Drilling Fluids
Mostrando 25-36 de 43 artigos, teses e dissertações.
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25. Determination of friction loss of drilling fluids during their flow thru special accessories. / Determinação da perda de carga de fluidos de perfuração no escoamento através de acessórios especiais.
Neste trabalho é avaliada a perda de carga resultante do escoamento de fluidos de perfuração através de acessórios especiais, que estão presentes na coluna de perfuração de poços de petróleo e são denominados tool joints, estabilizador e ejetores. Os tool joints realizam a conexão entre os tubos da coluna de perfuração, os estabilizadores são
Publicado em: 2008
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26. 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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27. 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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28. Study of the PVT behavior of methane and N-paraffin based drilling fluids mixtures / Estudo do comportamento PVT de misturas de metano e fluidos de perfuração base N-parafina
O estudo da interação entre o gás da formação produtora e o fluido de perfuração durante as operações é essencial para perfuração de cada fase do poço de forma segura e econômica. Aspectos ambientais e técnicos peculiares à perfuração em águas profundas e ultra profundas exigem o uso de fluidos de perfuração sintéticos, de baixa toxicid
Publicado em: 2007
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29. Estudo das condições operacionais na produção de xan-tana por X. arboricola pv pruni para aplicação em fluido de perfuração de poços de petróleo / Study of operational conditions in xanthan production by Xanthomonas arboricola pv pruni for oilwell drilling fluid
Xanthan yield and physical and chemical characteristics can be improved by modification in culture conditions, as well as, by post-fermentation treatments in order to obtain a xanthan with the required characteristics. The aim of this work was to study the operational conditions in xanthan production by Xanthomonas arborícola pv pruni strains 106 and 115 to
Publicado em: 2007
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30. "Avaliação do potencial de contaminação de aqüíferos porosos a partir da perfuração de poços de petróleo utilizando fluído n-Parafina" / "Potential aquifer pollution from n-Paraffin based drilling fluids in oil wells"
Na perfuração de poços para extração de petróleo são utilizados fluidos de perfuração compostos por diversos produtos químicos com finalidades específicas em função das características de cada poço. Durante vários anos utilizou-se fluido a base de óleo diesel, devido à excelente performance proporcionada à perfuração. O aumento da preocu
Publicado em: 2006
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31. INTERAÇÃO FLUIDOS SINTÉTICOS BASE-ÓLEO E BASE-ÁGUA E FOLHELHOS / SHALE-SYNTHETICS OIL AND WATER FLUIDS INTERACTION
A methodology was developed to experimentally obtain the capillary pressure of different fluids in contact with shales and compare these values with analytical results from individual characterization of fluids and shales. Tests were carried out in a diffusion cell, which allows the simulation of in-situ pressure conditions, the evaluation of physical-chemic
Publicado em: 2005
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32. DISPLACEMENT OF NON-NEWTONIAN LIQUIDS IN ECCENTRIC ANNULI / DESLOCAMENTO DE LÍQUIDOS NÃO NEWTONIANOS EM TUBOS ANULARES EXCÊNTRICOS
In cementing processes of oil wells, the mud formerly used to drag the gravel, to lubricate and to cool the drill is removed and substituted by a cement mixture. This substitution is obtained by the displacement of a fluid by another in the annulus between the rock formation and the casing. For best results of cementing process, intermediate fluids, also cal
Publicado em: 2005
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33. MECANISMOS QUE GOVERNAM A EFETIVIDADE DE AGENTES OBTURANTES NO CONTROLE DA INVASÃO DE FLUIDOS DE PERFURAÇÃO NA ROCHA RESERVATÓRIO DE PETRÓLEO / THE DRIVING MECHANISMS FOR BRIDGING AGENTS EFFECTIVENESS ON DRILLING FLUIDS INVASION CONTROL INTO OIL RESERVOIR ROCKS
Este estudo procurou observar e quantificar os parâmetros operacionais que governam as propriedades permoporosas da torta de filtração, formada após o escoamento de uma solução de glicerina com uma determinada concentração de sólidos. A formação de um reboco externo de baixa permeabilidade é um dos fatores mais importantes para minimizar da invas
Publicado em: 2005
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34. PRESSURE DROP IN AXIAL FLOW THROUGH ANNULAR REGION WITH INNER CYLINDER ROTATION / QUEDA DE PRESSÃO EM ESCOAMENTO AXIAL ATRAVÉS DE REGIÃO ANULAR COM ROTAÇÃO DO CILINDRO INTERNO
The present work investigated the pressure drop generated by the flow through an annular configuration with rotation of the inner cylinder. The motivation for the work comes from the several industrial application of the configuration, such as chemical reactors, filters and in drilling operations for oil and gas wells. The experimental study was conducted in
Publicado em: 2005
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35. Bentonites from Boa Vista, Brazil: physical, mineralogical and rheological properties
The aim of this work is to characterize physically and mineralogically six samples of natural and industrialized bentonites from Paraíba, Brazil, and to study its rheological properties to be used as a components of water based drilling fluids. Also it is intended to compare the evolution of the mineralogical composition and rheology of these clays after 40
Materials Research. Publicado em: 2004-12
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36. CONVECÇÃO FORÇADA EM ESCOAMENTOS LAMINARES DE LÍQUIDOS VISCOPLÁSTICOS EM TUBOS E ESPAÇOS ANULARES / FORCED CONVECTION IN LAMINAR FLOWS OF VISCOPLASTIC LIQUIDS THROUGH TUBES AND ANNULI
Non-Newtonian fluids flow are very common in industrial processes, so it is important to know both the effect of the process on the fluid and vice-versa. Non-Newtonian Fluids exhibit complex mechanical behavior not found in Newtonian fluids, such as shear-rate-dependent viscosity and non-zero Yield stress. Nowadays there is a lack of understanding in the lit
Publicado em: 2004