Full Well Corrosion Insight – Case Studies in the Added Value of Electromagnetic Thickness Measurements During Well Interventions

2021 ◽  
Author(s):  
Andrew Imrie ◽  
Maciej Kozlowski ◽  
Omar Torky ◽  
Aditya Arie Wijaya
Keyword(s):  
Case Studies ◽  
Wall Thickness ◽  
Added Value ◽  
Metal Loss ◽  
Outer Diameter ◽  
Metal Thickness ◽  
True Condition ◽  
Pass Through ◽  
External Corrosion ◽  
The Individual

AbstractMonitoring pipe corrosion is one of the critical aspects in the well intervention. Such analysis is used to evaluate and justify any remedial actions, to prolong the longevity of the well. Typical corrosion evaluation methods of tubulars consist of multifinger caliper tools that provide high-resolution measurements of the internal condition of the pipe. Routinely, this data is then analyzed and interpreted with respect to the manufacture's nominal specification for each tubular. However, this requires assumptions on the outer diameter of the tubular may add uncertainty, and incorrectly calculate the true metal thicknesses. This paper will highlight cases where the integration of such tool and electromagnetic (EM) thickness data adds value in discovering the true condition of both the first tubular and outer casings.These case studies demonstrate the use of a multireceiver, multitransmitter electromagnetic (EM) metal thickness tool operating at multiple simultaneous frequencies. It is used to measure the individual wall thickness across multiple strings (up to five) and operates continuously, making measurements in the frequency domain. This tool was combined with a multifinger caliper to provide a complete and efficient single-trip diagnosis of the tubing and casing integrity. The combination of multifinger caliper and EM metal thickness tool results gives both internal and external corrosion as well as metal thickness of first and outer tubular strings.The paper highlights multiple case studies including; i) successfully detecting several areas of metal loss (up to greater than 32%) on the outer string, which correlated to areas of the mobile salt formation, ii) overlapping defects in two tubulars and, iii) cases where a multifinger caliper alone doesn't provide an accurate indication of the true wall thickness. The final case highlights the advantages of integrating multiple tubular integrity tools when determining the condition of the casing wall.Metal thickness tools operating on EM principles benefit from a slim outer diameter design that allows the tools to pass through restrictions which typically would prevent ultrasonic scanning thickness tools. Additionally, EM tools are unaffected by the type of fluid in the wellbore and not affected by any non-ferrous scale buildup that may present in the inside of the tubular wall. Combinability between complementary multifinger caliper technology and EM thickness results in two independent sensors to provide a complete assessment of the well architecture.

Determination of layer-specific mechanical properties of human coronary arteries with nonatherosclerotic intimal thickening and related constitutive modeling

2005 ◽  
Vol 289 (5) ◽  
pp. H2048-H2058 ◽  
Author(s):  
Gerhard A. Holzapfel ◽  
Gerhard Sommer ◽  
Christian T. Gasser ◽  
Peter Regitnig
Keyword(s):  
Mechanical Properties ◽  
Coronary Arteries ◽  
Wall Thickness ◽  
Tissue Type ◽  
Outer Diameter ◽  
Intimal Thickening ◽  
Mechanical Heterogeneity ◽  
Tensile Stresses ◽  
The Media ◽  
The Individual

At autopsy, 13 nonstenotic human left anterior descending coronary arteries [71.5 ± 7.3 (mean ± SD) yr old] were harvested, and related anamnesis was documented. Preconditioned prepared strips ( n = 78) of segments from the midregion of the left anterior descending coronary artery from the individual layers in axial and circumferential directions were subjected to cyclic quasi-static uniaxial tension tests, and ultimate tensile stresses and stretches were documented. The ratio of outer diameter to total wall thickness was 0.189 ± 0.014; ratios of adventitia, media, and intima thickness to total wall thickness were 0.4 ± 0.03, 0.36 ± 0.03, and 0.27 ± 0.02, respectively; axial in situ stretch of 1.044 ± 0.06 decreased with age. Stress-stretch responses for the individual tissues showed pronounced mechanical heterogeneity. The intima is the stiffest layer over the whole deformation domain, whereas the media in the longitudinal direction is the softest. All specimens exhibited small hysteresis and anisotropic and strong nonlinear behavior in both loading directions. The media and intima showed similar ultimate tensile stresses, which are on average three times smaller than ultimate tensile stresses in the adventitia (1,430 ± 604 kPa circumferential and 1,300 ± 692 kPa longitudinal). The ultimate tensile stretches are similar for all tissue layers. A recently proposed constitutive model was extended and used to represent the deformation behavior for each tissue type over the entire loading range. The study showed the need to model nonstenotic human coronary arteries with nonatherosclerotic intimal thickening as a composite structure composed of three solid mechanically relevant layers with different mechanical properties. The intima showed significant thickness, load-bearing capacity, and mechanical strength compared with the media and adventitia.

scholarly journals The Journey of Higher Degree Apprenticeships

2020 ◽  
pp. 243-266
Author(s):  
Claire Hughes ◽  
Gillian Saieva
Keyword(s):  
Case Studies ◽  
Real World ◽  
Strong Support ◽  
Added Value ◽  
Support Structures ◽  
Lessons Learnt ◽  
Learning Journey ◽  
The Individual ◽  
The Impact ◽  
Tripartite Relationship

Abstract Hughes and Saieva outline the history and rationale of the development of Higher Degree Apprenticeships (HDAs) as well as explore how to embed the real world ideologies to innovate curriculum. The necessity of strong support structures across the tripartite relationship to best meet the requirements of both apprentices and employers are also emphasised. The chapter will also review the added value that HDAs bring, not only to the individual apprentices, but to the organisations too, with the use of case studies and feedback from employers on the impact that the apprentice’s work-based learning journey. Reflections are provided on the lessons learnt so far and the chapter presents some of the main areas for consideration.

Introduction: The Translation History of Virgil

2018 ◽  
Author(s):  
Susanna Braund ◽  
Zara Martirosova Torlone
Keyword(s):  
Case Studies ◽  
Large Collection ◽  
The World ◽  
History Of ◽  
The Individual

The introduction describes the broad landscape of translation of Virgil from both the theoretical and the practical perspectives. It then explains the genesis of the volume and indicates how the individual chapters, each one of which is summarized, fit into the complex tapestry of Virgilian translation activity through the centuries and across the world. The volume editors indicate points of connection between the chapters in order to render the whole greater than the sum of its parts. Braund and Torlone emphasize that a project such as this could look like a (rather large) collection of case studies; they therefore consider it important to extrapolate larger phenomena from the specifics presented here

scholarly journals Towards Manufacturing of Ultrafine-Laminated Structures in Metallic Tubes by Accumulative Extrusion Bonding

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 389
Author(s):  
Matthew R. Standley ◽  
Marko Knezevic
Keyword(s):  
Solid State ◽  
Wall Thickness ◽  
Complex Geometry ◽  
Tube Wall ◽  
Film Theory ◽  
Radial Strain ◽  
Surface Preparation ◽  
Grain Structure ◽  
Outer Diameter ◽  
Laminated Structures

A severe plastic deformation process, termed accumulative extrusion bonding (AEB), is conceived to steady-state bond metals in the form of multilayered tubes. It is shown that AEB can facilitate bonding of metals in their solid-state, like the process of accumulative roll bonding (ARB). The AEB steps involve iterative extrusion, cutting, expanding, restacking, and annealing. As the process is iterated, the laminated structure layer thicknesses decrease within the tube wall, while the tube wall thickness and outer diameter remain constant. Multilayered bimetallic tubes with approximately 2 mm wall thickness and 25.25 mm outer diameter of copper-aluminum are produced at 52% radial strain per extrusion pass to contain eight layers. Furthermore, tubes of copper-copper are produced at 52% and 68% strain to contain two layers. The amount of bonding at the metal-to-metal interfaces and grain structure are measured using optical microscopy. After detailed examination, only the copper-copper bimetal deformed to 68% strain is found bonded. The yield strength of the copper-copper tube extruded at 68% improves from 83 MPa to 481 MPa; a 480% increase. Surface preparation, as described by the thin film theory, and the amount of deformation imposed per extrusion pass are identified and discussed as key contributors to enact successful metal-to-metal bonding at the interface. Unlike in ARB, bonding in AEB does not occur at ~50% strain revealing the significant role of more complex geometry of tubes relative to sheets in solid-state bonding.

scholarly journals The face of the other: the particular versus the individual

2017 ◽  
Vol 12 (2) ◽  
pp. 289-313
Author(s):  
Claire Farago
Keyword(s):  
Latin America ◽  
Puerto Rican ◽  
Case Studies ◽  
New Spain ◽  
The Other ◽  
Upper Class ◽  
European Culture ◽  
The Face ◽  
The Individual ◽  
Ethnographic Image

Abstract Five interrelated case studies from the sixteenth to the twentieth centuries develop the dynamic contrast between portraiture and pictorial genres newly invented in and about Latin America that do not represent their subjects as individuals despite the descriptive focus on the particular. From Jean de Léry’s genre-defining proto-ethnographic text (1578) about the Tupinamba of Brazil to the treatment of the Creole upper class in New Spain as persons whose individuality deserves to be memorialized in contrast to the Mestizaje, African, and Indian underclass objectified as types deserving of scientific study, hierarchical distinctions between portraiture and ethnographic images can be framed in historical terms around the Aristotelian categories of the universal, the individual, and the particular. There are also some intriguing examples that destabilize these inherited distinctions, such as Puerto Rican artist José Campeche’s disturbing and poignant image of a deformed child, Juan Pantaléon Aviles, 1808; and an imaginary portrait of Moctezuma II, c. 1697, based on an ethnographic image, attributed to the leading Mexican painter Antonio Rodriguez. These anomalies serve to focus the study on the hegemonic position accorded to the viewing subject as actually precarious and unstable, always ripe for reinterpretation at the receiving end of European culture.

scholarly journals Development of the cardinality principle in Macedonian preschool children

Psihologija ◽  
2009 ◽  
Vol 42 (4) ◽  
pp. 459-475 ◽  
Author(s):  
Ana Nikoloska
Keyword(s):  
Preschool Children ◽  
Kindergarten Children ◽  
Pass Through ◽  
The Individual

Cardinality principle refers to the fact that the last number tag used in counting determines the cardinality of a set. Macedonian kindergarten children were tested with the give-a-number task for understanding of this principle. It was found that Macedonian children, unlike their western counterparts, pass through an additional stage, 5-knowers, before they master the cardinality principle. Also, the age at which they pass through the individual stages is somewhat higher than the age of children coming from western samples. Possible explanations are offered and discussed.

scholarly journals Seasonal changes of biological condition and reproductive cycle of hampback shrimp Pandalus hypsinotus (Caridea, Pandalidae) in the Tatar Strait

2021 ◽  
Vol 201 (3) ◽  
pp. 547-560
Author(s):  
D. N. Yuriev ◽  
G. V. Zhukovskaya
Keyword(s):  
Reproductive Cycle ◽  
Japan Sea ◽  
Biological Condition ◽  
Tatar Strait ◽  
Stage Of Development ◽  
Long Time ◽  
Pass Through ◽  
The Individual ◽  
Almost All ◽  
Trawl Catches

Research and commercial trawl catches of humpback shrimp Pandalus hypsinotus from the Tatar Strait (Japan Sea) in 2004–2020 were investigated, with bioanalysis of about 45 thousand specimens. Average timing of group molting, spawning, and eggs laying are determined, terms of gonads and eggs development are estimated. Prespawning and molting of the females occur between January-April, with the peaks in early February and middle February, respectively. All oviparous females have 30–40 days to lay eggs, and molt during 50–55 days; the peak of the eggs laying occurs in late June. The males molt in July-August, afterwards the largest individuals change gender and new intersexes are formed. The males have the second molting in October-December, with the peak in late November. In January, after finish of the males molting, a new annual reproduction cycle starts from the prespawning molting of females. Both vitellogenesis and embryogenesis are observed through the year, though females with developing gonads prevail from August to January (because of a long time span between winter and summer moltings while the egg carrying continued 15 months) but oviparous females — from February to July. The individual reproductive cycle of Pandalus hypsinotus in the Tatar Strait lasts 24 months, with 9 months of vitellogenesis (quick growth of gonads) and 15 months of embryogenesis. During the 2-year reproductive cycle, most of females pass through the following stages: i) gonads development (just after eggs laying) when almost all oviparous females (up to 95 % in May) have green gonads under carapace that corresponds to the stage of development «eggs laid — gonads weakly developed»; ii) summer molting from August when females lose hairs on pleopods and the gonads growth accelerates; iii) respawning in January-March (together with the firstly spawning intersexes, with slight delay of the latter); iv) initial developing of eggs during summer; v) stage of «eyed eggs» from December to March; and vi) eggs laying and molting from late March to late May; then the 2-year reproductive cycle repeats.

scholarly journals Land-sea interactions: case studies from the Baltic Sea Region

2021 ◽  
Vol 129 ◽  
pp. 08013
Author(s):  
Leila Neimane
Keyword(s):  
Baltic Sea ◽  
Case Studies ◽  
Environmental Law ◽  
Value Added ◽  
Added Value ◽  
Constructive Method ◽  
The Baltic Sea ◽  
Baltic Sea Region ◽  
Blue Economy ◽  
The Baltic

Research background: Nowadays, mainstream discussions on maritime spatial planning (MSP) are tightly intertwined with the discourse on governance for land-sea interactions or interface (LSI), using multi-scalar and cross-sectoral governance systems. At the same time, principles with legal rank need to be respected and applied in both MSP and LSI and their respective governance structures while putting coastal communities at the centre and taking into consideration the process of “maritimisation.” In combination, these factors contribute to augmenting the pressure of competing uses both on land and sea in the frame of the Blue Economy. As an exemplary forerunner in the field of MSP, the Baltic Sea Region (BSR) and its case studies can provide a useful insight in this respect. Purpose of the article: The aim is to identify and integrate the principles with legal rank of Effective Governance for sustainable development to be implemented through different LSI governance perspectives and in the framework of MSP and the Blue Economy, providing concise guidance as to their application through BSR case studies. Methods: Preparation of this article involves applying traditional legal research methods (analysis and synthesis) and the results of maritime spatial plans and practical examples of pilot projects. Analysis includes the following techniques: descriptive, historical, special analytical and dogmatically comparable, including an analytical perspective of transnational environmental law. Synthesis is applied through the legally constructive method. Findings & Value added: Based on conclusions and lessons learned from BSR case studies, the article offers added value by structuring and improving knowledge and providing a basis for further theoretical discussion.

scholarly journals Manufacture of Water Pipe From Clampshell Powder Materials

2018 ◽  
Vol 2 (2) ◽  
pp. 73
Author(s):  
Abdul Rahmansyah ◽  
Zulfikar Zulfikar ◽  
Bobby Umroh
Keyword(s):  
Wall Thickness ◽  
Unsaturated Polyester ◽  
Polymer Composite Material ◽  
Raw Material ◽  
Household Waste ◽  
Thickness Variation ◽  
Powder Materials ◽  
Outer Diameter ◽  
Water Pipe ◽  
Water Pipes

<h1>In general, household waste water pipelines use plastic pipes of PVC type that are not environmentally friendly and are relatively expensive. Therefore, this research will design molds and manufacture of composite pipes using raw materials of clampshell powder. The raw material used is clampshell powder with the composition of MgO and CaO compounds which is about 22.28% and 66.70%. The mixture of materials used consisted of clampshell powder with a size of 40 mesh, catalyst, and unsaturated polyester resin as a matrix. The objective of this study is manufacture of water pipes made from polymer composites reinforced by clampshell powder. Composite pipe manufacturing is carried out using the casting method. Pipe molds are made of stainless steel with a diameter of 40.46 mm (1.6 in) and an outer diameter of 50.8 mm (2 in). This mold size follows SNI 06-0084-2002 standards. The results of the study, water pipes from polymer composite material reinforced by clampshell powder with an inner diameter size of 40.64 mm and varying outside diameter. This variation depends on the composition of the clampshell powder in composite materials. The greater the clampshell powder composition, the more easily the maximum pipe wall thickness can be obtained. The average wall thickness variation is 3.35 mm. This variation is still included in the polymer water pipe requirements, which is a minimum of 2 mm.</h1>

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