Petroleum Science >2011,??Issue 3:??345-352 DOI: https://doi.org/10.1007/s12182-011-0151-z
A numerical method for determining the stuck point in extended reach drilling Open?Access
文章信息
作者：Sun Lianzhong and Gao Deli
作者單位：
Key Laboratory of Petroleum Engineering, Ministry of Education, China University of Petroleum, Beijing 102249, China;Key Laboratory of Petroleum Engineering, Ministry of Education, China University of Petroleum, Beijing 102249, China
投稿時間：2010-12-31
引用方式：Sun, L. & Gao, D. Pet. Sci. (2011) 8: 345. https://doi.org/10.1007/s12182-011-0151-z
文章摘要
A stuck drill string results in a major non-productive cost in extended reach drilling engineering. The first step is to determine the depth at which the sticking has occurred. Methods of measurement have been proved useful for determining the stuck points, but these operations take considerable time. As a result of the limitation with the current operational practices, calculation methods are still preferred to estimate the stuck point depth. Current analytical methods do not consider friction and are only valid for vertical rather than extended reach wells. The numerical method is established to take full account of down hole friction, tool joint, upset end of drill pipe, combination drill strings and tubular materials so that it is valid to determine the stuck point in extended reach wells. The pull test, torsion test and combined test of rotation and pulling can be used to determine the stuck point. The results show that down hole friction, tool joint, upset end of drill pipe, tubular sizes and materials have significant effects on the pull length and/or the twist angle of the stuck drill string.
關鍵詞
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Extended reach drilling, stuck pipe, torque and drag, numerical method