Deep Water And Ultra Deep Water
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. A Choline Chloride-Ethylene Glycol Deep Eutectic Solvent Based on Magnetic Polydopamine with Preconcentration and Determination for Sulfonylurea Herbicides in Water Samples
In this study, a novel deep eutectic solvent (DES) containing choline chloride and ethylene glycol was synthesized, and the magnetic polydopamine (PDA) was modified with this deep eutectic solvent to form Fe3O4@PDA-DES. Fourier transformed infrared spectroscopy, scanning electron microscopy, and vibrating sample magnetometer were used to characterize the pro
J. Braz. Chem. Soc.. Publicado em: 2020-07
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2. Morphology and morphometry of upland lakes over lateritic crust, Serra dos Carajás, southeastern Amazon region
ABSTRACT High-resolution satellite images, digital elevation models, bathymetric and sedimentological surveys coupled with statistical analysis were used to understand the physical environment and discuss their influence on water quality of the five upland lakes of Serra Sul dos Carajás, southeast Amazonia. The lakes have mid-altitude ranges (elevation), ve
An. Acad. Bras. Ciênc.. Publicado em: 17/05/2018
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3. Estudo do comportamento PVT de misturas de metano e fluidos de perfuração base éster / Study of the PVT behavior of methane and ester based drilling fluids mixtures
During conventional drilling operations, it is necessary to maintain the wellbore pressure greater than the reservoir pore pressure, otherwise a kick may occur. If the well control procedure is not effective during the circulation of the formation influx out of the well, a blowout could happen, which is a dangerous event concerning safety and environmental i
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/06/2010
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4. Novo método para estimativa do gradiente de fratura para poços de petróleo
The development of oil wells drilling requires additional cares mainly if the drilling is in offshore ultra deep water with low overburden pressure gradients which cause low fracture gradients and, consequently, difficult the well drilling by the reduction of the operational window. To minimize, in the well planning phases, the difficulties faced by the dril
Publicado em: 2010
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5. Análise dos critérios de estabilidade para projetos de plataformas do tipo monocoluna. / Analysis of the stability criteria of monocolumn type platform design.
To be classified and approved by a classification society, all offshore structures shall be submitted and analyzed according to standard rules. The stability criteria are based on the IMO MODU (International Maritime Organization Mobile Offshore Drilling Units) Code which has reference to almost all types of floating units such as surface, column-stabilized
Publicado em: 2008
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6. Caracterização tectono-estratigráfica da sequência transicional na sub-bacia de Sergipe
This thesis deals with the tectonic-stratigraphic evolution of the Transitional Sequence in the Sergipe Sub-basin (the southern segment of the Sergipe-Alagoas Basin, Northeast Brazil), deposited in the time interval of the upper Alagoas/Aptian stage. Sequence boundaries and higher order internal sequences were identified, as well as the structures that affec
Publicado em: 2008
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7. Estudos anatomicos e ultra-estruturais da organogenese in vitro de Passiflora edulis Sims f. flavicarpa Deg / Anatomy and structural studies of in vitro organogenesis of Passiflora edulis Sims f. flavicarpa Deg
Meristemoids are responsible for the in vitro organogenesis expression. They may be formed from the explant (direct organogenesis) or from callus (indirect organogenesis). Once in vitro organogenesis is a prerequisite for developing micropropagation strategies and genetic transformation in plants, the ultrastructural analysis of the cells involved in such re
Publicado em: 2005
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8. ANÁLISE DO COMPORTAMENTO DA TEMPERATURA EM SISTEMAS DE PRODUÇÃO DE PETRÓLEO: COMPARAÇÃO ENTRE COMPLETAÇÃO SECA E MOLHADA / TEMPERATURE BEHAVIOR ANALYSIS OF OIL PRODUCTION SYSTEMS: DRY AND WET COMPLETION COMPARISON
Around 50% of the Brazilian reserves of hydrocarbons are located in the continental platform in water depths with more than one thousand meters. The freezing temperatures of the sea bottom make problems related to oil production, even more critical. However, the flow assurance challenges are not the only obstacles for the oil production in ultra-deep waters.
Publicado em: 2004
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9. Estudo do controle de poços em operações de perfuração em aguas profundas e ultra profundas
Well control has always been a very important issue in the oi! and gas exploitation business, since it involves money savings, people safety and environment threatening. The advancement of the exploration frontiers from onshore to offshore fields, particularly, deep and ultra-deep waters, has increased even more the relevance of kick control and blowout prev
Publicado em: 2002
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10. A NUMERICAL AND EXPERIMENTAL STUDY TO EVALUATE PIPE-SOIL INTERACTION / UM ESTUDO NUMÉRICO E EXPERIMENTAL PARA A AVALIAÇÃO DA INTERAÇÃO SOLO - DUTO
The necessity for offshore oil exploration to reach greater depths, pushed the demands for semi-submersible exploration and production units. Presently, steel catenary risers (SCR) appear to be the best recommended technical solution for oil and gas exploration.Concerning to the fatigue analysis there are two critical stress points to be considered: close to
Publicado em: 2001
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11. Avaliação da adaptação à dentina de vários agentes de proteção com ou sem sistemarestaurador adesivo, em função de diferentes tratamentos da superfície dentinária. / Evaluation of the marginal finishing of cavity preparations in relation to different instrumentation methods.
The present study evaluated the length and width of interface gaps between dentin and the following lining materials: chemically cured Dycal Advanced Formula II and light cured Prisma VLC Dycal and Ultra-Blend® plus calcium hydroxide bases; chemically cured Ketac Bond and light cured Vitrebond glass ionomer cements. Dentin cavities prepared in human teeth w
Publicado em: 2000
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12. Obtenção e caracterização de filtros de profundidade de crisotilas brasileiras
Chrysotile asbestos has been used in the manufacture of deep filtration filters since longo, owing to its high specific surface area and its positive surface charge. However, as in the case of other natural materials, the performance of the filters depends very strongly on the chrysotile origin. Filters obtained from brazilian asbestos have considerabily poo
Publicado em: 1989