Riser Vessel

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Chikyu means "Planet Earth" in Japanese. Chikyu's unique features build IODP's capability to access new regions beneath the Earth's crust.

 The Center for Deep Earth Exploration (CDEX) within The Japan Agency for Marine-Earth Science and Technology (JAMSTEC) is responsible for the overall management of Chikyu.

  • CDEX contracts the vessel operations; provides services to support science activities including on-board staffing, data management for core samples and logging; implements engineering site surveys; and conducts engineering developments.
  • The Center for Advanced Marine Core Research operated by Kochi University and CDEX, provides analytical equipment for core processing, curates IODP cores (including microbiological samples) and manages core sample and data distribution.

More about Chikyu

icon Explore the Deep Earth with Chikyu (6.57 MB)

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Riser Drilling

The riser system uses an outer casing that surrounds the drill pipe to provide return circulation of engineered drilling fluid. This maintains pressure balance within the borehole and removes cuttings, enabling deeper drilling. A blowout preventer (BOP) protects the vessel from formation overpressure. 

What is Riser Drilling?



IODP Photo Gallery

Core from Great Barrier Reef
Core from Great Barrier Reef
Ocean Hall  (Smithsonian Museum 2)
Ocean Hall (Smithsonian Museum 2)
With gas masks in lab Exp.331
With gas masks in lab Exp.331