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Cutting of Fluid Saturated Rock: A Tentative Explanation of Dilation vs. Compaction

[+] Author Affiliations
Rudy L. J. Helmons, Cees van Rhee

Delft University of Technology, Delft, Netherlands

Emmanuel Detournay

University of Minnesota, Minneapolis, MN

Mario Alvarez Grima

IHC MTI, Delft, Netherlands

Paper No. OMAE2018-78042, pp. V006T05A015; 7 pages
doi:10.1115/OMAE2018-78042
From:
  • ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 6: Ocean Space Utilization
  • Madrid, Spain, June 17–22, 2018
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-5125-8
  • Copyright © 2018 by ASME

abstract

Traditionally, rock cutting models for land-based and shallow water applications assume that the rock is cut under atmospheric and dry conditions. For deep sea applications this assumption is not valid, especially because the hydrostatic pressure can be of the same order of magnitude as the unconfined compressive strength of the rock. Therefore it is necessary that both the effect of hydrostatic pressure and the presence of a pore fluid are included in the rock cutting models as well.

This paper focuses on extension of the existing phenomenological rock cutting theory for deep sea applications. The suggested improvements of the model are based on observations from both experiments and simulations. The ideas presented can be helpful for the design of equipment for the drilling, deep sea mining and subsea trenching industries.

Copyright © 2018 by ASME
Topics: Fluids , Compacting , Cutting , Rocks

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