Drilling Effects
Mostrando 13-24 de 29 artigos, teses e dissertações.
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13. Efeito do BÃrio e CÃdmio no desenvolvimento populacional de Pellioditis marina ( Bastian, 1865) ( Nematoda, Rhabtidae) e Diplollaimeloides oschei Meyl, 1954 ( Nematoda, Monhysteridae)
Oil and gas drilling activities usually involve the use of fluids that contain several heavymetals, among those, barium and cadmium, which can affect the biota from the surrounding area. Nematodes are the most abundant metazoan, and play an important role on the food web and in the carbon flux. The aim of this work was to analyze the population development o
Publicado em: 2008
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14. Avaliação de um vitrocerâmico elaborado a partir do genérico do biovidro 45S5 em perfurações de tíbias de ratos, e seu comportamento sob influência da radiação laser de baixa intensidade / Evaluation of a glass ceramic produced from the generic of bioglass 45S5 in drilling of tibias of rats, and their behavior under the influence of low-intensity laser radiation
The present study evaluated the effects caused by the low level laser therapy (LLLT) at lâmbda780 nm, power of 30 mW and dose of 112.5 J/CM POT.2and total energy of 4.5 J on the behavior osteoconductor of the glass-ceramic drafted from generic of bioglass of composition: 45% SIO IND.2, 24.5% NA IND.2O, 24.5% CAOand 6% P IND.2O IND.5in drillings in tibia bon
Publicado em: 2008
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15. 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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16. Indicadores de sustentabilidade da produção familiar mecanizada de grãos em modalidades de plantio direto no Norte do Paraná, Brasil
Thirteen farms of the Network of References for Household Farming that use no-tillage tecnhnology in grain production were studied with regard to their economic revenues and classified according type and time of no-tillage adoption. Six of them were selected for detailed study of morphological, phisical and chemical atributes of their soils. The objective wa
Publicado em: 2007
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17. Estudo laboratorial dos danos causados pelo broqueamento e retificaÃÃo em corpos-de-prova testemunhos
It is normal in engineer practice to use core testing to determine the inplace compressive strength of concrete in a structure. Generally, cores are obtained to: Asses whether suspect concrete in a new structure complies with strength-based acceptance criteria; or determine in-place concrete strengths in an existing structure for the evaluation of structural
Publicado em: 2006
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18. 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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19. MODELO ESTOCÁSTICO PARA A EXCLUSÃO PELO TAMANHO DURANTE O TRANSPORTE DE SUSPENSÕES PARTICULADAS EM MEIOS POROSOS / STOCHASTIC MODEL FOR SIZE EXCLUSION MECHANISM DURING SUSPENDED PARTICLE SUSPENSION TRANSPORT IN POROUS MEDIUM
Deep bed filtration of water with particles occurs in several industrial and environmental processes like water filtration and soil contamination. In petroleum industry, deep bed filtration occurs near to injection wells during water injection, causing injectivity reduction. It also takes place during well drilling, sand production control, produced water di
Publicado em: 2005
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20. EVALUATION OF PLASTIC EFFECTS IN RESIDUAL STRESS MEASUREMENT BY THE HOLE DRILLING TECHNIQUE / AVALIAÇÃO DOS EFEITOS DA PLASTICIDADE NA MEDIÇÃO DE TENSÕES RESIDUAIS PELA TÉCNICA DO FURO CEGO
Uma das técnicas mais aplicadas para medir tensões residuais em componentes mecânicos é a técnica do furo cego. Esta técnica é de fácil aplicação industrial e é normalizada pela ASTM E 837. Entretanto, devido à concentração de tensões gerada pelo furo, há restrições quanto à aplicação deste método quando as tensões residuais presentes
Publicado em: 2003
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21. 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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22. LIQUID DISPLACEMENT OF IMISCIBLE FLUIDS IN TUBES: CAPILLARITY, INERCIA, VISCOSITY RATIO AND RHEOLOGICAL PROPERTY EFFECTS / DESLOCAMENTO DE FLUIDOS IMISCÍVEIS EM TUBOS: EFEITO DE CAPILARIDADE, INÉRCIA, RAZ ÃO DE VISCOSIDADES E PROPRIEDADES REOL OGICAS
There are many important processes in industry that use liquid displacement of imiscible fluids in tubes. Some practical applications include enhanced oil recovery, ce- mentation of drilling wells and coating of internal surfaces of the tubes. For a good understanding of these problems, it is extremely important to study the effect of cap-illarity,inertia an
Publicado em: 2002
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23. NUMERICAL ANALYSIS OF DYNAMIC FRACTURING OF THE ROCK BY THE EXPLOSION / ANÁLISE NUMÉRICA DO FRATURAMENTO DINÂMICO DE ROCHAS POR EXPLOSÃO
Rock blasting are usually carried out by drilling slender holes into a rock mass and detonating explosive charges in their interiors. The detonation produces a fast increase in the temperature surrounding the holes and a huge gas expansion that will apply high pressures on the walls. Crushing and fracturing of the rock will occur as a consequence of the shoc
Publicado em: 2001
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24. Metodologia para analise da interação coluna de perfuração/Riser/poço por elementos finitos
The work propose a methodology for estimation of the contact forces generated by the drill string against the well and the drilling riser system. The solution is obtained using the Finite Element Method with a non-linear aproach in a static, 2D model. The stiffeness effects of the drill string are kept by discretyzing an indeformed configuration and then dis
Publicado em: 1994