کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
838864 908372 2009 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An alternative characterization of bit-sticking phenomena in a multi-degree-of-freedom controlled drillstring
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
An alternative characterization of bit-sticking phenomena in a multi-degree-of-freedom controlled drillstring
چکیده انگلیسی

A piecewise-smooth model of three degrees of freedom, which exhibits friction-induced stick-slip oscillations, is considered. This model corresponds to a simplified torsional lumped-parameter model of an oilwell drillstring. An alternative method to characterize the stick-slip motion and other bit-sticking problems in such a drilling system is proposed. This method is based on the study of the relationships between the different types of system equilibria and the existing sliding motion when the bit velocity is zero. It is shown that such a sliding motion plays a key role in the presence of nondesired bit oscillations and transitions. Furthermore, a proportional-integral-type controller is designed in order to drive the rotary velocities to a desired value. The ranges of the controller and the system parameters which lead to a closed-loop system without bit-sticking phenomena are identified.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nonlinear Analysis: Real World Applications - Volume 10, Issue 5, October 2009, Pages 3162–3174
نویسندگان
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