Drillstring Oscillations: The Influence of Fluid Loading and Stabilizer Effects | Zendy

Yongsheng Liu | Zendy; Deli Gao | Zendy; Vipin Agarwal | Zendy; Xie Zheng | Zendy; Balakumar Balachandran | Zendy

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Drillstring Oscillations: The Influence of Fluid Loading and Stabilizer Effects

Author(s) -

Yongsheng Liu,

Deli Gao,

Vipin Agarwal,

Xie Zheng,

Balakumar Balachandran

Publication year - 2021

Publication title -

shock and vibration

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.418

H-Index - 45

eISSN - 1875-9203

pISSN - 1070-9622

DOI - 10.1155/2021/8888837

Subject(s) - vibration , stabilizer (aeronautics) , casing , perturbation (astronomy) , drilling fluid , engineering , drill pipe , subharmonic function , mechanics , resonance (particle physics) , fluid–structure interaction , structural engineering , physics , drilling , mechanical engineering , acoustics , mathematics , finite element method , mathematical analysis , particle physics , quantum mechanics

Drillstring vibrations can be undesirable for drilling operations. Here, attention is focused on vibrations of the upper portion of a drillstring as these vibrations can cause drillpipe wear and casing wear. A reduced-order model is developed to study the motions of a drillstring by taking fluid loading and stabilizer effects into account. In this model development, the distributed nature of the fluid loading is taken into account, and the drillstring is treated as a beam structure. Perturbation analyses are carried out with the reduced-order system, and the system responses are examined for primary and secondary (subharmonic and superharmonic) resonance excitations. The analytical-numerical results reveal the rich nature of the system behavior and help understand the drillstring motions during various resonance conditions.

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