海底地盤と深海掘削技術(<特集>他分野との融合)

概要

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Deep-sea drilling vessel CHIKYU was delivered to the JAMSTEC (Japan Agency for Marine-Earth Science and Technology) in July 2005. The ship, which was originally designed for scientific deep-sea drilling, equips with the state-of-the-art drilling technology and laboratory equipment. D/V Chikyu introduced a riser drilling technology which has been well used at oil and gas exploration by industries. Geo-technical data were well collected in advance to an actual drilling operation. They are detail sea floor mapping by swath bathymetry equipment, reflection seismic profiling, core sampling, etc. Such geo-technical data are very important to understand what properties are estimated at near sea floor. Because the riser drilling requires to set a BOP (Blow-Out Preventer) on the sea floor and which works for preventing high pressure gas and/or fluid explosion in case of emergency situation. So geo-technical data acquisition is very important work for deep-sea drilling.
2009-11-01