Two-three degree of freedom model for Anti Stick-Slip Tool of drill-string

Document Type : Research Article

Authors

Sahand University of Technology, Department of Mechanical Engineering, Tabriz, Iran

Abstract

The drill-string experiences strong vibrations due to its length and interactions with the rock at the bit. The Anti Stick-Slip Tool (ASST), located at the end of the drill-string, effectively prevents the stick-slip and torsional vibrations. A new model has been proposed to analyze the tool, overcoming previous limitations. The model represents the system with two degrees of freedom in its non-activated state and three degrees of freedom when activated based on kinematic constraints. Simulations demonstrate the logical behavior of tools under external forces and torques. The model accurately depicts the effect of weight on bit and weight on the hook on the activation of tool. The proposed model enables researchers to study the nonlinear behavior of ASST resulting from switching between equations in specific operational conditions.

Keywords

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References

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Amirkabir Journal of Mechanical Engineering
Volume 55, Issue 6
September 2023
Pages 737-758

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