Document Type
Conference Proceeding
Publication Date
2-5-2024
Abstract
In this paper, a mathematical model is proposed to further understand the dynamic effects [drilling] mud exerts on the drill-string assembly. The proposed model consists of a rotor subjected to various revolutions per minute (RPM’s), an axial force which accounts for the weight-on bit requirements, and a harmonic excitation simulating fluid mud circulating along the well-bore. In this regard, Euler-Bernoulli beam theory is incorporated to establish a multi-degree-of-freedom (MDOF) mathematical expression of a specific section of the BHA. In this regard, a finite element methodology was implemented to determine the corresponding parameters of the equation of motion and elucidate the elastic characteristics of the drill-string assembly. A two-node element containing two displacements and two rotations per node was adopted to describe the rotor as a uniform, elastic beam. In addition, gyroscopic effects of the drill-string assembly were accounted in the equation of motion. The motion of the mud on the drill-string is characterized by implementing damped oscillators on nodes one, three, five, and seven.
Recommended Citation
Marquez, E. "Predicting Oscillatory Patterns of Mud Circulating Along the Well-Bore in Drilling Procedures: A Finite Element Model." Proceedings of the ASME 2023 International Mechanical Engineering Congress and Exposition. Volume 6: Dynamics, Vibration, and Control. New Orleans, Louisiana, USA. October 29–November 2, 2023. V006T07A013. ASME. https://doi.org/10.1115/IMECE2023-113806
Publication Title
Proceedings of the ASME 2023 International Mechanical Engineering Congress and Exposition
DOI
https://doi.org/10.1115/IMECE2023-113806
Comments
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