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On the formation of limit cycle of the friction-induced stick-slip vibration in oilwell drillstring
2015
Petroleum
In this paper, the stick-slip vibration in oilwell drillstring is studied. The drilling system is modelled as a lumped-parameter torsional pendulum and the interaction between the drill bit and the rock is treated as Coulomb friction. Equation of motion of the drill bit is established and the dynamic responses of the drill bit are obtained. A drilling system with the drillstring length 3000 m is analysed, in which the system parameters are selected by reference to the actual drilling situation.
doi:10.1016/j.petlm.2015.03.005
fatcat:h3xt2ngbbrhkvpn4nsdpqcqhqi