In both of scientific and industrial drilling, it is not desirable to any have accompanying vibrations, large fluctuations, or other unexpected dynamics disturbing a steady and stable drilling process. One of the origins of such disturbances can be the flexibility of the drill pile; drill pipe is easily deformed by external perturbations because it is very long and slender. To specify the stable range of parameters of drill pipe, we theoretically and numerically analyzed a Cosserat-type mathematical model of drill pile. The values of the parameters of this model were set to appropriate values representing actual riserless drilling situations adopted in the operations of the scientific deep-sea drilling vessel Chikyu owned by the Japan Agency for Marine-Earth Science and Technology (JAMSTEC). We concluded that the buckling of pipe should be treated as a possible accident, but buckling does not happen in the normal operations of the Chikyu.
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ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering
June 25–30, 2017
Trondheim, Norway
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-5776-2
PROCEEDINGS PAPER
Mathematical Analysis of Possible Range of Stable Drilling in Offshore Riserless Drilling System
Miki Y. Matsuo,
Miki Y. Matsuo
Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
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Tomoya Inoue,
Tomoya Inoue
Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
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Hide Sakaguchi
Hide Sakaguchi
Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
Search for other works by this author on:
Miki Y. Matsuo
Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
Tomoya Inoue
Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
Hide Sakaguchi
Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
Paper No:
OMAE2017-62337, V008T11A015; 6 pages
Published Online:
September 25, 2017
Citation
Matsuo, MY, Inoue, T, & Sakaguchi, H. "Mathematical Analysis of Possible Range of Stable Drilling in Offshore Riserless Drilling System." Proceedings of the ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. Volume 8: Polar and Arctic Sciences and Technology; Petroleum Technology. Trondheim, Norway. June 25–30, 2017. V008T11A015. ASME. https://doi.org/10.1115/OMAE2017-62337
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