Abstract:

When petroleum well drilling process roller bit broken crag the tooth stress is quite complex. The drill bit service life and tooth stress size has direct correlation. In order to explore the drill bit tooth in broken crag process stress rule, the strength experimental study of the roller bit tooth was made under the laboratory condition. The roller bit tooth had measured the strength experimental study, but the results of the tentative data had the massive noises actually, affected seriously to tentative data processing and the analysis, with the wavelet transform pair tentative data carrying on the chirp processing, obtained the very good result. The massive noises the difficult problem was solved effectively.

Key words: roller bit, measurement force of tooth, de noising analysis, wavelet transfer