An approach for efficient analysis of drill-string random vibrations
- 出版日期：2002.
- 页数：86 p. :
- 第一责任说明：Nikolaos P. Politis.
- 分类号：a661.4
- ISBN：0493614699(ebk.) :
MARC全文
02h0026035 20111123133314.0 cr un||||||||| 111121s2002 xx ||||f|||d||||||||eng | AAI1408700 0493614699(ebk.) : CNY371.35 NGL NGL NGL a661.4 Politis, Nikolaos P. An approach for efficient analysis of drill-string random vibrations [electronic resource] / Nikolaos P. Politis. 2002. 86 p. : digital, PDF file. Source: Masters Abstracts International, Volume: 40-06, page: 1610. ; Chair: Pol D. Spanos. Thesis (M.S.)--Rice University, 2002. Includes bibliographical references. Lateral vibrations are widely recognized as the leading cause of drill-string failures in oil well operations. The finite elements method formulation is used for the mathematical modelling. Due to the erratic nature of the forces at the drill-bit, a stochastic dynamics approach is followed. Both the method of statistical linearization, and the Monte Carlo method are used to analyze the system dynamics. Numerical results pertaining to data obtained by measurement while drilling tools are presented. The significance of the present study, over studies available in the literature, hinges upon the computational efficiency of the adopted piecewise linear model of the drill-string—well formation interaction and the derivation of information on the probability density function, and the power spectrum of the erratic drill-string motion. It is expected that this study will enhance the interest in using stochastic dynamics techniques in drilling system analysis and design. Oil wells. ; Oil well drilling. Electronic books. aeBook. aCN bNGL http://proquest.calis.edu.cn/umi/detail_usmark.jsp?searchword=pub_number%3DAAI1408700&singlesearch=no&channelid=%CF%B8%C0%C0&record=1 NGL Bs1071 rCNY371.35 ; h1 bs1108