Desenvolvimento de tubulação em compósito polimérico revestida externamente com poliuretano de alta densidade
Pipelines for the transport of crude oil from the production wells to the collecting stations are named production lines . These pipes are subjected to chemical and electrochemical corrosion according to the environment and the type of petroleum transported. Some of these lines, depending upon t...
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Formato: | Dissertação |
Idioma: | por |
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Universidade Federal do Rio Grande do Norte
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Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/12699 |
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Resumo: | Pipelines for the transport of crude oil from the production wells to the collecting
stations are named production lines . These pipes are subjected to chemical and
electrochemical corrosion according to the environment and the type of petroleum
transported. Some of these lines, depending upon the composition of the fluid
produced, may leak within less than one year of operation due to internal corrosion.
This work aims at the development of composite pipes with an external protecting
layer of high density polyurethane for use in production lines of onshore oil wells,
meeting operational requirements. The pipes were manufactured using glass fibers,
epoxy resin, polyester resin, quartz sand and high density polyurethane. The pipes
were produced by filament winding with the deposition of high density polyurethane
on the external surface and threaded ends (API 15 HR/PM-VII). Three types of pipes
were manufactured: glass/epoxy, glass/epoxy with an external polyurethane layer
and glass/epoxy with an intermediate layer of glass fiber, polyester, sand and with an
external polyurethane layer. The three samples were characterized by Scanning
Electronic Microscopy (SEM) and for the determination of constituent content. In
addition, the following tests were conducted: hydrostatic test, instant rupture, shorttime
failure pressure, Gardner impact, transverse stiffness and axial tension. Field
tests were conducted in Mossoró RN (BRAZIL), where 1,677 meters of piping were
used. The tests results of the three types of pipes were compared in two events: after
two months from manufacturing of the samples and after nine months of field
application. The results indicate that the glass/epoxy pipes with an intermediate layer
of fiber glass composite, polyester e sand and with an external layer of high density
polyurethane showed superior properties as compared to the other two and met the
requirements of pressure class, axial tensile strength, transverse stiffness, impact
and environmental conditions, for onshore applications as production lines |
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