DEVELOPMENT OF A VIBROIMPACT DEVICE / DESENVOLVIMENTO DE UM DISPOSITIVO GERADOR DE VIBROIMPACTO

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

Hard rock drilling is still a great challenge for oil companies. One current line of research involves combining the two existing drilling techniques in order to enhance the rate of penetration. This new technique is called Resonance Hammer Drilling. This dissertation proposes the design and development of the first prototype that will operate in resonance, and will be capable of generating considerable dynamic forces. This device will be known as the Resonant Impact Device, or RIMD. In principle the idea is to build some sort of black box, which will be mounted on a vibrating structure with two switches - one calibrating the RIMD resonance frequency and the other acting on the impacts - changing the size of the gap. It is known from previous work that gap size also has influence on the system natural frequency. Therefore there is a relationship between switches. One of the first steps of RIMD design and development is device dimensioning, necessary in order to construct a scale model at the Dynamic and Vibration laboratory at PUC-Rio representative of the real size system. The real size system will be mounted on the drillstring. RIMD components involve a mass-spring system with low damping and some impact and gap variation devices. The analysis of this prototype includes obtaining key characteristics such as the range of possible frequencies and the measurement of the generated impulsive forces. Finally, the built prototype will be used to validate an analytical model that will allow further investigations on this subject providing the way to other possible constructions.

ASSUNTO(S)

vibracao axial taxa de penetracao oilwell drillstrings impacto rate of penetration axial vibration colunas de perfuracao vibroimpacto vibroimpact impact

ACESSO AO ARTIGO

Documentos Relacionados