Petroleum Science >2012,??Issue 3:??363-369 DOI: https://doi.org/10.1007/s12182-012-0220-y
Modeling the pressure characteristics of parallel chokes used in managed pressure drilling and related experiments Open?Access
文章信息
作者：Liu Gonghui,Zhang Tao,Li Jun and Yang Yulong
作者單位：
China University of Petroleum, Beijing 102249, China; Beijing Information Science & Technology University, Beijing 100101, China;China University of Petroleum, Beijing 102249, China;China University of Petroleum, Beijing 102249, China;China University of Petroleum, Beijing 102249, China
投稿時(shí)間：2012-01-16
引用方式：Liu, G., Zhang, T., Li, J. et al. Pet. Sci. (2012) 9: 363. https://doi.org/10.1007/s12182-012-0220-y
文章摘要
Based on the local resistance computation model for a choke valve and using the flow characteristics of choke valves, we studied the relationships between the back pressure of a parallel choke assembly and the opening extent of choke valves and developed a model to characterize the pressure regime of the manifold assembly. A comparison of pressure characteristic curves shows that a parallel choke manifold assembly has obvious advantages over the conventional serial type including high linearity of pressure-regulating characteristics curves, the elimination of the overshoot interval, wider effective regulating interval and the higher system security. Laboratory hydraulic experiments have validated the capability of a back pressure control model for the parallel choke assembly to accurately control pressure. This study is of great theoretical and practical significance to further improve the performance of chokes used in managed pressure well drilling.
關(guān)鍵詞
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MPD, choke, parallel choke, pressure control