Horizontal Drilling
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. Applied anatomy of round window and adjacent structures of tympanum related to cochlear implantation
Resumo Introdução: Vários aspectos da anatomia da janela redonda e da anatomia da caixa timpânica posterior são relevantes, devido a suas implicações no desenho dos eletrodos para o implante coclear e na visibilidade da janela redonda através do recesso facial. Informações prévias sobre possíveis variações anatômicas da janela redonda e suas
Braz. j. otorhinolaryngol.. Publicado em: 29/08/2019
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2. Análise experimental da tensão de cisalhamento mínima para suspensão de partículas em um leito horizontal
A remoção eficiente de cascalhos ainda é um desafio na perfuração de poços para produção de óleo e gás. O ponto crítico corresponde ao estágio horizontal da perfuração que intrinsecamente tende a formar um leito de partículas sedimentadas na parte inferior do poço em perfuração. A erosão desse leito de cascalhos oriundos do solo perfurado
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/12/2009
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3. Evaluation of the gradient precision of the horizontal directional drilling technique for the installation of gravity sewers / Avaliação da precisão da declividade da técnica de perfuração direcional horizontal para instalações de redes de esgoto
The present work is focused on the horizontal directional drilling (HDD) method to install gravity sewers. The results of different techniques are described intending to meet the demands of gradient. Therefore, 4 experimental pilot bores were drilled simulating a section of those structures extending 30 m with HDPE pipelines of 125 mm external diameter. Thos
Publicado em: 2008
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4. Well control modeling : a finite difference approach / Modelagem do controle de poços por diferenças finitas
The oil field industry has been drilling in different scenarios, subjected to high pressures and high temperatures in deep wells located in deep and ultradeep waters. The well control study in these scenarios demands a kick simulator capable to do precise predictions of the pressure behavior inside the wellbore during a kick situation. Regarding this scenari
Publicado em: 2008
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5. Avaliação da perda de carga e do fator de atrito no escoamento de fluidos de perfuração em geometrias circular e anulares concêntricos / Load loss and friction factor in the disposal of drilling fluids in circular geometry and concentric rings
The constant search for new technologies of drilling oil wells has reinforced the research and development of drilling fluids and the specific study of their disposal, particularly with regard to the load loss caused by the different geometries. Within this context, this study focused on the load loss and friction factor in the disposal of the drilling fluid
Publicado em: 2008
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6. Modelo para anÃlise de tensÃes gravitacionais a partir de caracterÃsticas geomecÃnicas dos maciÃos rochosos
Stresses acting on rock mass can be either of natural origin or induced. The natural origin stresses, or in situ stresses, are divided into: gravitational, tectonics, waste and land. The induced stresses are caused by the action of engineering works such as excavation or construction. These works alter the balance of the state of pre-existing stresses in the
Publicado em: 2008
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7. CFD predictions of drilling fluid velocity and pressure profiles in laminar helical flow
Fluid flow in annular spaces has received a lot of attention from oil industries, both in drilling operations and in petroleum artificial rising. In this work, through numerical simulation using the computational fluid dynamics (CFD) technique, the flow of non-Newtonian fluids through the annuli formed by two tubes in concentric and eccentric arrangements of
Brazilian Journal of Chemical Engineering. Publicado em: 2007-12
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8. Estudo sobre a adsorção do fluido de perfuração salgado contendo polímeros sobre SiO2
Polysaccharide-based drilling fluids have been often applied in horizontal wells of petroleum reservoirs in Campos, Rio de Janeiro. The present study aimed to understand the mechanism of adsorption and desorption of the drill-in fluid, xanthan, modified starch and lubricant on SiO2 by means of ellipsometry. The effect of pH and brine on the mean thickness (D
Química Nova. Publicado em: 2007-08
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9. MODELAGEM PARA O ESCOAMENTO TRANSIENTE HORIZONTAL E QUASE HORIZONTAL NA PERFURAÇÃO DE POÇOS DE PETRÓLEO / TRANSIENT MODELING OF HORIZONTAL AND NEAR HORIZONTAL FOR WELLBORE DRILLING
Dentre os custos considerados na explotação de um campo de petróleo, os de perfuração constituem uma parcela significativa do total. Dentro deste cenário, devemos estar atentos à remoção dos cascalhos gerados pela perfuração, também referido como limpeza de poços. Esta operação é, ainda hoje, um tema crítico na perfuração de poços de alta
Publicado em: 2006
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10. Analise da influencia da angulação horizontal e da compressão de imagens digitais no diagnostico de cavidades proximais
the main purpose on this work was to evaluate, subjectively, the influence of radiographic image compression on the diagnostic of incipient proximal lesions created artificially. Extracted teeth were submitted to artificial drilling in its proximal surfaces, with diamond burs, so they were submitted to radiographic incidences utilizing the DenOptix radiograp
Publicado em: 2006
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11. Escolamento laminar de líquidos não-newtonianos em seções anulares: estudos de CFD e abordagem experimental
The annular flow has great importance in the oil industry, in drilling operations with cuttings removal by drilling mud and also in petroleum artificial lifting, with progressive cavity pumping systems. The constant concern about operation costs and the more frequent necessity of raising the production capacity implies in larger flow through oil wells. In th
Publicado em: 2006
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12. SECONDARY FLOW IN PARTIALLY-OBSTRUCTED ANNULAR SPACE WITH INNER CYLINDER ROTATION / ESCOAMENTO SECUNDÁRIO EM UM ANULAR PARCIALMENTE OBSTRUÍDO COM ROTAÇÃO DO CILINDRO INTERNO
The flow inside a horizontal annulus due to the inner cylinder rotation is studied. The bottom of the annular space is partially blocked by a plate parallel to the axis of rotation, thereby destroying the circumferential symmetry of the annular space geometry. This flow configuration is found in the drilling process of horizontal petroleum wells, where a bed
Publicado em: 2004