Vibration characteristics of the stepped drill string subjected to gas-structure interaction and spinning motion
作者： X.P. Chang , X. Li , L. Yang , Y.H. Li
DOI: 10.1016/J.JSV.2019.02.003
关键词: Drill pipe 、 Spinning 、 Weight on bit 、 Mechanics 、 Drill string 、 Drilling fluid 、 Drilling 、 Drill 、 Vibration 、 Materials science
摘要: Abstract This paper studies the vibration characteristics of a drill string in gas drilling under gas-structure interactions, and affected by combined effects several parameters including spinning motion, weight on bit, hydrodynamic force, damping force fluid stabilizer. Based Hamilton's principle, dynamic equations subjected to bit interaction are established solved using Galerkin's method. The exact solutions i-th natural frequencies with uniform section derived considering characteristic curves non-dimensional versus different obtained respectively. results show that angular speed, flow velocity, viscous fluid, ratio external diameter pipe collar installation positions stabilizer have significant influences string. In addition, mud system discussed compared, which reveal higher than drilling.
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