Dr. Pauline Nüsse (DigiWells) with representatives from the committee and the PhD supervisors, from left to right: Committee: Prof. Børge Rokseth (NTNU); Supervisors: Prof. Ole Morten Aamo (NTNU) and Dr. Adrian Ambrus (NORCE)

On Tuesday, May 13, Pauline Marie Nüsse defended a thesis with the title Control of Distributed Damping Subs for Torsional Vibration Mitigation in Drilling at NTNU. She is the third PhD alumni from DigiWells.

Some quotes from the committee report:

Some quotes from the committee report: At the defense Pauline "…gave a good representation of the content of the thesis. It was clear and well structured."

“The research is empirical, addressing a significant and timely industrial challenge in the mitigation of torsional vibrations in drilling through active control strategies. The candidate proposes innovative solutions including an active sleeve control, an anti slip logic, and a combined control approach integrating both downhole and surface based mitigation systems. These contributions are original and represent a state of the art advancement in the field. The thesis demonstrates academic independence, methodological rigor, and relevance to real world applications.”

"Supported by publications in reputable peer reviewed venues, the work reflects strong research capability and delivers a coherent and comprehensive contribution to the field. It meets and exceeds the expectations for a PhD level dissertation in both quality and originality."

Publications:

  • Nüsse, P. M., Ambrus, A., Aarsnes, U. J. F., Aamo, O. M., “Evaluationof distributed damping subs with active control for stick–slip reduction in drilling”. In: Geoenergy Science and Engineering 231 (2023), p. 212255. doi:https://doi.org/10.1016/j.geoen.2023.212255
  • Nüsse, P. M., Ambrus, A., Aamo, O. M., “Decentralized Active Control of Distributed Damping Subs for Stick-Slip Reduction in Drilling”. In: SPE/IADC Drilling Conference and Exhibition Day 1 Tue, March 05, 2024 (2024), D011S004R004. doi: 10.2118/217676-MS
  • Nüsse, P. M., Ambrus, A., Aamo, O. M., “Active Control of Distributed Subs With Anti-Slip Logic for Torsional Vibration Damping in Drilling”. In: vol. 8: Offshore Geotechnics; Petroleum Technology. International Conference on Offshore Mechanics and Arctic Engineering. June 2024, V008T11A003. url: https://doi.org/10.1115/OMAE2024-123992
  • Nüsse, P. M., Ambrus, A., Aamo, O. M., “Decentralized Active Control of Distributed Damping Subs for Stick-Slip Reduction in Drilling”. In: SPE Journal (accepted)

Thesis:

Nüsse P.M Control of Distributed Damping Subs for Torsional Vibration Mitigation in Drilling PhD Thesis, NTNU. URI: https://hdl.handle.net/11250/3191968