摘要
钻具组合在井下所承受的应力水平是影响其疲劳寿命的一个关键因素。因此定量分析研究钻具在井下所承受的应力水平及其影响因素 ,是研究钻具疲劳失效的一项重要内容。现文以固体力学有限元理论为基础 ,建立了带扶正器下部钻具组合在弯曲井眼或斜直井眼中的有限元力学模型 ,求解并得到了下部钻具组合的应力场。并着重对影响钻具组合应力水平的影响因素即井眼曲率、钻压、钻柱稳定器的安放位置等进行了敏感性分析。揭示了下部钻具组合失效的力学机理。
The stress level is the key factor that affects the fatigue life of bottom hole assembly. It is very important to make a quantitative research on the stress distribution of bottom hole assembly and the factors which affect the stress level. In this paper, finite element mechanics models for bottom hole assembly in curvature hole were established based on solid mechanics, and solved the models by large commerce software, and found the stress field. Sensibility analysis of the factors affecting the stress level such as hole curvature, WOB, position of the stabilizer were studied emphatically. The stress analysis methods reveals the mechanics mechanism of drill tool fatigue failures. It is the first time to research on the stress distribution feature of the whole bottom hole assembly in the research.
出处
《石油矿场机械》
北大核心
2001年第3期19-22,共4页
Oil Field Equipment
关键词
钻具失效
钻具组合
有限元法
钻井
应力
drill tool failure
bottom hole assembly
FEM
stress
factor
research
