Equilíbrio e vibrações induzidas por vórtices de "risers" de perfuração

Presents a study about drilling risers used by semisubmersible platforms in order to drill wells in deep waters. Firstly, a study about static equilibrium is presented. This allows to select adequate risers for places with usual natural conditions. The selection takes into account the riser tension, the natural ·conditions and the pertinent drilling parameters. Then, a brief study about free vibrations is presented. Finally, the analysis of transverse vibrations induced by vortex-shedding is dane. These vibrations can occur in places of strong marine currents. The mathematical model was postulated by Skop and Griffin and its solution was dane by the normal form method. The proposed method allows the construction of the riser frequency response near a resonance condition.

Grantor dc:publisher

Universidade Federal do Rio de Janeiro

Year dc:date.issued

1980

Author dc:creator

• Farias, Francisco Mourão

Advisor dc:contributor.advisor

• Hsu, Liu

• Vórtices dos fluídos
• Perfuração de poços
• Estruturas offshore
• Petróleo

Statement dc:rights

• Acesso Aberto

Language dc:language

por

Handle dc:identifier.uri

http://hdl.handle.net/11422/3622

OAI identifier oai:identifier

oai:pantheon.ufrj.br:11422/3622