Nonlinear Friction Compensation Design for Suppressing Stick Slip Oscillations in Oil Well Drillstrings
نویسندگان
چکیده
Friction appears in all mechanical systems and has a significant impact on control. This paper presents simple but effective nonlinear friction compensation method for a drillstring system, by considering the stickslip motion of the bit on the bottom hole assembly (BHA) in oil wells. Due to nonlinear problem at nearzero velocity where the torque exerted on bit is a function of the bit speed, the drillstring controlling is not an easy task. The control strategy proposed in this work involves a combination of a feedback model based compensation of friction and linear controller which enables to reduce the stick slip oscillations. The effectiveness of this approach is demonstrated through the resultants simulations. Copyright © 2004 IFAC
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تاریخ انتشار 2004