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Previous issue date: 2014-12-16 / O controle de velocidade de PIGs instrumentados ? necess?rio, dentro da ind?stria de petr?leo e g?s, para permitir uma inspe??o de dutos de melhor qualidade e maior seguran?a. Isto s? ? poss?vel quando esses PIGs mant?m uma velocidade baixa durante a opera??o de inspe??o de dutos, na procura de defeitos como corros?o, trincas e amassamentos. Este trabalho tem por objetivo propor uma tecnologia para o controle de velocidade de PIGs instrumentados utilizando uma v?lvula by-pass acionada por uma solenoide. Essa v?lvula tem a capacidade de controlar o diferencial de press?o atuante no corpo do PIG. E controlar o diferencial de press?o significa controlar a velocidade desse PIG. Uma bancada de testes foi montada em escala reduzida para simula??o de situa??es de ?tiro? e de acelera??o sofridos pelos PIGs. A bancada permitiu estudar as rea??es das press?es a montante e a jusante da v?lvula by-pass. A l?gica Fuzzy foi utilizada para determinar os tempos de abertura e fechamento dessa v?lvula, com objetivo de controlar o diferencial de press?o. Os testes na bancada mostraram uma redu??o substancial no valor do diferencial de press?o atuante no PIG ap?s a ocorr?ncia do ?tiro?. Tamb?m ocorreu uma redu??o no tempo em que o diferencial de press?o vai ao m?ximo e retorna ao valor de refer?ncia predefinido. Os resultados obtidos permitem concluir que ? poss?vel controlar o diferencial de press?o atuante no PIG, assim tamb?m a velocidade, utilizando a l?gica Fuzzy, atuando na abertura e fechamento da v?lvula by-pass proposta. / The speed control of smart
PIGs
is necessary, in oil and gas industry, for allow a
better and safer pipeline inspection. This is possible when those smart it
PIGs
maintain
a low speed while performs a pipeline inspection, in the search for defects as corrosion,
cracks and dents. Our objective propose a technology for speed control of smart pigs
using a by-pass valve triggered by a solenoid. This valve is able to control the pressure
differential applied in
PIG
?s body. Once we control the pressure differential, it is possible
to control the speed of this
PIG
. A experimental benchmark was mounted in reduced
scale for simulation of the
PIG
speed excursion situation and acceleration suffered by the
PIGs
. The experimental benchmark allowed to studying the reactions of the upstream and
downstream pressure over the by-pass valve.The Fuzzy logic was used for determine the
opening and closing period this valve to control pressure differential. The experimental
tests show substantial reduction in pressure differential value over
PIG
after happening
speed excursion. Also, the time necessary for the pressure differential go to maximum and
returns to default reference value. The results obtained allow conclude which is possible
to controlling pressure differential applied in
PIG
, thus also the speed, using Fuzzy logic,
acting opening and closing period of proposed by-pass valve
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/24290 |
| Date | 16 December 2014 |
| Creators | Lima, Gustavo Fernandes de |
| Contributors | 51618362968, Maitelli, Andr? Laurindo, 42046637100, Fontes, Francisco De Assis Oliveira, 20300190468, Filho, Oscar Gabriel, 11376040697, Salazar, Andres Ortiz |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA EL?TRICA E DE COMPUTA??O, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | Unknown |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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