Oil Wells Drilling
Mostrando 13-24 de 30 artigos, teses e dissertações.
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13. NUMERICAL ANALYSIS OF MECHANICAL BEHAVIOR OF THE SALT IN OIL WELLS / ANÁLISE NUMÉRICA DO COMPORTAMENTO MECÂNICO DO SAL EM POÇOS DE PETRÓLEO
The presence of saline structures around the world, in deepwater like the ones of the Mexican Gulf, Brazil, Angola, North and West Africa, provides favorable conditions for hydrocarbons imprisonment. It increases the probability of success in oil and gas exploration. In the Santos Basin, for example, it was recently noticed that a light crude oil located bel
Publicado em: 2008
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14. 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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15. 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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16. 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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17. "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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18. Scheduling of development activities of oil wells : GRASP / Escalonamento de atividades de desenvolvimento de poços de petroleo: GRASP
This dissertation aimed at studying and solving a real world scheduling problem. We deal with the scheduling of offshore oil well development activities. A simpler version of this same problem was proved to be in NP-hard. Our approach treats this problem as faced by Petrobras, with all its characteristics and details. Before promising locations at petrolifer
Publicado em: 2005
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19. Uma metodologia para anÃlise das conseqÃÃncias de um blowout durante a perfuraÃÃo de poÃos offshore / A methodology for analysis of the consequences of one blowout during the perforation of wells offshore
The main safety concern during the drilling of oil wells is the possibility of blowout. A blowout is the release of hydrocarbons under pressure. In case that the immediate ignition of these hydrocarbons occurs, the expected fire is a jet fire. Jet fire are turbulent diffusion flames. Normally, the thermal energy released for the jet fire is very high and suf
Publicado em: 2005
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20. 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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21. 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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22. 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
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23. DESENVOLVIMENTO DE EQUIPAMENTO E METODOLOGIA DE TESTES PARA AVALIAÇÃO DA INTERAÇÃO FOLHELHO-FLUIDO DE PERFURAÇÃO / DEVELOPMENT OF EQUIPMENT AND TESTING METHODOLOGY TO EVALUATE ROCK-DRILLING FLUID INTERACTION
The drilling of oil wells through shales, which constitute the majority of rocks in the stratigraphic column, may present instability problems due to physico-chemicals interactions between the drilling fluids and these rocks. The costs associated to the solution of these problems are very high and, depending upon the intensity of these problems, wells can be
Publicado em: 2003
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24. 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