A Review of Coupled Vibration Models of Drillstring
Drilling is a significant constituent part in the process of the exploration and exploitation of oil and gas. Capital expenditure spent on the drilling process make up large portion of the entire cost, and so much of the reason causing this consequence depends on the unwanted vibrations of drillstring. Unwanted vibrations may cause premature failure of drillstring and bottom hole assembly (BHA), excessive friction of bit and inefficient drilling. However, there are also wanted vibrations, which can enhance the drilling process. A large number of models have been developed in the past decades. Due to the complexity of surrounding, a wide variety of boundary conditions (BCs) and assumptions are typically made. This paper aiming at providing a broad review on coupled vibrations of drillstring including coupled axial–torsional vibrations, coupled axial–lateral vibrations and coupled torsional–lateral vibrations.
KeywordsDrillstring dynamics Nonlinear dynamics Drillstring vibrations Coupled vibrations model BHA
This research is funded by the Natural Science Foundation of China (No. 11372071) and the Northeast Petroleum University Innovation Foundation for Postgraduate (No.YJSCX2016-022NEPU).
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