SIMULATIONS OF FLOW INDUCED CORROSION IN API DRILLPIPE CONNECTOR  

作　　者：ZHU Hong-jun LIN Yuan-hua ZENG De-zhi YAN Ren-tian 

机构地区：[1]State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China

出　　处：《Journal of Hydrodynamics》2011年第6期784-791,共8页水动力学研究与进展B辑（英文版）

基　　金：supported by the National Nature Science Foundation of China (Grant No. 51074135);supported by the Fundamental Research Funds for the Southwest Petroleum University (Grant No. 2010xjz133)

摘　　要：Drillpipe failure is an outstanding issue in drilling engineering, often involving great financial losses. In view of the special features of the flow channel in the high failure zone, this article analyzes the drillpipe failure mechanism from the point of view of flow induced corrosion. Based on the Eulerian-Langrangian method and the discrete phase model, a numerical simulation method is used to investigate the flows of the drilling fluid in the drillpipe connector during the operation of three typical drilling methods （mud drilling, air drilling and foam drilling）. From the flow field in the drillpipe connector, especially, the velocity and pressure distributions in the threaded nipple and the thickened intermediate belt, one may detect the existence of the flow induced corrosion. Then, some structural optimization measures for the drillpipe connector are proposed, and the optimization effects are compared.Drillpipe failure is an outstanding issue in drilling engineering, often involving great financial losses. In view of the special features of the flow channel in the high failure zone, this article analyzes the drillpipe failure mechanism from the point of view of flow induced corrosion. Based on the Eulerian-Langrangian method and the discrete phase model, a numerical simulation method is used to investigate the flows of the drilling fluid in the drillpipe connector during the operation of three typical drilling methods （mud drilling, air drilling and foam drilling）. From the flow field in the drillpipe connector, especially, the velocity and pressure distributions in the threaded nipple and the thickened intermediate belt, one may detect the existence of the flow induced corrosion. Then, some structural optimization measures for the drillpipe connector are proposed, and the optimization effects are compared.

关 键 词：flow induced corrosion complex multiphase flow drillpipe connector threaded nipple eddy current 

分 类 号：TE921.2[石油与天然气工程—石油机械设备] TN40[电子电信—微电子学与固体电子学]