
Probability Of Success ◽  
Ice Conditions ◽  
Drilling Unit ◽  
Arctic Ice ◽  
Fixed Structure

The ice conditions in the Beaufort Sea are very variable, particularly in the deeper water regions. This variability greatly influences the probability of success or failure of an offshore operation. For example, a summer exploratory program conducted from a floating drilling unit may require a period of 60 to 100 days on station. The success of such a program depends on:the time when the winter ice conditions deteriorate sufficiently for the drilling unit to move on station;the number of summer invasions by the arctic ice pack, forcing the drilling unit to abandon station;the rate at which first-year ice grows to the ice thickness limit of the supporting icebreakers; andthe extent of arctic pack expansion during the fall and early winter. In general, the ice conditions are so variable that, even with good planning, the chance of failure of an offshore operation will not be negligible. Contingency planning for such events is therefore necessary. This paper presents a risk analysis procedure which can greatly benefit the planning of an offshore operation. A floating drilling program and a towing and installation operation for a fixed structure are considered to illustrate the procedure.

scholarly journals Assessment of the role and significance of the cost formation process in the activities of organizations

2020 ◽  
Vol 6 (Extra-C) ◽  
pp. 314-319
Author(s):  
Dmitry A. Gura ◽  
Aleksandr N. Sekisov ◽  
Oksana A. Kuznetsova ◽  
Victoria I. Kalombo Mulamba ◽  
Evgeniya S. Tishchenko
Keyword(s):  
Comparative Analysis ◽  
Production Systems ◽  
Cost Effective ◽  
Production Costs ◽  
Limited Resources ◽  
Economic Activities ◽  
Effective Mechanism ◽  
The Cost ◽  
The Impact

The article presents a comparative analysis of various approaches to the formation of production costs. The study estimates the role of costs in the production and economic activities of companies in a market environment. At the same time, the assessment considered the impact of the problem of limited resources on the activities of production systems, which is possible to solve only with the active use of alternative ways in organizing the functioning of the cost-effective mechanism of enterprises.    

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